Whaaaaa???

[Greg Fill]

Mariss instead of writing your reply in the post reply box use the post reply button on the last message to respond and attach the file through the enhanced menu. A cross coupled SET - RESET FLIP FLOP by any chance? I wonder how it will respond to the poor pulses.

I.J Just wait until I start asking all my questions....ACME screw 1 start, 2 start , 4 start what is better and so on. I think I will be the one getting confused. I really have to stop designing the electronics for my machine and get on with the mechanics but electronics is fun as well.

[Mariss Freimanis]

OK, let's see if this works. My circuit is a little more bizzare than a flip-flop. It counts every edge (X4 decode).

Mariss

[Greg Fill]

Thanks Mariss, I finally got around to your diagram. Yes I see what you are doing. It will work with an optical sensor but not the stepper motor encoder. Unlike an optical sensor once you stop turning the motor the quadrature outputs will both go back high (or low depending on how you have wired the circuit). When you stop turning an optical sensor the quadrature outputs will stay high or low depending on the wheel position. The 4X decoding is not necessary for the motor encoder as I actually slow the decoding down depending on how fast you turn the motor. The best solution for the motor encoder is a simple micro. Noisy motor pulses in is resolved to STEP/DIR and JOG A and JOG B outputs.

Greg