Duet 3 Mini noisy StealthChop + no sensorless homing

gloomyandy

M569 P0 should show you what speed a switch from stealthchop to spreadcycle will take place. Not sure if the speeds you are using will trigger the switch or not.

Argo

@gloomyandy

With
M569 P0.0 S1 V34 ; Drive 0 goes forwards: X Axis

I get:
Drive 0 runs forwards, active low enable, timing fast, mode stealthChop, ccr 0x00053, toff 3, tblank 0, tpwmthrs 34 (110.3 mm/sec), pwmScaleSum 34, pwmScaleAuto 2, pwmOfsAuto 207, pwmGradAuto 18, pos 776

Homing is set to F3800 = 63,33 mm/s

In theory this should work?

Veti

to disable hybrid mode set V to 0

gloomyandy

Looks like it should be staying in stealthchop for the homing move.

Things you might try...

Lower the X and Y current before the homing move. You also don't seem to ever be restoring the current back to 100%.
What happens if you set a very low stall threshold with something like M915 X S-63 F0 H200 R0, do the motors stall then?

Veti

@Argo said in Duet 3 Mini noisy StealthChop + no sensorless homing:

M92 X200.00 Y200.00 Z400.00 E415.00 ; Set steps per mm

if you have 1.8 degree stepper this should be X100 Y100

Argo

@gloomyandy

Ah I lowered the currents for testings. Normally I set them back to 100%.
I'll try lower settings now.

@Veti
My bad, thanks for pointing that out. I had 0.9 motors in my Duet Wifi. Argh

Veti

@Argo
do you where running twice the speed. thats where the noise could have come from

Argo

Thank you guys again

With the beta version from the Dropbox archive + correct steps settings and lower sensitivity + no hybrid mode, it's working now and the motors are really quiet.

Veti

the real beta 1 is here
https://github.com/Duet3D/RepRapFirmware/releases/tag/3.3beta1
not on dropbox

Argo

@Veti

Are those versions the same? dc42 posted in the thread you linked that it's an unofficial beta build. Idk if he means not for public or it's just because it's a beta.

Veti

3.3 beta 1 was release 12 days ago.
the dropbox link was from 21.january.

if its not in beta 1 then that would be good to know, in case he forgot to merge the bugfix.

dc42

The bug fix is in the official 3.3beta1 release. The builds currently on Dropbox are later.

Veti

@dc42
its not in the changelog

dc42

@Veti said in Duet 3 Mini noisy StealthChop + no sensorless homing:

@dc42
its not in the changelog

Thanks for pointing this out. It is now.