Would a PIC type device and EPROM be appropriate for this?

E

Eric R Snow

Guest
Greetings,
I have several electronic linear measuring scales. The resoultion of
these devices is .0005". Accuracy is + or - .001". However, there are
apparently 20480 pulses per inch coming from the scales when moved.
This equates to about .00005" resolution. So I was thinking about
mapping the scales. I have the equipment to move these scales in
..0001" increments with a non accumulating error of less than .00004"
per step. So, if I wanted to have scale with 8 inches travel with
..0001" resolution it would require 80,000 measurements and somehow
these measurements would need to be associated with the scale so that
the digital readout would show how far the scale had actually moved to
within .0001". Is this "mapping" something that could be easily and
cheaply handled a PIC and an Eprom? I hope the above was not too
vague.
Thanks,
Eric R Snow
 
Eric R Snow wrote:

Greetings,
I have several electronic linear measuring scales. The resoultion of
these devices is .0005". Accuracy is + or - .001". However, there are
apparently 20480 pulses per inch coming from the scales when moved.
This equates to about .00005" resolution. So I was thinking about
mapping the scales. I have the equipment to move these scales in
.0001" increments with a non accumulating error of less than .00004"
per step. So, if I wanted to have scale with 8 inches travel with
.0001" resolution it would require 80,000 measurements and somehow
these measurements would need to be associated with the scale so that
the digital readout would show how far the scale had actually moved to
within .0001". Is this "mapping" something that could be easily and
cheaply handled a PIC and an Eprom? I hope the above was not too
vague.
Thanks,
Eric R Snow
yes, it can be done very simply with a PIC, no Eprom needed.
Click to expand...
PIC's are getting large these days with lots of goodies in them
also you have the AVR's (Atmels)which are nice to play with.
in any case, you need to get your self a Dev kit..
you may want to look into Rabit Kits., those are complete onboard
CPU's loaded with memory, Networking etc..
 
On Wed, 20 Apr 2005 18:24:27 -0700, Jamie
<jamie_5_not_valid_after_5_Please@charter.net> wrote:

Eric R Snow wrote:

Greetings,
I have several electronic linear measuring scales. The resoultion of
these devices is .0005". Accuracy is + or - .001". However, there are
apparently 20480 pulses per inch coming from the scales when moved.
This equates to about .00005" resolution. So I was thinking about
mapping the scales. I have the equipment to move these scales in
.0001" increments with a non accumulating error of less than .00004"
per step. So, if I wanted to have scale with 8 inches travel with
.0001" resolution it would require 80,000 measurements and somehow
these measurements would need to be associated with the scale so that
the digital readout would show how far the scale had actually moved to
within .0001". Is this "mapping" something that could be easily and
cheaply handled a PIC and an Eprom? I hope the above was not too
vague.
Thanks,
Eric R Snow
yes, it can be done very simply with a PIC, no Eprom needed.
PIC's are getting large these days with lots of goodies in them
also you have the AVR's (Atmels)which are nice to play with.
in any case, you need to get your self a Dev kit..
you may want to look into Rabit Kits., those are complete onboard
CPU's loaded with memory, Networking etc..
Thanks For the reply. I'll look into the rabbit web site.
Click to expand...
Eric
 
GOOD DAY

We have added a PIC between an encoder & it's readout to adapt a standard
encoder to a special PPR
they worked on first install, for us a 1 day job to get it working/debugged

we also use a couple of bits on top of E-prom on another " Backgauge "
product, to select the encoder input used, include Imperial / Metric

I have also used a E-prom to map the runnout error on a ball screw, however
I don't think you want to correct for a faulty encoder.

Peter


"Eric R Snow" <etpm@whidbey.com> wrote in message
news:a59b61pm4117tjd523mboki7fnvr9eb2du@4ax.com...
Greetings,
I have several electronic linear measuring scales. The resoultion of
these devices is .0005". Accuracy is + or - .001". However, there are
apparently 20480 pulses per inch coming from the scales when moved.
This equates to about .00005" resolution. So I was thinking about
mapping the scales. I have the equipment to move these scales in
.0001" increments with a non accumulating error of less than .00004"
per step. So, if I wanted to have scale with 8 inches travel with
.0001" resolution it would require 80,000 measurements and somehow
these measurements would need to be associated with the scale so that
the digital readout would show how far the scale had actually moved to
within .0001". Is this "mapping" something that could be easily and
cheaply handled a PIC and an Eprom? I hope the above was not too
vague.
Thanks,
Eric R Snow
Click to expand...
 
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