LG hombot robot vacuum cleaner disassembly

J

Jan Panteltje

Guest
LG hombot robot vacuum cleaner disassembly

I got the open source software from LG,
but no reply on my request for a service manual,
and could not find out how to open it without damaging the plastic.
Anyways It started screaming error messages at me,
and stopped working altogether.
Now that is a guarantee case, but sending it back, paying for return shipment,
just to get an other defective one back?
So, after it kept screaming and the whole neighborhood was now looking what was going on
'HOMEBOT CANNOT CONTINUE THERE IS A PROBLEM WITH THE SUCTION MOTOR'
I wanted to shoot it, I remember Elvis once shot a TV set..
anyways, wanted to see what was inside, wanted to re-design the piece of shit (do not buy this crap!!!)
so as it was not working anyways, decided to open it the smart and fast way,
dropped it from 1.5 meters on a concrete floor.
that did it.
Red (warning color!!!) cover flipped of, and there were a couple of real screws exposed.
removed these and had a look inside.
This is the main board:
http://panteltje.com/pub/LG_hombot_main_PCB_IMG_4432.JPG
The huge white 'chip' in the middle is from these guys:
http://www.minfinity.com/eng/page.php?Main=1&sub=1&tab=2
The processor or whatever it is says ST on it

The 'suction motor drive' detail is here:
http://panteltje.com/pub/LG_hombot_main_board_2_sucktion_motor_drive_detail__IMG_4434.JPG
nothing wrong with the motor, this seems just a MOSFET, motor in drain,
flyback protection diode D21, and sense resistor in the source (R100),
and mystery component BD16, there are several BDxxx in its motor drive circuits, no idea what it is.
The sense resistor seems bad soldered, maybe the solder connection drops too much.
Will put that motor on the lab supply later (just a freaking simple permanent magnet type DC motor).

An other mystery component, could be camera, there are supposed to be 2, one looking up and one down,
would have been more clever if one was looking were it was going, my plants for example!!, idiots.
http://panteltje.com/pub/LG_hombot_mystery_component_IMG_4435.JPG

Anyways maybe the repair group likes this info,
the top red bezel is fixed with click clack plastic hooks, the 'entrance':
http://panteltje.com/pub/LG_hombot_entry_door_IMG_4436.JPG
http://panteltje.com/pub/LG_hombot_entry_door_back_with_hooks_IMG_4438.JPG

Seems a hobbyist design on a bad day by just arrived interns.
'Look we have a robotic vacuum cleaner to.'
Its hight is too high (cannot get under anything).
It get stuck on everything (carpet what not).
I throws over plants.
It scream swith a very loud female voice all the time (into the distortion),
even if you activate 'mute' it screams 'MUTE HAS BEEN ACTIVATED'
Morons!!
And it destroys any cabling you may have, pulled out the wires from the speakers,
grabbed an ethernet cable and pulled it all the way, just pure luck it did not pull the camera connected to it on the floor..

My first LG product, and absolutely and 100% certain my last even if I got one or ten for free.
Wrote it of, see if I can do better some day, with the parts.

There marketing is good, maybe they write their own reviews like Samsung.
 
In sci.electronics.design Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote:
LG hombot robot vacuum cleaner disassembly

I got the open source software from LG,
but no reply on my request for a service manual,
and could not find out how to open it without damaging the plastic.
Anyways It started screaming error messages at me,
and stopped working altogether.
Now that is a guarantee case, but sending it back, paying for return shipment,
just to get an other defective one back?
So, after it kept screaming and the whole neighborhood was now looking what was going on
'HOMEBOT CANNOT CONTINUE THERE IS A PROBLEM WITH THE SUCTION MOTOR'
I wanted to shoot it, I remember Elvis once shot a TV set..
anyways, wanted to see what was inside, wanted to re-design the piece of shit (do not buy this crap!!!)
so as it was not working anyways, decided to open it the smart and fast way,
dropped it from 1.5 meters on a concrete floor.
that did it.
Red (warning color!!!) cover flipped of, and there were a couple of real screws exposed.
removed these and had a look inside.
This is the main board:
http://panteltje.com/pub/LG_hombot_main_PCB_IMG_4432.JPG
Click to expand...

looks vaguely like an old CD player or something.

