OK so the problem was the motor mounts. It seems like they transmitted vibrations into the frame. I installed some motor dampers today and everything got much better.

@chrishamm this solved it, thank you!

Just updated to RRF 3.1.1 and the behaviour stays the same.

Hi, I recently updated from RRF 3.0 to 3.1 and noticed the Board Reset / Emergency Stop via Web Interface now takes a lot longer than before. Also it seems like the software stack on the SBC restarts as well, causing a lost connection to the DWC for a few seconds. Is there a setting to adjust this behaviour? With 3.0 the board reset was done within like half a second and now it takes what feels like about 5 seconds. I have an Arduino connected to monitor the PS_ON pin and if its not connected for more than a second it switches the printer off. So now with RRF 3.1 every time I want to restart the board via the web interface my printer shuts off. If it there is a setting I can tweak to get the old behaviour back without having to reprogram my Arduino that would be great.

Yes, M569 V30 is set as well:

M569 P0.5
Drive 5 runs in reverse, active low enable, step timing fast, mode stealthChop, ccr 0x08053, toff 3, tblank 1, hstart/hend/hdec 5/0/0, pos 40, tpwmthrs 30 (125.0 mm/sec), thigh 200 (18.8 mm/sec)
M569 P0.3
Drive 3 runs in reverse, active low enable, step timing fast, mode stealthChop, ccr 0x08053, toff 3, tblank 1, hstart/hend/hdec 5/0/0, pos 776, tpwmthrs 30 (125.0 mm/sec), thigh 200 (18.8 mm/sec)
M569 P0.2
Drive 2 runs in reverse, active low enable, step timing fast, mode stealthChop, ccr 0x08053, toff 3, tblank 1, hstart/hend/hdec 5/0/0, pos 328, tpwmthrs 30 (62.5 mm/sec), thigh 200 (9.4 mm/sec)
M569 P0.0
Drive 0 runs in reverse, active low enable, step timing fast, mode stealthChop, ccr 0x08053, toff 3, tblank 1, hstart/hend/hdec 5/0/0, pos 328, tpwmthrs 30 (62.5 mm/sec), thigh 200 (9.4 mm/sec)

OK, I just confirmed Interpolation is working by temporarly changing it to I0 in M350 and the sound got even worse

Initial settings:

M115
FIRMWARE_NAME: RepRapFirmware for Duet 3 MB6HC FIRMWARE_VERSION: 3.1.0 ELECTRONICS: Duet 3 MB6HC v0.6 or 1.0 FIRMWARE_DATE: 2020-05-15b1 

M915
Driver 0.0: stall threshold 1, filter off, steps/sec 200 (8.0 mm/sec), coolstep 0, action: noneDriver 0.1: stall threshold 1, filter off, steps/sec 200 (16.0 mm/sec), coolstep 0, action: noneDriver 0.2: stall threshold 1, filter off, steps/sec 200 (8.0 mm/sec), coolstep 0, action: noneDriver 0.3: stall threshold 1, filter off, steps/sec 200 (16.0 mm/sec), coolstep 0, action: noneDriver 0.4: stall threshold 1, filter off, steps/sec 200 (40.0 mm/sec), coolstep 0, action: noneDriver 0.5: stall threshold 1, filter off, steps/sec 200 (16.0 mm/sec), coolstep 0, action: none

I tried increasing the H parameter for the stall detection with M915:

M915 P0.0:0.1:0.2:0.3:0.4:0.5 S3 H20000
M915
Driver 0.0: stall threshold 3, filter off, steps/sec 20270 (810.8 mm/sec), coolstep 0, action: noneDriver 0.1: stall threshold 3, filter off, steps/sec 20270 (1621.6 mm/sec), coolstep 0, action: noneDriver 0.2: stall threshold 3, filter off, steps/sec 20270 (810.8 mm/sec), coolstep 0, action: noneDriver 0.3: stall threshold 3, filter off, steps/sec 20270 (1621.6 mm/sec), coolstep 0, action: noneDriver 0.4: stall threshold 3, filter off, steps/sec 20270 (4054.0 mm/sec), coolstep 0, action: noneDriver 0.5: stall threshold 3, filter off, steps/sec 20270 (1621.6 mm/sec), coolstep 0, action: none

But I didn't notice any change in noise

Hi dc42 and thanks for the quick reply!

M350 Output:

Microstepping - X:16(on), Y:16(on), Z:16(on), E:16(on)

"(on)" means Interpolation is enabled or microstepping is enabled? I don't see interpolation specifically mentioned here.

I have tried adding the V30 parameter to the M569 commands for every drive but it doesn't seem to have any effect noise wise. The video is for a test "print" at 30mm/s speed.

About the M915 command I'm not sure. It is for stall detection, but at the moment I have no stall detection configured. You suggest I should set it up as well?

Hi guys,

I'm currently in the phase of building my first 3D printer and unfortunately the movements of the printer are very loud/digital sounding.

I am using a Duet 3 on RFF 3.1 with 24V power supply. One of the main points of this board for me was the "silent" stepper drivers.
I am very disappointed right now about the noise and hope it maybe is just a configuration issue?

This video shows the noise problem I have: https://youtu.be/O4xaL3oMB-Y

This is the config section for the motors:

I have played around with different microstepping and motor current values, but the noise only reduces a bit, but not significantly.

You guys have any idea what could be wrong here?