I narrowed it down, and this happens to this axis only whenever I write M17 after start up? (with the 8x microstepping ON)

I am trying to change one of the motors to change from 16x microstepping to 8x microstepping. It works for 16x microstepping, but when I try to change it to 8x microstepping, the motor moves once, very quickly in the opposite direction, then fails to move for any following commands due to a position tolerance issue. Once suppressing the position tolerance issue, the motor works fine, but this jerking motion occurs upon every restart of the mainboard.

I am using a Duet3D 6HC mainboard with M23CL motors.

M569 P73.0 S0 R1
M569.1 P73.0 T3 R100 I0
M569 P73.0 D4



M584 X70.0 Y71.0 Z72.0 U73.0 V74.0 E75.0
M350 X16 Y16 Z16 U16 V16 I1
M92 X640 Y640 Z1969.23077 U34.188034 V27.350427
M350 U8 I1

When I comment out the last M350 U8 I1 command, it works fine. I also tried changing the microstepping in the first M350 command as well as in M92, but that didn't work either.

This worked! It was the homing issue G92. Thank you!

@droftarts Apologies for that, I am fairly new to this. Below is an updated output from the diagnostic command, and attached is the config.g file.

M122 B71.0
Diagnostics for board 71:
Duet M23CL firmware version 3.5.2 (2024-06-10 13:23:16)
Bootloader ID: SAME5x bootloader version 2.8 (2023-07-25)
All averaging filters OK
Never used RAM 45108, free system stack 202 words
Tasks: EncCal(1,nWait 6,0.0%,469) Move(3,nWait 7,0.0%,174) CLSend(3,nWait 6,0.0%,147) HEAT(2,nWait 6,0.0%,117) CanAsync(5,nWait 4,0.0%,66) CanRecv(3,nWait 1,0.0%,79) CanClock(5,nWait 1,0.0%,64) TMC(4,nWait 6,0.0%,397) MAIN(1,running,97.5%,303) IDLE(0,ready,0.0%,29) AIN(2,nWait 2,2.5%,255), total 100.0%
Owned mutexes:
Last reset 00:05:30 ago, cause: software
Last software reset data not available
Driver 0: pos 0, 80.0 steps/mm, not tuned/calibrated, SG min n/a, mspos 0, reads 0, writes 0 timeouts 0, steps req 0 done 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0, segs 0, step errors 0, maxLate 0 maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0, ebfmin 0.00 max 0.00
Peak sync jitter -15/4, peak Rx sync delay 185, resyncs 0/0, no timer interrupt scheduled
VIN voltage: min 11.9, current 11.9, max 11.9
V12 voltage: min 10.4, current 10.4, max 10.5
MCU temperature: min 26.3C, current 26.5C, max 26.7C
Last sensors broadcast 0x00000000 found 0 8 ticks ago, 0 ordering errs, loop time 0
CAN messages queued 2674, send timeouts 0, received 1670, lost 0, errs 0, boc 0, free buffers 38, min 38, error reg 0
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 0
Closed loop driver 0 mode: closed loop, pre-error threshold: 2.00, error threshold: 4.00, encoder type rotaryAS5047, position -5801
Encoder reverse polarity: no, full rotations -1, last angle 10583, minCorrection=0.0, maxCorrection=0.0, agc 66, mag 4695, no error
Tuning mode: 0, tuning error: 0x2, collecting data: no
Control loop runtime (us): min=5726621, max=1, frequency (Hz): min=750000, max=0

config.g

; Default config.g template for DuetPi
; Replace this with a proper configuration file (e.g from https://configtool.reprapfirmware.org)

; Display initial welcome message
; M291 P"Please go to <a href=""https://www.duet3d.com/StartHere"" target=""_blank"">this</a> page for further instructions on how to set it up." R"Welcome to your new Duet 3!" S1 T0

G4 S2 ; Wait for expansion boards to start


; Setup X axis motor
M569.1 P70.0 T3 ; Assign magnetic encoder
M569 P70.0 D4 S1 ; Assign closed loop control and forward movement
M584 X70.0 ; Set motor to X axis control
M906 X1000 ; Set current limit

; Setup Y axis motor
M569.1 P71.0 T3 ; Assign magnetic encoder
M569 P71.0 D4 S1 ; Assign closed loop control and forward movement
M584 Y71.0 ; Set motor to Y axis control
M906 Y1000 ; Set current limit

; Setup V axis motor
M569.1 P74.0 T3 ; Assign magnetic encoder
M569 P74.0 D4 S1 ; Assign closed loop control and forward movement
M584 V74.0 ; Set motor to X axis control
M906 V1000 ; Set current limit

M17 ; Allow motors to move

I just realized that the other two motors I setup were 2407B00010 but this one that is not working is 2402B00021. I can't find on Google how this makes a difference (they look identical).

I am facing an issue getting a new M23CL motor to calibrate/move. I have attached pictures with the sequential commands I ran on this motor.

Following these same commands, I successfully set up two other motors using the same cables/connectors/setup, just swapping out the motor.

I've powered things up/down a few times, I updated the firmware of the mainboard (3.5.2) and of the motor (3.5.2), and tried resetting CAN on the motor; none to any avail.