Duet 3 mini 5+ screeching noise when moving stepper motors

Phaedrux

Please post your full config.g as well. If you're using an ancient config you found online it's unlikely to be updated for 3.4.1.

Ray.R

@phaedrux That makes sense. 20220628_180132.mp4 here is a quick video of the noise generated by the board (only when the stepper motors are active). My current configuration
; Configuration file for Duet 3 Mini 5+ (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Jun 26 2022 16:52:21 GMT-0700 (Pacific Daylight Time)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"CETUS MK3" ; set printer name

; Network
M551 P"" ; set password
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0.0 S1 ; physical drive 0.0 goes forwards
M569 P0.1 S1 ; physical drive 0.1 goes forwards
M569 P0.2 S1 ; physical drive 0.2 goes forwards
M569 P0.3 S1 ; physical drive 0.3 goes forwards
M584 X0.0 Y0.1 Z0.2 E0.3 ; set drive mapping
M350 X32 Y32 Z32 E32 I1 ; configure microstepping with interpolation
M92 X180.00 Y180.00 Z180.00 E690.00 ; set steps per mm
M566 X900.00 Y900.00 Z600.00 E600.00 ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z12000.00 E7200.00 ; set maximum speeds (mm/min)
M201 X150.00 Y150.00 Z150.00 E800.00 ; set accelerations (mm/s^2)
M906 X400 Y400 Z450 E1200 I10 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X180 Y180 Z175 S0 ; set axis maxima

; Endstops
M574 X2 S1 P"io5.in" ; configure switch-type (e.g. microswitch) endstop for high end on X via pin io5.in
M574 Y2 S1 P"io6.in" ; configure switch-type (e.g. microswitch) endstop for high end on Y via pin io6.in
M574 Z2 S1 P"io2.in" ; configure switch-type (e.g. microswitch) endstop for high end on Z via pin io2.in

; Z-Probe
M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:165 Y15:165 S50 ; define mesh grid

; Heaters
M140 H-1 ; disable heated bed (overrides default heater mapping)
M308 S0 P"temp0" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out1" T0 ; create nozzle heater output on out1 and map it to sensor 0
M307 H0 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H0 S300 ; set temperature limit for heater 0 to 300C

; Fans
M950 F0 C"out3" Q500 ; create fan 0 on pin out3 and set its frequency
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out4" Q500 ; create fan 1 on pin out4 and set its frequency
M106 P1 S0 H1:0 T45 ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 F0 ; define tool 0
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

Phaedrux

Does the sound stop when you de-energize the motors with M84?

They are starting up in Spreadcycle mode, you can try switching them over to stealthchop mode. That will likely drop the idle noise, but you'll have to configure the speed to switch over to spread cycle again.

I think it's likely just the way those motors are going to work with these drivers.

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Motors_tuning

Take a look there, specifically the M569 portion where you'd set spreadcycle and stealthchop.

Ray.R

@phaedrux yes it does. I will try to implement that into my printer thank you very much for the help. Just out of curiosity, why does the noise happen from this board? I've ran the machine with its original mainboard, as well as a Mellow Fly E3, and they both sounded alot better in this situation. Is it the stepper motors or something?

Phaedrux

They may be using stealthchop by default.

Ray.R

@phaedrux I enabled stealth chop and its still making the noise, albeit more quite but, it is still significantly louder than expected.

deckingman

@ray-r Why are the motor currents for XY and Z only one third of the current for the extruder? We could really do with knowing the specification of the motors.

deckingman

@ray-r Also, having only 10% holding current on 400 mA means it'll be 40mA which will do next to nothing in terms of holding position. Set it to 50% and see if that makes any difference to the sound you hear.

Ray.R

@deckingman I would to provide information on the stepper motors but, unfortunately there is no information on these stepper motors. I already looked online for the model number/manufacturer but there is no info. Ill add a picture of the stepper motor for reference.

Ray.R

@phaedrux So what are my options here? Do i need to replace the stepper motors or is this going to happen with any system that I plug into the Duet 3?

deckingman

@ray-r Are the model numbers the same on the axes motors as the extruder? If they are, then it would reasonably safe to assume that you could make the motor current the same for all of them - i.e. increase it to 1200mA. I'm not saying it will cure your problem, but it might.

Ray.R

@deckingman they are essential with slight variations to there model number. For instance the y stepper motor end in 01N instead of 02N and the Z is 03N. The stepper motor current is set so high on the extruder is because I'm using the orbiter V1.5 and that's there recommended current usage. I will try to up the current and see if that helps.

dc42

@ray-r looking at your config.g file I see that you have the X, Y and Z motors set to the same steps/mm (M92), maximum speed (M203) and acceleration (M201). From photos I find on the web it appears to me that the Cetus 3D is a Cartesian printer with a leadscrew-driven Z axis. If that's the case then the Z axis will almost certainly have a higher steps/mm than X and Y, and it will need a lower maximum speed and acceleration; so I am not surprised that the Z motor screeches when you try to move it.

Ray.R

@dc42 I don't think that is true, or at least not for the one that I have. My printer is on linear rails driven by a belt. That goes for all axis'. I originally modeled my config file off of CNC Kitchen's config for his Cetus, https://youtu.be/WcPyujDF2eU, video for reference. It still gave me the loud noise when operating the stepper motors. I will try to lower the speed and acceleration. Hopefully that works. Thank you all for the help.

nikscha

I also have a Cetus MK2, and I have the same problem.

I just switched from a Duet2 Wifi to a Mini5+, and suddenly the Y motor makes a nasty screetching noise. The other motors are fine, and before, when the Duet wifi was running things there was also no noise.

I've experimented with different current values, with microstepping and interpolation and with tuning stealthchop, but so far nothing helped. Any ideas?

droftarts

@nikscha The Duet 2 WiFi is set to spreadCycle continuously. You could try running it in spreadCycle on the Mini 5+, and to avoid coil whine have it switch to stealthChop when stationary (set changeover speed at below the jerk value). The spreadCycle on the Mini 5+ is different from the Duet 2; they use different drivers, and different versions of spreadCycle.

Are the other axes noisy? What happens if you swap motors over?

Ian