Tooling up for SMT

Z

Z

Guest
I'm considering tooling up for surface mount devices and
How much is this going to cost?

I'd be doing it is stages .
Soldering de-soldering of discrete devices then for instance tool up
test gear probes then chip probes and blocks.

Anyone tooled up for surface mount care to go through the initial kit
they got, capital outlays, how much it is used and if it has been
profitable or not. What is considered essential kit to start with?

--
Z
Remove all Zeds in e-mail address to reply.
 
Individual resistors/capacitors have special sized notched tips for removal.
A good set runs under $500 total including the custom sized tools to
actually hold the devices in place for soldering.

Large flat pack ics most certainly require something called a Hozan (or
other hot air devices). The Hozan itself ran around $15,000 with each sized
tip in the few hundred dollars. All US$.

For very light duty surface mount repairs on low density boards, there is
something called Chip-Quick which is useful, but takes some practice to use
and a complete cleaning and retinning of the board is required after the
part is removed.

Unless you have manufacture support to order the surface mount ics at a
price that makes economic sense for the consumer, many custom ics simply are
not available by any other source in single quantities. It took over 6
years just to break even on the Hozan, this is at a shop that does a gross
of just around $500,000 in total repairs per year. Reasons are many: 1.
the number of declined estimates for repair due to the decreasing cost of
replacement items. 2. the unavailability of the custom parts after the
units are more than 2 years old. 3. On the warranty repairs, the low
manufacture reimbursement rates. 4. The simple lack of numbers of the type
of failures that required the use of the Hozan.


"Z" <post@imaris.demon.co.uk> wrote in message
news:V1HHrjwXZqpAFwzw@imaris.demon.co.uk...
I'm considering tooling up for surface mount devices and
How much is this going to cost?

I'd be doing it is stages .
Soldering de-soldering of discrete devices then for instance tool up
test gear probes then chip probes and blocks.

Anyone tooled up for surface mount care to go through the initial kit
they got, capital outlays, how much it is used and if it has been
profitable or not. What is considered essential kit to start with?

--
Z
Remove all Zeds in e-mail address to reply.
Click to expand...
 
In article <40a6efd0@news.greennet.net>, David <dkuhajda@locl.net.spam>
writes
Individual resistors/capacitors have special sized notched tips for removal.
A good set runs under $500 total including the custom sized tools to
actually hold the devices in place for soldering.

Large flat pack ics most certainly require something called a Hozan (or
other hot air devices). The Hozan itself ran around $15,000 with each sized
tip in the few hundred dollars. All US$.

For very light duty surface mount repairs on low density boards, there is
something called Chip-Quick which is useful, but takes some practice to use
and a complete cleaning and retinning of the board is required after the
part is removed.

Unless you have manufacture support to order the surface mount ics at a
price that makes economic sense for the consumer, many custom ics simply are
not available by any other source in single quantities. It took over 6
years just to break even on the Hozan, this is at a shop that does a gross
of just around $500,000 in total repairs per year. Reasons are many: 1.
the number of declined estimates for repair due to the decreasing cost of
replacement items. 2. the unavailability of the custom parts after the
units are more than 2 years old. 3. On the warranty repairs, the low
manufacture reimbursement rates. 4. The simple lack of numbers of the type
of failures that required the use of the Hozan.


Thank you for saving me going down that road.
Click to expand...


"Z" <post@imaris.demon.co.uk> wrote in message
news:V1HHrjwXZqpAFwzw@imaris.demon.co.uk...
I'm considering tooling up for surface mount devices and
How much is this going to cost?

I'd be doing it is stages .
Soldering de-soldering of discrete devices then for instance tool up
test gear probes then chip probes and blocks.

Anyone tooled up for surface mount care to go through the initial kit
they got, capital outlays, how much it is used and if it has been
profitable or not. What is considered essential kit to start with?

--
Z
Remove all Zeds in e-mail address to reply.
Click to expand...
--
Z
Remove all Zeds in e-mail address to reply.
 
"David" <dkuhajda@locl.net.spam> wrote in message
news:40a6efd0@news.greennet.net...
Individual resistors/capacitors have special sized notched tips for
removal.
A good set runs under $500 total including the custom sized tools to
actually hold the devices in place for soldering.

Large flat pack ics most certainly require something called a Hozan (or
other hot air devices). The Hozan itself ran around $15,000 with each
sized
tip in the few hundred dollars. All US$.

For very light duty surface mount repairs on low density boards, there is
something called Chip-Quick which is useful, but takes some practice to
use
and a complete cleaning and retinning of the board is required after the
part is removed.