The huge white 'chip' in the middle is from these guys:
http://www.minfinity.com/eng/page.php?Main=1&sub=1&tab=2
The processor or whatever it is says ST on it

The 'suction motor drive' detail is here:
http://panteltje.com/pub/LG_hombot_main_board_2_sucktion_motor_drive_detail__IMG_4434.JPG
nothing wrong with the motor, this seems just a MOSFET, motor in drain,
flyback protection diode D21, and sense resistor in the source (R100),
and mystery component BD16, there are several BDxxx in its motor drive circuits, no idea what it is.
The sense resistor seems bad soldered, maybe the solder connection drops too much.
Will put that motor on the lab supply later (just a freaking simple permanent magnet type DC motor).

An other mystery component, could be camera, there are supposed to be 2, one looking up and one down,
would have been more clever if one was looking were it was going, my plants for example!!, idiots.
http://panteltje.com/pub/LG_hombot_mystery_component_IMG_4435.JPG
Click to expand...

There must be hundreds of screws in that thing.

Anyways maybe the repair group likes this info,
the top red bezel is fixed with click clack plastic hooks, the 'entrance':
http://panteltje.com/pub/LG_hombot_entry_door_IMG_4436.JPG
http://panteltje.com/pub/LG_hombot_entry_door_back_with_hooks_IMG_4438.JPG

Seems a hobbyist design on a bad day by just arrived interns.
'Look we have a robotic vacuum cleaner to.'
Its hight is too high (cannot get under anything).
It get stuck on everything (carpet what not).
I throws over plants.
It scream swith a very loud female voice all the time (into the distortion),
even if you activate 'mute' it screams 'MUTE HAS BEEN ACTIVATED'
Morons!!
Click to expand...

horrible.

And it destroys any cabling you may have, pulled out the wires from the speakers,
grabbed an ethernet cable and pulled it all the way, just pure luck it did not pull the camera connected to it on the floor..

My first LG product, and absolutely and 100% certain my last even if I got one or ten for free.
Wrote it of, see if I can do better some day, with the parts.

There marketing is good, maybe they write their own reviews like Samsung.
Click to expand...

haha
 
On Thu, 10 Apr 2014 14:33:07 GMT, Jan Panteltje <pNaonStpealmtje@yahoo.com>
wrote:

LG hombot robot vacuum cleaner disassembly

I got the open source software from LG,
but no reply on my request for a service manual,
and could not find out how to open it without damaging the plastic.
Anyways It started screaming error messages at me,
and stopped working altogether.
Now that is a guarantee case, but sending it back, paying for return shipment,
just to get an other defective one back?
So, after it kept screaming and the whole neighborhood was now looking what was going on
'HOMEBOT CANNOT CONTINUE THERE IS A PROBLEM WITH THE SUCTION MOTOR'
I wanted to shoot it, I remember Elvis once shot a TV set..
anyways, wanted to see what was inside, wanted to re-design the piece of shit (do not buy this crap!!!)
so as it was not working anyways, decided to open it the smart and fast way,
dropped it from 1.5 meters on a concrete floor.
that did it.
Red (warning color!!!) cover flipped of, and there were a couple of real screws exposed.
removed these and had a look inside.
This is the main board:
http://panteltje.com/pub/LG_hombot_main_PCB_IMG_4432.JPG
The huge white 'chip' in the middle is from these guys:
http://www.minfinity.com/eng/page.php?Main=1&sub=1&tab=2
The processor or whatever it is says ST on it

The 'suction motor drive' detail is here:
http://panteltje.com/pub/LG_hombot_main_board_2_sucktion_motor_drive_detail__IMG_4434.JPG
nothing wrong with the motor, this seems just a MOSFET, motor in drain,
flyback protection diode D21, and sense resistor in the source (R100),
and mystery component BD16, there are several BDxxx in its motor drive circuits, no idea what it is.
The sense resistor seems bad soldered, maybe the solder connection drops too much.
Will put that motor on the lab supply later (just a freaking simple permanent magnet type DC motor).

