The Z axis rotating in wrong direction was due to stepper current being too low. Thanks for that pointer!
Running CoreXY. Tested with firmware 2.02RC4. First Z axis move after recombining is carried out extremely slowly. Regardless of F value or distance it takes about 30 seconds to complete. I can see all three z axis motors turning very slowly.
Yes, DuetWifi + Duex5. Upgraded today to:
Firmware Version: 2.02RC4(RTOS) (2018-11-18b5)
WiFi Server Version: 1.21
Web Interface Version: 1.22.5
Pulsing is better, but there is still one big pulse upon firmware Reset on the Fan/PWM and Extruder Heater outputs on the Duet5, that are tripping the SSRs connected those modules.
Thanks for info. Cluster size is 64K.
Just upgraded today to:
Firmware Version: 2.02RC4(RTOS) (2018-11-18b5)
WiFi Server Version: 1.21
Web Interface Version: 1.22.5
Will post again if it continues to occur.
Thanks 
The DuetWifi slows down and ultimately kicks out an error while uploading even small gcode files. The WIFI signal is strong at the computer and DuetWifi, which are just few feet apart. It seems to happen when there special characters in the file name (e.g. parentheses). Is there a limit to the length of the file name and are special characters allowed?
On firmware startup and after reset, the Fan PWM and Extruder heaters pulse and flicker many times. When using these to control other peripherals (e.g. lights, SSR) they peripherals all strobe 3-10 times at startup or upon reset. Is there any way to disable this pulsing of the FAN PWM and Extuder heater outputs? Thanks.
HI @dc42. Wondering if you had any further insight into this issue. Is it a firmware bug, or something with the configurations/gcode? Thanks.
@dc42 Adding M400 after M584 did not resolve the issue. In fact, adding M400 after the second M584 caused homez.g to hang.
homez.g
; Home 3 Independent Z-Axis Drives
M117 Homing Z axis...
M400 ; Wait for movement to stop
G91 ; relative positioning
M584 X0 Y1 Z2 U3 V4 E5 P5 ; separate Z axis motors. P5 to display/drive 5 axis.
M400 ; Wait for movement to stop
; The second time Homez is run, only the Z axis moves with this command (U and V do not move).
; Homez then hangs here for a couple of minutes, before continuing ...
G1 Z400 U400 V400 F500 S1 ; lower all z motors until each corresponding z-stop reached
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 V10 F200 S1 ; lower Z3 motor slowly until its endstop reached
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 U10 F200 S1 ; lower Z2 motor slowly until its endstop reached
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 Z10 F200 S1 ; lower Z1 motor slowly until its endstop reached
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
; This test move before combining axis works
G1 Z-5 U-5 V-5 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
M584 X0 Y1 Z2:3:4 E5 P3 ; Combine Z, U and V. P3 to display/drive 3 axis.
; Adding M400 here caused the homez.g to hang
;M400 ; Wait for movement to stop
; This test move after combining axis also works now
G1 Z-5 F200 ; test raise all axis slowly
M400 ; Wait for movement to stop
G90 ; absolute positioning
M400 ; Wait for movement to stop
M117 Homing Z axis done
Thanks for the suggestion @dc42, G91 is already there before the first M584 splitting the drives and before the G1 ZUV move in Homez.g, and the G90 is at the end.
Thanks @deckingman, appreciate your help and gave your suggestions a try this morning. Good to know that M584 returns the drive mapping. I changed the M584 to define all drives every time in config.g and homez.g.
After config.g M584 -> Driver assignments: X0 Y1 Z2:3:4 U3 V4 E5, 3 axes visible
After homez.g M584 -> Driver assignments: X0 Y1 Z2:3:4 U3 V4 E5, 3 axes visible
Behavior is still the same. Running Homez.g the first time after firmware reset and everything works as expected, with the Z, U and V axes rotating the same direction. But when Homez is run a second time, the first G1 Z400 U400 V400 F500 S1 command causes the Z axis to rotate in different direction from U and V. Homez then hangs for a couple of minutes before continuing on with the G1 V-3 F200 S2, and subsequent commands.
Also tried @phaedrux suggestion to enter commands individually from console. Did this after running homez once after reset. Same behavior. Checked drive mapping after the G1 Z400 U400 V400 F500 S1 and it returned Driver assignments: X0 Y1 Z2 U3 V4 E5, 5 axes visible
Its starting to look like a firmware bug. Upgraded to Firmware Version 2.01(RTOS) (2018-07-26b2). Now the 3 z-axis rotate in the correct direction after recombining Z, U and V. However, this only works the first time after firmware reset. If Home Z is run a second time, at the first G1 command, only the Z axis moves (U and V do not move).
homez.g
; Home 3 Independent Z-Axis Drives
M117 Homing Z axis...
