Dual Z Axis: 1 motor lowers and raises mid print
theory last edited by theory
Hello! Glad to join this community. I have a DIY CoreXY with Duet WiFi and I'm experiencing a hiccup.
2 independent Z axis stepper motors, leadscrews, and endstops. Both Z motors home fine, both z endstops trigger as intended.
After it homes and it starts printing, one motor lowers and raises the bed on the one side. I do not have Z Hop enabled, the printer worked fine when I had a single motor setup. I moved to a dual z motor setup and this behavior happened immediately.
Has anyone seen this type of behavior?
; Configuration file for Duet WiFi (firmware version 1.20 or newer)
; executed by the firmware on start-up
; generated by RepRapFirmware Configuration Tool on Tue Jun 19 2018 23:32:40 GMT-0400 (Eastern Daylight Time)
; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M555 P1 ; Set firmware compatibility to look like RepRapFirmare
M667 S1 ; Select CoreXY mode
M550 PL3-37 ; Set machine name
M552 S1 ; Enable network
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet
M584 X0 Y1 Z2:4 U4 E3 P3
M574 X1 Y1 Z1 U1 S0 ; Set active low endstops
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes
M569 P2 S0 ; Drive 2 Z goes forwards
M569 P3 S0 ; Drive 3 goes backwards
M569 P4 S1 ; Drive 4 Z goes backwards because of flipped wiring connector
M350 X16 Y16 Z16 U16 I1 ; Configure microstepping with interpolation
M350 E8 I0 ; Configure E axis microstepping to x8 with interpolation OFF
M92 X160 Y160 Z400 U400 E2111 ; Set steps per mm
M566 X300 Y300 Z24 U24 E6 ; Set maximum instantaneous speed changes (mm/min)
M203 X7200 Y7200 Z180 U180 E2400 ; Set maximum speeds (mm/min)
M201 X500 Y500 Z250 U250 E120 ; Set accelerations (mm/s^2)
M906 X1430 Y1430 Z1000 U1000 E400 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout
; Axis Limits
M208 X0 Y0 Z0 U0 S1 ; Set axis minima
M208 X325 Y325 Z400 U400 S0 ; Set axis maxima
M140 H-1 ; Disable heated bed
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S300 ; Set temperature limit for heater 1 to 300C
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on
M563 P0 D0 H1 ; 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
; Automatic saving after power loss is not enabled
; Custom settings are not configured
Can you post your homeall and slicer start gcode as well so we can get a better idea what state the printer is actually in when a print is started?
one motor lowers and raises the bed on the one side.
Do you mean it goes up and down constantly? Can you post a video showing what you mean?