An other mystery component, could be camera, there are supposed to be 2, one looking up and one down,
would have been more clever if one was looking were it was going, my plants for example!!, idiots.
http://panteltje.com/pub/LG_hombot_mystery_component_IMG_4435.JPG

Anyways maybe the repair group likes this info,
the top red bezel is fixed with click clack plastic hooks, the 'entrance':
http://panteltje.com/pub/LG_hombot_entry_door_IMG_4436.JPG
http://panteltje.com/pub/LG_hombot_entry_door_back_with_hooks_IMG_4438.JPG

Seems a hobbyist design on a bad day by just arrived interns.
'Look we have a robotic vacuum cleaner to.'
Its hight is too high (cannot get under anything).
It get stuck on everything (carpet what not).
I throws over plants.
It scream swith a very loud female voice all the time (into the distortion),
even if you activate 'mute' it screams 'MUTE HAS BEEN ACTIVATED'
Morons!!
And it destroys any cabling you may have, pulled out the wires from the speakers,
grabbed an ethernet cable and pulled it all the way, just pure luck it did not pull the camera connected to it on the floor..

My first LG product, and absolutely and 100% certain my last even if I got one or ten for free.
Wrote it of, see if I can do better some day, with the parts.

There marketing is good, maybe they write their own reviews like Samsung.
Click to expand...

Get used to it. Everything nowadays has a computer in it.

Tennis rackets. Stoves. Refrigerators. Telephones. Toilets.

Imagine when everything is online to "the internet of things." You'll spend most
of your life reprogramming, debuggung, repairing, or returning every lamp,
faucet, thermostat, and toaster oven in your house. Upgrade that blender code
from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd
rather be making margueritas.

We bought a new kitchen stove ("gas cooker" in some places) and I wanted one
without digital controls. The computerized ones are everywhere and cost about
$500. The ones without computers are in the $2000 to $5000 range. Can you
imagine a worse environment for cheap electronics than in the top of a stove, or
a dishwasher?

We got an NXR for about $2K.

I also ripped out the programmable thermostat in the cabin and replaced it with
an analog one. Guests were always leaving the old one in all sorts of bizarre
modes and states.

Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a
new belt maybe once a year, but replacement is obvious.

Don't get me started about the controls on my Audi.


--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation
 
On a sunny day (Thu, 10 Apr 2014 08:47:04 -0700) it happened John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
<b2edk9h9dea9m3ef2ogfa3op4fvvfjfgi7@4ax.com>:

Get used to it. Everything nowadays has a computer in it.

Tennis rackets. Stoves. Refrigerators. Telephones. Toilets.

Imagine when everything is online to "the internet of things." You'll spend most
of your life reprogramming, debuggung, repairing, or returning every lamp,
faucet, thermostat, and toaster oven in your house. Upgrade that blender code
from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd
rather be making margueritas.

We bought a new kitchen stove ("gas cooker" in some places) and I wanted one
without digital controls. The computerized ones are everywhere and cost about
$500. The ones without computers are in the $2000 to $5000 range. Can you
imagine a worse environment for cheap electronics than in the top of a stove, or
a dishwasher?

We got an NXR for about $2K.

I also ripped out the programmable thermostat in the cabin and replaced it with
an analog one. Guests were always leaving the old one in all sorts of bizarre
modes and states.

Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a
new belt maybe once a year, but replacement is obvious.

Don't get me started about the controls on my Audi.
Click to expand...

