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Topic: Measure distances in mm (Read 10992 times) previous topic - next topic


I can't use that type of things you just mentioned because the wood is always "runing" on the machine...


[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]


Yes, that's the kind of thing I was thinking of.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


A webcam to measure thicknesses??

yup - u would need to do some image processing...
the machine parts (in the background) should have a much different color than the wood pieces...
how fast do those pieces pass the sensor? less than 25Hz?


That Sharp sensor would work form me the minimal distance is the problem, i need 0.8 mm and for what i've seen they don't have that kind of sensors.
Do you think that this would work?

Check the ZADM 034
(ParCon, analog output)



the specs look good...
the accuracy is much better than u need: 50um...


Yes i know but do you think it is hard to connect it and make readings with arduino?


it seems to b easy:
1. connect 12V to it...
2. connect wires for the output like this:
GNDsensor-----------------------wire#1-------------------100R(or similar)-----------------------wire#2-------------------OUTPUTsensor
3. calibrate the arduino (i would use the INTERNAL ADC ref, which should give u reproducible results at the same temperature/voltage):


It has a current loop output so you need to calculate your load resistor cairfully. Also there is a 4mA output minimum so you will get a fixed offset voltage. Given that you might have to do some messing about withan op amp to give you the full range of the A/D.

However have you looked at the price of this? I can't see one which is never a good thing. I would expect this to be in excess of £200.


I've send email today requesting price still waiting for response.


Check the ZADM 034

I was about to mention these - they are basically close range LIDAR devices. I can guarantee you they -will not- be cheap. Grumpy Mike is probably right on target (if you can even find a distributor that will sell to the public and only sell you one of them)...
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

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