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Hello,
Is anyone familiar with howto test a TRS drive? I finally have my spindle drive working and now 1 of my servo drives keep faulting out on OCP or OVC alarms. When the machine is first turned on it is stable for a few minutes. After that the y axis will start to get unstable and then it will kick out with the alarm. I swapped the AXO4 card to the x-axis and the error followed the card. I have the test procedure from Mitsu that tells you to check with a scope but I am not clear where to connect the ground for the pins.

Thanks for any help,
Cutmore

[Leelund]

Manual shows CH31,CH33, as well as anything labeled AG as AX04 analog ground. LG is the digital ground. CHB is the OCP Ground but a caution says that it should be used in conjunction with AG and LG.
HTH
Lee

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Thanks for the info,
So I guess any thing that is supposed to give a sign or triangle is considered analog, and the logic would be the digital?

Thanks,
Cutmore

[Leelund]

Don't know about signs or triangles. My job ended when the problem followed the board. It would be on it's way to Chicago.
Lee

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Lee,
Thank you for the reply,
In the manual some of the channels give sign waves and some give triangle or saw tooth waves. I am hoping to be able to find whether the card is adjusted right or not. I have not had this machine running for long and am working my way through it's issues 1 at a time.

Thanks,
Cutmore

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Hi,
Does anyone have any more info on the trs drives than what is available from the manual on the Mitsubishi site?

I have 1 drive that is faulting (ovc, sometimes and Ocp sometimes) I believe it is not adjusted right, as I have swapped a different AX04 in and that worked fine.

I also purchased a 2nd drive that was "supposed to be working. "
When I received it, Everything else I bought was on top of it and it doesn't work now. It has no signal in the triangular wave section.

thanks for any help,
Cutmore

[itmancnc]

Did you get help with the drive? If not, call Mitsubishi and get a simple procedure to check droop and gain.

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Thanks for the reply,
Do you mean the procedure that's in the TRS manual from Mitsubishi, Or is there something more available direct from them?

Regards,
Cutmore