Yea, well I also bought a DirtDevil spider, for a fraction of the money the LG rombot costs.
It has (AFAIK) no computah, no remote, and no cameras, it has a bumper sensor with micro switches it seems.
I did great cleaning under the bench, TV table, its only 7 cm high.
I does not scream, complain, it jumps over cables, is not stopped by low hanging curtains like the LG hombot,
did I mention that LG hombot cannot even find its own charging station?
The Spider you just need to plug in yourself to charge.
It probably has some micro, but it works so good there there is no need to investigate it, it just works.
It sucks less than the LG, both for real and figuratively speaking :)
Never Repair Something That Works.
 
On Thu, 10 Apr 2014 16:05:30 GMT, Jan Panteltje <pNaonStpealmtje@yahoo.com>
wrote:

On a sunny day (Thu, 10 Apr 2014 08:47:04 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
b2edk9h9dea9m3ef2ogfa3op4fvvfjfgi7@4ax.com>:


Get used to it. Everything nowadays has a computer in it.

Tennis rackets. Stoves. Refrigerators. Telephones. Toilets.

Imagine when everything is online to "the internet of things." You'll spend most
of your life reprogramming, debuggung, repairing, or returning every lamp,
faucet, thermostat, and toaster oven in your house. Upgrade that blender code
from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd
rather be making margueritas.

We bought a new kitchen stove ("gas cooker" in some places) and I wanted one
without digital controls. The computerized ones are everywhere and cost about
$500. The ones without computers are in the $2000 to $5000 range. Can you
imagine a worse environment for cheap electronics than in the top of a stove, or
a dishwasher?

We got an NXR for about $2K.

I also ripped out the programmable thermostat in the cabin and replaced it with
an analog one. Guests were always leaving the old one in all sorts of bizarre
modes and states.

Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a
new belt maybe once a year, but replacement is obvious.

Don't get me started about the controls on my Audi.

Yea, well I also bought a DirtDevil spider, for a fraction of the money the LG rombot costs.
It has (AFAIK) no computah, no remote, and no cameras, it has a bumper sensor with micro switches it seems.
I did great cleaning under the bench, TV table, its only 7 cm high.
I does not scream, complain, it jumps over cables, is not stopped by low hanging curtains like the LG hombot,
did I mention that LG hombot cannot even find its own charging station?
The Spider you just need to plug in yourself to charge.
It probably has some micro, but it works so good there there is no need to investigate it, it just works.
It sucks less than the LG, both for real and figuratively speaking :)
Never Repair Something That Works.
Click to expand...

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.


--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation
 
On Thu, 10 Apr 2014 09:16:12 -0700, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Thu, 10 Apr 2014 16:05:30 GMT, Jan Panteltje <pNaonStpealmtje@yahoo.com
wrote:

On a sunny day (Thu, 10 Apr 2014 08:47:04 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
b2edk9h9dea9m3ef2ogfa3op4fvvfjfgi7@4ax.com>:


Get used to it. Everything nowadays has a computer in it.

Tennis rackets. Stoves. Refrigerators. Telephones. Toilets.

Imagine when everything is online to "the internet of things." You'll spend most
of your life reprogramming, debuggung, repairing, or returning every lamp,
faucet, thermostat, and toaster oven in your house. Upgrade that blender code
from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd
rather be making margueritas.

We bought a new kitchen stove ("gas cooker" in some places) and I wanted one
without digital controls. The computerized ones are everywhere and cost about
$500. The ones without computers are in the $2000 to $5000 range. Can you
imagine a worse environment for cheap electronics than in the top of a stove, or
a dishwasher?

We got an NXR for about $2K.

I also ripped out the programmable thermostat in the cabin and replaced it with
an analog one. Guests were always leaving the old one in all sorts of bizarre
modes and states.

Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a
new belt maybe once a year, but replacement is obvious.

Don't get me started about the controls on my Audi.

