Finding pinout of a servo encoder?

Apr 15, 2005 1 Replies

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colin

asume and asuming the info cant be found, if it was me id use my fluke 77's diode tester. puts out 1 ma I think, cant do much damage, a normal led would show up 2-3 volts. of course the sensor might be harder to determine what it is, maybe its a simple photo diode or photo…

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Glenn Ashmore 21 years ago

Building an XY stage with Buhler 1.13.043 servos salvaged from an old HP ink jet plotter. Documentation is nil. The encoders have 5 pins. There are two rows of holes on the disk, one coarse and the other fine, so I asume there are two sensors. How would you go about figuring out the pinout without doing any damage?

I am thinking that if I can find which pins go to the LED I can use the 'scope to figure out the output. I am reading 32 meg between pins 1 (+) and

4 (-) but that seems mighty high. All other combinations are open circuit.

Glenn Ashmore I\'m building a 45\' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com

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colin 21 years ago

asume

and

asuming the info cant be found, if it was me id use my fluke 77's diode tester. puts out 1 ma I think, cant do much damage, a normal led would show up 2-3 volts. of course the sensor might be harder to determine what it is, maybe its a simple photo diode or photo transistor or some integrated device if its fairly new.

Colin. =^.^=

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