Hello fellow printer(er?)s,
I've build a new Cartesian style printer and am trying to control it with a Duet 2 Wifi. All is well until I try and control the Z-motors. Trying to home with different acceleration and speed settings, none of them result in actual movement on the Z-axis. I do get a holding torque on them (motors). After several attempts to home with different settings the system eventually starts spamming the Error: short-to-ground by driver(s) 2. This error keeps being spammed until the idle time has run out (30sec in my case). Now this board is already a replacement board because the previous one had the exact same problem on the Z axis. For some reason the X and Y are fine.
Both Z-axis motors are being tested without any load on them, nothing is mechanically connected on them. All motors in my system are the same type, for all axis. Connecting the Z-motors on different drivers (X, Y) work without a problem, they start turning as expected.
I'm getting the suspicion the boards I'm receiving are experiencing a hardware failure of some sort on the driver(s). Help is greatly appreciated as I think my supplier isn't going to send yet another board.
Some specs:
Duet 2 Wifi FW v2.03
42HE3D-A1 motors: 1.7A 1.8deg (Dual Z-motor)
24VDC power supply (not a single under voltage alarm)
2mm pitch spindles on all axis (=1600 steps/mm)
Board mounted in a PETG 'box' on standoffs and a fan blowing from underneath
Config.g:
; Configuration file for Duet WiFi (firmware version 2.03)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.0.5 on Tue Oct 29 2019 21:06:11 GMT+0100 (Midden-Europese standaardtijd)
; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Getting-it-done" ; set printer name
; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet
; Drives
M569 P0 S1 ; physical drive 0 goes forwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S1 ; physical drive 3 goes forwards
M569 P4 S1 ; physical drive 4 goes forwards
M584 X0 Y1 Z2 E3:4 ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation
M92 X1600.00 Y1600.00 Z1600.00 E420.00:420.00 ; set steps per mm
M566 X100.00 Y100.00 Z100.00 E10.00:10.00 ; set maximum instantaneous speed changes (mm/min)
M203 X250.00 Y250.00 Z250.00 E100.00:100.00 ; set maximum speeds (mm/min)
M201 X100.00 Y100.00 Z100.00 E25.00:25.00 ; set accelerations (mm/s^2)
M906 X500 Y750 Z1000 E500:500 I30 ; 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 X300 Y300 Z300 S0 ; set axis maxima
; Endstops
M574 X1 Y1 S0 ; set active low and disabled endstops
; Z-Probe
M574 Z1 S2 ; set endstops controlled by probe
M307 H3 A-1 C-1 D-1 ; disable heater on PWM channel for BLTouch
M558 P9 H5 F120 T12000 ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 X15:250 Y15:250 S50 ; define mesh grid
; Heaters
M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M305 P1 T100000 B3988 R4700 ; set thermistor + ADC parameters for heater 1
M143 H1 S280 ; set temperature limit for heater 1 to 280C
; Fans
M106 P0 C"Part" S0 I0 F500 H-1 ; set fan 0 name, value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 C"Hotend" S0 I0 F500 H1 T50 ; set fan 1 name, value, PWM signal inversion and frequency. Thermostatic control is turned on
; Tools
M563 P0 S"extruder 0" D0 H1 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
M563 P1 S"extruder 1" D1 H1 F0 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C
; Custom settings are not defined