Yea, well I also bought a DirtDevil spider, for a fraction of the money the LG rombot costs.
It has (AFAIK) no computah, no remote, and no cameras, it has a bumper sensor with micro switches it seems.
I did great cleaning under the bench, TV table, its only 7 cm high.
I does not scream, complain, it jumps over cables, is not stopped by low hanging curtains like the LG hombot,
did I mention that LG hombot cannot even find its own charging station?
The Spider you just need to plug in yourself to charge.
It probably has some micro, but it works so good there there is no need to investigate it, it just works.
It sucks less than the LG, both for real and figuratively speaking :)
Never Repair Something That Works.

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.
Click to expand...

Try some *decent* LiIon tools. Great stuff.
 
On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
<asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:
I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.
Click to expand...

You have a cellphone?
 
On a sunny day (Thu, 10 Apr 2014 13:58:49 -0400) it happened krw@attt.bizz
wrote in <6tmdk999svtb78jv598vbbbkr65lqrc4jh@4ax.com>:

On Thu, 10 Apr 2014 09:16:12 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Thu, 10 Apr 2014 16:05:30 GMT, Jan Panteltje <pNaonStpealmtje@yahoo.com
wrote:

On a sunny day (Thu, 10 Apr 2014 08:47:04 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
b2edk9h9dea9m3ef2ogfa3op4fvvfjfgi7@4ax.com>:


Get used to it. Everything nowadays has a computer in it.

Tennis rackets. Stoves. Refrigerators. Telephones. Toilets.

Imagine when everything is online to "the internet of things." You'll spend most
of your life reprogramming, debuggung, repairing, or returning every lamp,
faucet, thermostat, and toaster oven in your house. Upgrade that blender code
from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd
rather be making margueritas.

We bought a new kitchen stove ("gas cooker" in some places) and I wanted one
without digital controls. The computerized ones are everywhere and cost about
$500. The ones without computers are in the $2000 to $5000 range. Can you
imagine a worse environment for cheap electronics than in the top of a stove, or
a dishwasher?

We got an NXR for about $2K.

I also ripped out the programmable thermostat in the cabin and replaced it with
an analog one. Guests were always leaving the old one in all sorts of bizarre
modes and states.

Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a
new belt maybe once a year, but replacement is obvious.

Don't get me started about the controls on my Audi.

Yea, well I also bought a DirtDevil spider, for a fraction of the money the LG rombot costs.
It has (AFAIK) no computah, no remote, and no cameras, it has a bumper sensor with micro switches it seems.
I did great cleaning under the bench, TV table, its only 7 cm high.
I does not scream, complain, it jumps over cables, is not stopped by low hanging curtains like the LG hombot,
did I mention that LG hombot cannot even find its own charging station?
The Spider you just need to plug in yourself to charge.
It probably has some micro, but it works so good there there is no need to investigate it, it just works.
It sucks less than the LG, both for real and figuratively speaking :)
Never Repair Something That Works.

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

Try some *decent* LiIon tools. Great stuff.
Click to expand...

Yep, Lipos are cool, just got some new ones
and was testing USB charger chip MCP73831T
programmabe current, amazing charging, nice chip.

But limited number of charge discharge cycles lipos have,
John is right about that (350 times perhaps).
 
On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?
Click to expand...

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.


--

John Larkin Highland Technology, Inc

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
 
On Thu, 10 Apr 2014 18:53:16 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 13:58:49 -0400) it happened krw@attt.bizz
wrote in <6tmdk999svtb78jv598vbbbkr65lqrc4jh@4ax.com>:

On Thu, 10 Apr 2014 09:16:12 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Thu, 10 Apr 2014 16:05:30 GMT, Jan Panteltje <pNaonStpealmtje@yahoo.com
wrote:

On a sunny day (Thu, 10 Apr 2014 08:47:04 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
b2edk9h9dea9m3ef2ogfa3op4fvvfjfgi7@4ax.com>:


Get used to it. Everything nowadays has a computer in it.

Tennis rackets. Stoves. Refrigerators. Telephones. Toilets.

