Author Topic: missing encoder pulses with the ip-a  (Read 1890 times)

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Offline jofriedl

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missing encoder pulses with the ip-a
« on: December 23, 2015, 01:20:38 AM »
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

Offline Alan XR8

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missing encoder pulses with the ip-a
« Reply #1 on: December 23, 2015, 03:37:48 AM »
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

Offline LM941

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missing encoder pulses with the ip-a
« Reply #2 on: January 16, 2016, 08:02:59 PM »
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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Offline Hood

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Re: missing encoder pulses with the ip-a
« Reply #3 on: January 17, 2016, 05:38:41 AM »
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