Tune Servos

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Old_machinist
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Tune Servos

Post by Old_machinist »

I have gotten the cart in front of the horse I think.
I have Gecko G320X servo drives installed and working.
They have not been tuned at all. That is, I did not change any pots from the initial factory settings before I installed them.
I had planned to tune them with an oscilloscope, but installed the drives and started testing before the oscilloscope was available.
I can get an oscilloscope now, but it looks like I need to disconnect servos from the mill in order to do so?
What would be my easiest way to tune these now that the machine is together and running?
Other than I would like to improve on my rapid performance, the machine seems to be running fine.
I could just disconnect the belts to test, so not too much back stepping I am thinking?

What would be your approach?

Charles Hopkins
martyscncgarage
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Location: Mesa, AZ

Re: Tune Servos

Post by martyscncgarage »


Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
Old_machinist
Posts: 21
Joined: Sun Apr 26, 2020 10:45 am
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Re: Tune Servos

Post by Old_machinist »

Thanks Marty
I have looked at the videos you referred me to and they are both testing on the bench.
I was actually hoping that the load of moving the table would do for tuning with an oscilloscope? I guess I will give that a try and if flopping around on a wood work bench is a requirement, I can always remove them and proceed as with the video.
I don't have the oscilloscope so this is just trying to plan my approach. I can't imagine anyone being too comfortable loaning out their oscilloscope so I don't want to keep it too long.
I will let you know how I make out.

Charles
Old_machinist
Posts: 21
Joined: Sun Apr 26, 2020 10:45 am
Acorn CNC Controller: Yes
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CNC Control System Serial Number: 3160
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: Tune Servos

Post by Old_machinist »

I received an answer from Marcus Freimanis from Geckodrive, Inc.

He wrote" Yes, you can tune them while attached to the machine but the machine will mechanically dampen then motors, making tuning a bit harder. The machine will soften any bad motor behavior; you typically want it unconnected because the tuning is more nuanced than you will typically see with it attached to the machine."
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