Quote:
Originally posted by lendaddy
I took the cover off and checked for continuity from the board to the control box and it's good. We are checking with unico on creating a signal via a device and trigger to "fool" it but the guys here think that will be expensive and difficult...we'll see.
Here is a brief on the read-head. It is the non-guide quatrature TTL type.
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From this I don't think it is a problem on the sensor head. Those 8 pins you mentioned would be the 4 different coil used to pick up the changes in magnetic field. They are what generates the A & B (also C & D exactly opposite of A & B) signals. I think that you have a problem somewhere on the circuit boards.
Because this is a TTL system, they are doing some processing before feeding an output to the motor. It should be very easy to "fake" the signal depending on the timings. It did not show from this picture the frequency of these signals. I could calculate it from the 025 code shown if I knew the speed of the head. (Is this fixed or changing?)
For example, the 025 code is 25cycles/mm. If the speed was 1mm/sec (really slow), then the frequency would be 25cycles/sec or 25 hertz. All the other signals seem to be a phase shift (time delay) of the same frequency. Then if you knew the pattern that the motor is looking for when the registration mark is found, you could recreate this using a simple micro-controller.
Good luck. I hope that you can get this working. I wish I was closer and could lend more of a hand. I love trying to engineer a workaround.