Imagine when everything is online to "the internet of things." You'll spend most
of your life reprogramming, debuggung, repairing, or returning every lamp,
faucet, thermostat, and toaster oven in your house. Upgrade that blender code
from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd
rather be making margueritas.

We bought a new kitchen stove ("gas cooker" in some places) and I wanted one
without digital controls. The computerized ones are everywhere and cost about
$500. The ones without computers are in the $2000 to $5000 range. Can you
imagine a worse environment for cheap electronics than in the top of a stove, or
a dishwasher?

We got an NXR for about $2K.

I also ripped out the programmable thermostat in the cabin and replaced it with
an analog one. Guests were always leaving the old one in all sorts of bizarre
modes and states.

Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a
new belt maybe once a year, but replacement is obvious.

Don't get me started about the controls on my Audi.

Yea, well I also bought a DirtDevil spider, for a fraction of the money the LG rombot costs.
It has (AFAIK) no computah, no remote, and no cameras, it has a bumper sensor with micro switches it seems.
I did great cleaning under the bench, TV table, its only 7 cm high.
I does not scream, complain, it jumps over cables, is not stopped by low hanging curtains like the LG hombot,
did I mention that LG hombot cannot even find its own charging station?
The Spider you just need to plug in yourself to charge.
It probably has some micro, but it works so good there there is no need to investigate it, it just works.
It sucks less than the LG, both for real and figuratively speaking :)
Never Repair Something That Works.

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

Try some *decent* LiIon tools. Great stuff.

Yep, Lipos are cool, just got some new ones
and was testing USB charger chip MCP73831T
programmabe current, amazing charging, nice chip.
Click to expand...

Microchip has some nice parts.

But limited number of charge discharge cycles lipos have,
John is right about that (350 times perhaps).
Click to expand...

*Easily* 500 cycles and more like 1000. Because the self-discharge is
so small, that's generally a long time.
 
On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.
Click to expand...

You're not going to get a "horsepower or so" out of a hand tool.
You're in the stationary tool realm at a HP (Craftsman HPs don't
count).
 
On Thu, 10 Apr 2014 18:37:39 -0400, krw@attt.bizz wrote:

On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.

You're not going to get a "horsepower or so" out of a hand tool.
You're in the stationary tool realm at a HP (Craftsman HPs don't
count).
Click to expand...

120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps,
1560 watts.




--

John Larkin Highland Technology, Inc

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
 
On 10/04/14 22:33, Jan Panteltje wrote:
LG hombot robot vacuum cleaner disassembly

I got the open source software from LG,
but no reply on my request for a service manual,
and could not find out how to open it without damaging the plastic.
Anyways It started screaming error messages at me,
and stopped working altogether.
Now that is a guarantee case, but sending it back, paying for return shipment,
just to get an other defective one back?
So, after it kept screaming and the whole neighborhood was now looking what was going on
'HOMEBOT CANNOT CONTINUE THERE IS A PROBLEM WITH THE SUCTION MOTOR'
I wanted to shoot it, I remember Elvis once shot a TV set..
anyways, wanted to see what was inside, wanted to re-design the piece of shit (do not buy this crap!!!)
so as it was not working anyways, decided to open it the smart and fast way,
dropped it from 1.5 meters on a concrete floor.
that did it.
Red (warning color!!!) cover flipped of, and there were a couple of real screws exposed.
removed these and had a look inside.
This is the main board:
http://panteltje.com/pub/LG_hombot_main_PCB_IMG_4432.JPG
The huge white 'chip' in the middle is from these guys:
http://www.minfinity.com/eng/page.php?Main=1&sub=1&tab=2
The processor or whatever it is says ST on it

The 'suction motor drive' detail is here:
http://panteltje.com/pub/LG_hombot_main_board_2_sucktion_motor_drive_detail__IMG_4434.JPG
nothing wrong with the motor, this seems just a MOSFET, motor in drain,
flyback protection diode D21, and sense resistor in the source (R100),
and mystery component BD16, there are several BDxxx in its motor drive circuits, no idea what it is.
The sense resistor seems bad soldered, maybe the solder connection drops too much.
Will put that motor on the lab supply later (just a freaking simple permanent magnet type DC motor).

