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A contour checker...

H

Howhurley

I am designing an inexpensive contour checker for machined parts
coming out of a lathe. I want to use a simple laser distance finder
with a 0-10 VDC output, and a small toothed belt driven stepper motor
to position the laser sensor along a delrin linear bearing.

The stepper motor will receive a move command, a certain time to
settle will pass, and a sensor reading will be taken. This will
repeat 10-15 times for a 4-6 inch part, and compare the input to
existing data in a lookup table (multiple parts are programmed in)

The analog readings are taken, and if they are within a certain
percentage of the "taught" values, the part passes.

I could use a micro plc, (perhaps a Mitsubishi) but am looking to do
this in a low cost method.

If anyone is able to read my ramblings, and can decipher my thoughts,
I'd like to hear your thoughts.
 
R

Robert Baer

Howhurley said:
I am designing an inexpensive contour checker for machined parts
coming out of a lathe. I want to use a simple laser distance finder
with a 0-10 VDC output, and a small toothed belt driven stepper motor
to position the laser sensor along a delrin linear bearing.

The stepper motor will receive a move command, a certain time to
settle will pass, and a sensor reading will be taken. This will
repeat 10-15 times for a 4-6 inch part, and compare the input to
existing data in a lookup table (multiple parts are programmed in)

The analog readings are taken, and if they are within a certain
percentage of the "taught" values, the part passes.

I could use a micro plc, (perhaps a Mitsubishi) but am looking to do
this in a low cost method.

If anyone is able to read my ramblings, and can decipher my thoughts,
I'd like to hear your thoughts.
The best contour checker is the eye looking at a tit (or two).
 
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