Unless you have manufacture support to order the surface mount ics at a
price that makes economic sense for the consumer, many custom ics simply
are
not available by any other source in single quantities. It took over 6
years just to break even on the Hozan, this is at a shop that does a gross
of just around $500,000 in total repairs per year. Reasons are many: 1.
the number of declined estimates for repair due to the decreasing cost of
replacement items. 2. the unavailability of the custom parts after the
units are more than 2 years old. 3. On the warranty repairs, the low
manufacture reimbursement rates. 4. The simple lack of numbers of the
type
of failures that required the use of the Hozan.


"Z" <post@imaris.demon.co.uk> wrote in message
news:V1HHrjwXZqpAFwzw@imaris.demon.co.uk...
I'm considering tooling up for surface mount devices and
How much is this going to cost?

I'd be doing it is stages .
Soldering de-soldering of discrete devices then for instance tool up
test gear probes then chip probes and blocks.

Anyone tooled up for surface mount care to go through the initial kit
they got, capital outlays, how much it is used and if it has been
profitable or not. What is considered essential kit to start with?

--
Z
Remove all Zeds in e-mail address to reply.
Click to expand...
All very well for someone desoldering SMDs day in , day out.
I post the following for the likes of myself only faced with SM IC
desoldering once or twice a month


Hint for de-soldering surface mount ICs.
Use a hot-air paint-stripper,1400W,500 degree centigrade,with 2 level heat
control to prolong element life.
Form a ring of silicone covered wire around the IC{to isolate the remaing
components on the pcb.Push a thin piece of wire
under one side of the IC and form a loop around the IC,repeat on the other
side;this is to remove the IC when the solder melts, tug on these wires
while
heating up to ensure minimum heating contact time.
Place a slab of PTFE with right size hole cut into and
clip pcb and slab together with clothes pegs/Bulldog clips etc.
If the IC is for re-use then cover body of IC with heat insulating material
or blast IC with freezer spray.Allow the hot-air gun to get up to heat{say 1
minute}
before applying to IC.
For more crowded boards make "conical" shrouds to surround the IC. I used
some PTFE strip that i had but thin paxolin or similar but drilled and wired
together would probably do. Cut 4 small trapezoids from the PTFE strip.
Fixed together with all long edges one side and short edges adjascent on the
other side. Fixed together with paper staples but for the smallest shroud
for 8 pin SM had to wire together the final join. Forms a sort of truncated
cone in shape. Stick to the board (to stop the blower blowing it off) with
blue - tack or similar.
When practised the heated contact time should be less than
2 seconds - no board distortion or collateral damage surprisingly.

SAFETY NOTE:- ensure good ventilation, use safety goggles,and beware of very
slight risk of combustion.

electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse

Nigel, Diverse Devices,Southampton, England
 
And a few extra points
If you can't get the tugging wires under the IC then pass
under a few pins at each corner.
Because this tugging frees the IC at the earlies moment the solder
on the board is not fully melted and leaves a profile for localising
the new IC in place and then solder pin by pin
 
Hakko makes a tool, the Mach-FP which is inexpensive for SMD removal. Some
practice is required to become proficient with this tool, however I've been
using one for almost 7 years now and haven't damaged any PCB's.
http://www.hakkousa.com/products.asp?PID=Mach-FP&page=1
Handpiece with the tips runs about $250 USD. SMD components can be
reinstalled with a standard soldering iron easily with the appropriate
technique.


--
Jammy Harbin
J & J Electronics, Inc.
227 S. 4th St.
Selmer, TN 38375
731-645-3311
"N Cook" <diverse2@tcp.co.antyspahm.uk> wrote in message
news:9YydnUEx8uSl0TrdRVn-hA@tcp.co.uk...
And a few extra points
If you can't get the tugging wires under the IC then pass
under a few pins at each corner.
Because this tugging frees the IC at the earlies moment the solder
on the board is not fully melted and leaves a profile for localising
the new IC in place and then solder pin by pin
Click to expand...
 
Hi!

I've used JBC products for PC mainboard repair, a lot cheaper than
others. Used it for QFPs and PLCCs. It costs US$ 2,390 with all
accessories for the JT7000
(http://www.howardelectronics.com/jbc/jt7000.html) . I've evaluated
other brands, they don't come close with ease of use. A medium sized QFP
can be removed in 20 secs! Quick removal translates to less PCB/chip
damage.

Removing the SMT part is the easy part, profitabilty is another.

Regards.
 
In article <dOCdnQUbpfoFtTrdRVn-gQ@tcp.co.uk>, N Cook
<diverse2@tcp.co.antyspahm.uk> writes
"David" <dkuhajda@locl.net.spam> wrote in message
news:40a6efd0@news.greennet.net...
Individual resistors/capacitors have special sized notched tips for
removal.
A good set runs under $500 total including the custom sized tools to
actually hold the devices in place for soldering.

