I am trying to install a laser micrometer. it measures the diameter of a wire as the wire passes through it, and records if/when the wire goes out of tolerance (too large/too small). The micrometer needs a footage pulse input for this. This is usually accomplished by installing a rotary reed switch between terminals 8 & 9. The reed switch will pull the 5V terminal 8 LOW (draws 10mA when closed) and the laser micrometer registers this as a pulse. There is no reed switch currently in place and I am trying to avoid adding one by using an already in-place 12V encoder signal. The encoder signal currently goes to a footage counter mouned right next to the micrometer so logistically it's easier. I can't figure out how to do it. I tried using a transistor but it didn't work. please have a look:
The thing in the top right is an exploded view of the encoder, which is shown in the top left terminated at the existing counter. White & green correspond to Data A & B. Black & red correspond to +VDC & common. Black lines correspond to what's already in place, and blue lines correspond to my addition.
transistor is 2N3416
The thing in the top right is an exploded view of the encoder, which is shown in the top left terminated at the existing counter. White & green correspond to Data A & B. Black & red correspond to +VDC & common. Black lines correspond to what's already in place, and blue lines correspond to my addition.
transistor is 2N3416
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