I'm using a digital input to resume a program. just a bunch of proximity switches connected in series. problem with proximity switches is that if a part is a little bent or bowed it doesn't trigger switch. So i want to replace it with a light curtain / area sensor from automation direct. These sensors trigger the digital output when only one light is dark, ( not adjustable ) but the analog is 0v - 10v proportional to lights blocked. so that would work, but my robot doesn't have analog inputs. A DQSC355A has analog inputs but it's pretty expensive. Is there another unit I could use? Also thinking of just using an Arduino programmed to trigger a Do when Ai=<9.6v. could do that for $20 but then its not as simple to adjust the analog voltage required to trigger. of course anythings possible if your fluent enough programming Arduino. My Robot operator is familiar with it but not sure just how familiar.
Analog unit
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Lauyder -
December 13, 2021 at 5:18 PM -
Thread is Unresolved
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Is the cell controlled by a PLC? Or is this robot standalone?
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It's standalone
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Well, the bargain-basement approach would be to breadboard up some op-amps and dial in the gain resistors.
Going the more industrial route, there are industrial-grade "trigger" devices that will accept an analog input and output a 0V or 24V signal depending on what range the analog input falls into. I've used one or two in the past, but I don't have a brand or part number on tap.
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Simple Question:
- do you want to save money?
- do you want safety?
My suggestion:
make a risk analysis
check with the regulations of your Country
Not following the law can be expensive and end in jail
For safety there are a lot of commercial devices around -> check them out (only suggetion)
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Its not a safety device. its to detect if enough parts are present so the program can resume
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A Limit Alarm is the type of device I was thinking of.