delta Z motor goes clunk, regardless of motor or driver
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It occurred to me to check some other input shapinng:
M593 P"zvd" F37
clunks more softly and at different movements: in the 1200 acceleration case (which clunks under zvddd other than 12-26) it clunks for movements above xval=22M593 P"zvdd" F37
clunks intermediately loudly, but at different movements: in the 1200 acceleration case (which clunks under zvddd other than 12-26) it clunks other than xval=8-24So I also tried varying teh frequency
M593 P"zvddd" F74
andM593 P"zvddd" F18
both clunk and not-clunks differently toF37
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@achrn Thanks. I've raised an issue for this on Github: https://github.com/Duet3D/RepRapFirmware/issues/1015
Ian
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Hello. I have a duet2Wifi Delta. Have the same problem after update on 3.5.2, 3.5.3 Release Candidate 1 problem too. When I switch off input shaping M593 P"none" all axis moving without clunk.
Do you have solve for this bug? -
@SPAX thanks for your report.
TBH although it appears that there is a bug in this area, we might not fix it for the following reasons:
- Input shaping has been completely reimplemented 3.6 than in 3.5 and works much better. We have no reports of a similar bug in 3.6.
- It's likely that tracking this bug down would require substantial effort, which ultimately would be wasted because the 3.6 code is completely different.
- Delta printers typically have little or no need for input shaping because their resonant frequencies tend to be higher.
Of course, if anyone else tracks this down and supplies a fix that we can validate, we will gladly include it in a future 3.5.x release.
If you are brave enough then I suggest you try RRF 3.6.0-alpha.5 on your machine. Or you can wait for 3.6.0-beta.1 which I estimate is 2 weeks away.
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@dc42 Hello!
I updated firmware to 3.5.4 and have same problem still... -
@SPAX Please try RRF 3.6.0-beta.2: https://github.com/Duet3D/RepRapFirmware/releases/tag/3.6.0-beta.2
Ian
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Please try 3.6Beta3 to confirm if the issues is resolved or not
https://forum.duet3d.com/topic/37289/software-version-3-6-0-beta-3-now-available
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@achrn @SPAX I've gone back and tested this 'Delta clunking' issue. I set up a 6HC with 3.5.3 and reproduced the clunking, updated to 3.6.0-beta.4 and reran, no clunking. I don't think we're planning on fixing this in 3.5.x, as IS has been rewritten in 3.6.
If you're facing this issue in 3.5.x, it can be resolved by turning off input shaping.
Ian
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@T3P3Tony said in delta Z motor goes clunk, regardless of motor or driver:
Please try 3.6Beta3 to confirm if the issues is resolved or not
https://forum.duet3d.com/topic/37289/software-version-3-6-0-beta-3-now-available
Apologies for the long delay to get back to this. I didn't try any of the betas, but I've done some multiple test cases now with 3.6.0-rc.1 and no clunks for any case. I've only tried ZVDDD input shaping (that's what I was using that clunked), but I have tried varying the other things that seemed to influence it and not triggered anything untoward.
Thanks.
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@achrn I can confirm that I have also ZVDDD configured on a 3.5.4 delta, and also have some clunks issues.
Will update this afternoon to 3.6 RC and test