Servo is cheeping very loud...

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Spartan117
Posts: 157
Joined: Mon Apr 11, 2022 3:37 pm
Acorn CNC Controller: Yes
Plasma CNC Controller: No
AcornSix CNC Controller: Yes
Allin1DC CNC Controller: No
Hickory CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Germany, Stuttgart

Servo is cheeping very loud...

Post by Spartan117 »

Hey guys,

i don't know if such things can be helped with via forum, but i try ;-)

I have 2 Leadshine L7P-400 / EL7-RS400P drivers with 2 ELM2H-0200LA60F Servo-Motors mounted on my lathe:

viewtopic.php?t=11657

400W, 23bit opical encoder, 230V, pretty high-quality

My problem is:
No matter what parameters i use, default, softer than default, one-click-tuning, simple-tuning, or after a first manual tuning... my Z-axis is cheeping like crazy! It really hurts in the ears, and is bothering extremely.

Is here anyone, who is really good in such things and who can tell me, what else i could try to quieten this axis?
It seems like the sound comes from the motor and ball screw, maybe the direct-driven and relatively long ball-screw makes it even worse.
The cheep is exactly at 8kHz, and only comes up when standing still. As soon as i try to spin the ballscrew in any direction, the cheeping stops.
If i move the axis a few mm via WMPG or keyboard, the cheeping gets louder or quieter sometimes, but not every time.

Does anyone know what i can do to at least quieten this a bit?
Here is a short video with audio
Fiepen.mp4
(1.19 MiB) Downloaded 3 times
Thank you,

Marc
German-speaking, so please be patient with my english-skills :)


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