An other mystery component, could be camera, there are supposed to be 2, one looking up and one down,
would have been more clever if one was looking were it was going, my plants for example!!, idiots.
http://panteltje.com/pub/LG_hombot_mystery_component_IMG_4435.JPG

Anyways maybe the repair group likes this info,
the top red bezel is fixed with click clack plastic hooks, the 'entrance':
http://panteltje.com/pub/LG_hombot_entry_door_IMG_4436.JPG
http://panteltje.com/pub/LG_hombot_entry_door_back_with_hooks_IMG_4438.JPG

Seems a hobbyist design on a bad day by just arrived interns.
'Look we have a robotic vacuum cleaner to.'
Its hight is too high (cannot get under anything).
It get stuck on everything (carpet what not).
I throws over plants.
It scream swith a very loud female voice all the time (into the distortion),
even if you activate 'mute' it screams 'MUTE HAS BEEN ACTIVATED'
Morons!!
And it destroys any cabling you may have, pulled out the wires from the speakers,
grabbed an ethernet cable and pulled it all the way, just pure luck it did not pull the camera connected to it on the floor..

My first LG product, and absolutely and 100% certain my last even if I got one or ten for free.
Wrote it of, see if I can do better some day, with the parts.

There marketing is good, maybe they write their own reviews like Samsung.
Click to expand...
Well I married my room cleaner.
The interface can be quirky but as a multifunction unit the versatility
can't be beat. That said it will not work 24/7 but can easily find it's
charging device hwen required.
 
On Thu, 10 Apr 2014 16:42:37 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:37:39 -0400, krw@attt.bizz wrote:

On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.

You're not going to get a "horsepower or so" out of a hand tool.
You're in the stationary tool realm at a HP (Craftsman HPs don't
count).

120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps,
1560 watts.
Click to expand...

Utter nonsense. Show me one with a 14GA cord. Better yet, put a
meter on one and show me where it's drawing anything close to 500W, in
use. They may draw 15A at stall (doubtful), but it'll be an
interesting ride if you do stall one. A stalled saw isn't very
useful, either.

A battery powered circular saw isn't at all useless (I have two) but
it's not a replacement for a corded saw. Drills and drivers are
another matter. I only have one corded drill anymore (and over a
dozen cordless drivers and drills), a 1/2" hammer drill that I've
never used.
 
On a sunny day (Thu, 10 Apr 2014 15:07:38 -0700) it happened John Larkin
<jlarkin@highlandtechnology.com> wrote in
<rc5ek9hh44dpr9bkjcnrr907r7l0lsthkp@4ax.com>:

On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.
Click to expand...

Yes, true, at 100% charge /discharge about 350 times or so on a lipo.
I have VARTA datasheet somewhere .. for the LP523450LP I am using (3.7 V 1Ah single cell):
300 cycles at > 80% capacity
500 cycles at > 70% capacity

2 years...

Cellphones do not always discharge 100%, had my Nokia for at least 3 years, charged every day.
Ther are bad batteries too, some die after a week.
 
On a sunny day (Thu, 10 Apr 2014 18:35:53 -0400) it happened krw@attt.bizz
wrote in <q27ek9p5tfblb9bmme8t918iob78gb2r7k@4ax.com>:

But limited number of charge discharge cycles lipos have,
John is right about that (350 times perhaps).

*Easily* 500 cycles and more like 1000. Because the self-discharge is
so small, that's generally a long time.
Click to expand...

See my reply to Jonhn, about the Varta datasheet
Or google Varta LP523450DL lithium ion.
 
On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:37:39 -0400, krw@attt.bizz wrote:

On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.

You're not going to get a "horsepower or so" out of a hand tool.
You're in the stationary tool realm at a HP (Craftsman HPs don't
count).

120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps,
1560 watts.
Click to expand...

