Hey everyone,

   This is truly a shot in the dark, but I'll post it here anyway. I'm having trouble with my machine missing steps. Ill run a program about an hour long, and when the machine is done, it has lost its zero point by 10 to 20 thou. I have the pulses per rev set correctly so I know its not that. I am using optocouplers to convert a 12v signal to 5v signal. I'm wondering if anyone else has experience doing this and have they had trouble with missed pulses?

Jonathon

Hi Jonathon,
I would look for a mechanical issue first. I think if the controller or drive was out, it would be out all the time. Have a look for loose coupling/pulleys. Check all grub screws.


Alan

I had some funky stuff going on with my z axis encoder until I updated the firmware in my IP-A to .703. it was delivered with .700


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Did you get this solved Jonathon?
I think it is likely to be the optos, I certainly have no problems with 5v encoder outputs from the servo drives and I have very high encoder counts.

Hood