Large flat pack ics most certainly require something called a Hozan (or
other hot air devices). The Hozan itself ran around $15,000 with each
sized
tip in the few hundred dollars. All US$.

For very light duty surface mount repairs on low density boards, there is
something called Chip-Quick which is useful, but takes some practice to
use
and a complete cleaning and retinning of the board is required after the
part is removed.

Unless you have manufacture support to order the surface mount ics at a
price that makes economic sense for the consumer, many custom ics simply
are
not available by any other source in single quantities. It took over 6
years just to break even on the Hozan, this is at a shop that does a gross
of just around $500,000 in total repairs per year. Reasons are many: 1.
the number of declined estimates for repair due to the decreasing cost of
replacement items. 2. the unavailability of the custom parts after the
units are more than 2 years old. 3. On the warranty repairs, the low
manufacture reimbursement rates. 4. The simple lack of numbers of the
type
of failures that required the use of the Hozan.


"Z" <post@imaris.demon.co.uk> wrote in message
news:V1HHrjwXZqpAFwzw@imaris.demon.co.uk...
I'm considering tooling up for surface mount devices and
How much is this going to cost?

I'd be doing it is stages .
Soldering de-soldering of discrete devices then for instance tool up
test gear probes then chip probes and blocks.

Anyone tooled up for surface mount care to go through the initial kit
they got, capital outlays, how much it is used and if it has been
profitable or not. What is considered essential kit to start with?

--
Z
Remove all Zeds in e-mail address to reply.



All very well for someone desoldering SMDs day in , day out.
I post the following for the likes of myself only faced with SM IC
desoldering once or twice a month


Hint for de-soldering surface mount ICs.
Use a hot-air paint-stripper,1400W,500 degree centigrade,with 2 level heat
control to prolong element life.
Form a ring of silicone covered wire around the IC{to isolate the remaing
components on the pcb.Push a thin piece of wire
under one side of the IC and form a loop around the IC,repeat on the other
side;this is to remove the IC when the solder melts, tug on these wires
while
heating up to ensure minimum heating contact time.
Place a slab of PTFE with right size hole cut into and
clip pcb and slab together with clothes pegs/Bulldog clips etc.
If the IC is for re-use then cover body of IC with heat insulating material
or blast IC with freezer spray.Allow the hot-air gun to get up to heat{say 1
minute}
before applying to IC.
For more crowded boards make "conical" shrouds to surround the IC. I used
some PTFE strip that i had but thin paxolin or similar but drilled and wired
together would probably do. Cut 4 small trapezoids from the PTFE strip.
Fixed together with all long edges one side and short edges adjascent on the
other side. Fixed together with paper staples but for the smallest shroud
for 8 pin SM had to wire together the final join. Forms a sort of truncated
cone in shape. Stick to the board (to stop the blower blowing it off) with
blue - tack or similar.
When practised the heated contact time should be less than
2 seconds - no board distortion or collateral damage surprisingly.

SAFETY NOTE:- ensure good ventilation, use safety goggles,and beware of very
slight risk of combustion.

electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse

Nigel, Diverse Devices,Southampton, England




Thanks for the tips. S/M is not something I do much of so buying the the
Click to expand...
kit is a bit on the extravagant side just now.

I had a look on your tips section of your website. The book tips about a
third of the way down http://www.divdev.fsnet.co.uk/tips2.htm ; have the
repairs held up over two to three years?

--
Z
Remove all Zeds in e-mail address to reply.
 
Thanks for the tips. S/M is not something I do much of so buying the the
kit is a bit on the extravagant side just now.

I had a look on your tips section of your website. The book tips about a
third of the way down http://www.divdev.fsnet.co.uk/tips2.htm ; have the
repairs held up over two to three years?

--
Z
Remove all Zeds in e-mail address to reply.
Click to expand...
If you mean the anti-acidic treatment.
Yes seems to halt the rot, reduces the browning but
perhaps black print is less black and the wet process does ruin any binding.
As confirmation I still do it now and again to different books

electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse

Nigel, Diverse Devices,Southampton, England
 
If you mean the anti-acidic treatment.
Yes seems to halt the rot, reduces the browning but
perhaps black print is less black and the wet process does ruin any
binding.
As confirmation I still do it now and again to different books

electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse

Nigel, Diverse Devices,Southampton, England
Click to expand...
I just tried some universal indicator for the pH of this first treated
Brimar valve databook,3 years ago now, is still about pH 9.5 The paper feels
more supple ie less brittle than before treatment, no trace of continued
edge fraying.
 
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