Cordless circular saws (even small 6.5" ones) are close to useless.

I've got a Hitachi one that came in a kit- cut up few ~2" branches
that were felled by an ice storm and it was already dying.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:37:39 -0400, krw@attt.bizz wrote:

On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.

You're not going to get a "horsepower or so" out of a hand tool.
You're in the stationary tool realm at a HP (Craftsman HPs don't
count).

120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps,
1560 watts.

Cordless circular saws (even small 6.5" ones) are close to useless.
Click to expand...

Not so. I have a DeWalt that's quite nice on plywood and such. I
also have an older Makita that's great for cedar siding. It sure as
hell beats a 10lb. corded monster when you're trying to trim a piece
of siding, 15' up a ladder on the side of the house. ;-)

I've got a Hitachi one that came in a kit- cut up few ~2" branches
that were felled by an ice storm and it was already dying.
Click to expand...

A circular saw used on a tree? You must be suicidal. Cutting a 2"
diameter branch with a 6" saw? You *have* to be! Haven't you ever
heard of a chain saw, or even a reciprocating saw? ;-)
 
On Fri, 11 Apr 2014 18:49:37 -0400, krw@attt.bizz wrote:

On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany
speffSNIP@interlogDOTyou.knowwhat> wrote:

On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:37:39 -0400, krw@attt.bizz wrote:

On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.

You're not going to get a "horsepower or so" out of a hand tool.
You're in the stationary tool realm at a HP (Craftsman HPs don't
count).

120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps,
1560 watts.

Cordless circular saws (even small 6.5" ones) are close to useless.

Not so. I have a DeWalt that's quite nice on plywood and such. I
also have an older Makita that's great for cedar siding. It sure as
hell beats a 10lb. corded monster when you're trying to trim a piece
of siding, 15' up a ladder on the side of the house. ;-)

I've got a Hitachi one that came in a kit- cut up few ~2" branches
that were felled by an ice storm and it was already dying.

A circular saw used on a tree? You must be suicidal. Cutting a 2"
diameter branch with a 6" saw? You *have* to be! Haven't you ever
heard of a chain saw, or even a reciprocating saw? ;-)
Click to expand...

Aren't trees still made out of wood?


--

John Larkin Highland Technology, Inc

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
 
On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Fri, 11 Apr 2014 18:49:37 -0400, krw@attt.bizz wrote:

On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany
speffSNIP@interlogDOTyou.knowwhat> wrote:

On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:37:39 -0400, krw@attt.bizz wrote:

On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
asgdk9d29q9ds74218i3r5me51loi12pm5@4ax.com>:

I avoid battery-powered tools. They are wimpy, and the batteries will die in a
year or two.

You have a cellphone?

Sure, a simple one. I charge it about every other week, and I've
replaced the battery once. But it's not a power tool.

You're not going to get a horsepower or so out of a battery for long,
especially when the battery is two years old.

You're not going to get a "horsepower or so" out of a hand tool.
You're in the stationary tool realm at a HP (Craftsman HPs don't
count).

120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps,
1560 watts.

Cordless circular saws (even small 6.5" ones) are close to useless.

Not so. I have a DeWalt that's quite nice on plywood and such. I
also have an older Makita that's great for cedar siding. It sure as
hell beats a 10lb. corded monster when you're trying to trim a piece
of siding, 15' up a ladder on the side of the house. ;-)

I've got a Hitachi one that came in a kit- cut up few ~2" branches
that were felled by an ice storm and it was already dying.

A circular saw used on a tree? You must be suicidal. Cutting a 2"
diameter branch with a 6" saw? You *have* to be! Haven't you ever
heard of a chain saw, or even a reciprocating saw? ;-)

Aren't trees still made out of wood?
Click to expand...

Yes, and fingers are still made of skin and bone; much softer than
even wood. Circular saws are very dangerous things when used by a
someone with no respect for them. They are *not* designed for this
sort of thing.
 
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