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Drives Shutting Off


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I am experiencing an issue with the drives shutting off while changing probes (approaching the rack in the Y-axis). The probe head is usually inside of the rack when the drive shut off. However, the alignment of the rack seems good. The probe is not touching the sides of the rack slot. When the drives shut off, I can see light between the probe puck and the rack.

Also, the drives turn off occasionally while measuring a part. The probe is not in contact with the part when the drives shut off.

If I run the machine at 70% speed or less, these issues seem to resolve. Any ideas? Perhaps the head needs an adjustment (vibration dampening)? Could the head be sensing some pressure while pushing the probe rack sliders? But it doesn't really make sense that the drives also shut off while traversing the part (not touching anything)...
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Check the status window when this happens, there will almost certainly be an error message which may make identifying the specific issue more feasible. However based on your description of symptoms it certainly appears that you would need a Zeiss service tech to work on the system
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Yes, we had a service person come out last week. He was not able to identify the problem. He has not seen it before. He said is going to order 3 different parts and test them all. I thought I would post here to see if anyone else has experienced this issue.

The error is usually "488 CAN device" followed by "CMM drives off."

Sometimes the error is "4 Travel command rejected, motor output stage not ready" followed by "CMM drives off."
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Unfortunately that is a relatively generic error, so doesnt really point us to anything specific other than a Hardware issue. The only way to diagnose will be to do as the Service tech is doing and test the possible culprits to find which fixes the issue
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  • 4 months later...

I know I am very late to this topic.  How long have you had your probe rack in that exact position?  This is a common error when there is wear on the drives.  When you mentioned that is runs fine at a slower speed, that is also a symptom of this issue.  If your rack has been in the same exact position for years, moving it ~0.5" in the Y axis should resolve this issue.  I have worked with customers that had the same thing also happened with fixtures and with reference spheres that are permanently set in the same place on the machine for years.  It's hard to replicate and test because it is such a small area that is worn which triggers the error.  

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Thank you.  It will shut off no matter where it begins the move from on the table. I can manually remove a system at the front of the table, send it for an automatic stylus system load and it shuts off. Staying below 200mm per sec seems to work fine!

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