Indramat 3TRM2 driver

Hello everybody,

I am heaving problem with my Indramat 3TRM2 driver ( manual ).

The Axis2 dc motor oscillates back and forward rapidly when 0V dc control voltage is applied. If I apply some DC voltage, the motor rotates, but still oscillates (changes its velocity). Please see tacho signal at 0V control signal (attachment1)

The Axis1 has the same dc motor, which runs fine and smooth. I exchanged the motors of axis 1 and 2, and the problem moved to motor1 and the motor2 ran smooth. So I assume the problem lies in the controller, not the motor/tacho.

Than i noticed the chapter 3.7 (in the manual), that is describing the exactly the same behaviour - the problem seems to be the pre-current setting. I did as described - I short the TP103 and measure TP114:
- on Axis1 (which runs fine) i get a constant -0,7V.
- on Axis2 (which oscillates) i get the signal which seems just fine and which i was expecting to see on axis1 (attachment2).

Does anybody have an idea what could cause the motor oscillation?
Does anybody have an idea why am i getting such signals form TP114 and TP214.
The trimmer potentiometers (P201, P203) were not touched and are still glued/marked to factory settings.

Any advice and suggestions will be greatly appreciated,
Regards
Klemen

Heh, I found the solution, it is described in paragraph 2.9. I don't know why they split this section to two parts.

This thread can be deleted,
Regards
Klemen

Ok, a attached the before and after oscilloscope image, maybe someone will find it useful.
Regards
Klemen

Hi
I came across a Maho MH600C last week and it followed me home...

Its equipped with the same Indramat drive, any chance you can attach the file again, the link seems to be broken opr not available anymore. Thanks in advance

henk

The file is too big to upload to the forum. I uploaded it here: docdro.id/qwMiB7x

Thanks
Much apreceated

Henk

Helo,

I have a MAHO600E cnc. It was porly retrofitted with some smc boards (act like step/dir to analog converters), and I have an issue like you had. My Z axis make the same oscillation. Can you please write down in details how exactly did you solved it? If I understand correctly, maybe I have to adjust some kind of bias on R103. I have a scope, but not fully understand what was the solution for you, and what I have to do...

Hello,

It was quite some time ago, so cannot remember all the details how i did it. But i i think it can be understood from reading this forum thread. Please see the manual - the link still works Especially section 2.9 and 3.7.

You can also see the solution from my before/after oscilloscope photo.

Regards

Thanks for the fast response. I have read the manual, but there are some questions what I need to understand. You have tested it in place, it is need to be taken out, and bench test it, whit power supply? If I need to take it out, do I need to connect a motor to the end, or I can test it without any load? I have a spare complet indra unit, so probably it is faster to exchange them, but I would like to understand what happened with the original one, and if it can be fixed, without spending a fortune, it would be nice to have a spare.

Thank you!