M400 ; Wait for movement to stop
G91 ; relative positioning
M584 Z2 U3 V4 P5 ; separate Z axis motors. P5 to display/drive 5 axis.
; This only works the fist time after firmware reset.
; The second time Homez is run, only the Z axis moves (U and V do not move).
G1 Z400 U400 V400 F500 S1 ; lower all z motors until each corresponding z-stop reached
M400 ; Wait for movement to stop
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 V10 F200 S1 ; lower Z3 motor slowly until its endstop reached
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 U10 F200 S1 ; lower Z2 motor slowly until its endstop reached
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 Z10 F200 S1 ; lower Z1 motor slowly until its endstop reached
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
; This test move before combining axis works
G1 Z-5 U-5 V-5 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
M584 Z2:3:4 P3 ; Combine Z, U and V. P3 to display/drive 3 axis.
; This test move after combining axis also works now
G1 Z-5 F200 ; test raise all axis slowly
G90 ; absolute positioning
M117 Homing Z axis done
@phaedrux Thanks for your suggestions. I commented out the last M584 in homez.g and sent the following commands from the console:
M584 Z2:3:4 P3
G91
G1 Z-5 F200
Same thing. Drive 2 (Z) rotates in the correct direction, while drive 3 (U) and drive 4 (V) axes rotate the wrong way.
No change with commenting out M117 messages.
RepRapFirmware for Duet 2 WiFi/Ethernet version 2.0(RTOS) running on Duet WiFi 1.02 or later + DueX5
Thanks @deckingman for comparing to your configuration and homing files. I changed the second M584 to a freshly typed M584 X0 Y1 Z2:3:4 E5 P3 in both config.g and homez.g to recombine the axes. Added a test move G1 Z-5 U-5 V-5 F200 S2 after homing each axes individually and before combining the Z, U and V axes, and that works fine. The test move G1 Z-5 F200 immediately after combining the axes still does not work. During this move the Z2 axis rotates in the correct direction to raise the platform while at the same time the drive 3 (U) and drive 4 (V) axes are going the wrong way.
homez.g
; Home 3 Independent Z-Axis Drives
M117 Homing Z axis...
M400 ; Wait for movement to stop
G91 ; relative positioning
;M584 Z2 U3 V4 P5 ; separate z axis motors
M584 X0 Y1 Z2 U3 V4 E5 P5 ; separate Z axis motors. P5 to display/drive 5 axis.
G1 Z400 U400 V400 F500 S1 ; lower all z motors until each corresponding z-stop reached
M400 ; Wait for movement to stop
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 V10 F200 S1 ; lower Z3 motor slowly until its endstop reached
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 U10 F200 S1 ; lower Z2 motor slowly until its endstop reached
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 Z10 F200 S1 ; lower Z1 motor slowly until its endstop reached
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
; This test move before combining axis works
G1 Z-5 U-5 V-5 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
M584 X0 Y1 Z2:3:4 E5 P3 ; Combine Z, U and V. P3 to display/drive 3 axis.
; This test move after combining axis does NOT work (drives 3 and 4 are rotating in the wrong direction)
G1 Z-5 F200 ; test raise all axis slowly
G90 ; absolute positioning
M117 Homing Z axis done
Yes all 3 z-axis motors move together before homing. Tested with this sequence:
M564 H0
G91
G1 Z-5 F200 S2
Each z motor independently moves to its corresponding endstop. However once the 3 z-axis are recombined the combined z-movement fails.
config.g
; Three Z-Axis Motors on DuetWifi, Z1-Motor=Drive 2, Z2-Motor=Drive 3, Z3-Motor=Drive 4
; Three Z-Axis Endstops on DuetWifi. Z1-Endstop=Z-Stop, Z2-Endstop=E0-Stop, Z3-Endstop=E1-Stop
M400 ; wait for movement to stop
; Main board
M569 P0 S1 ; Drive 0 (X) goes forwards
M569 P1 S1 ; Drive 1 (Y) goes forwards
M569 P2 S0 ; Drive 2 (Z) goes backwards
M569 P3 S0 ; Drive 3 (E0) goes backwards
M569 P4 S0 ; Drive 4 (E1) goes backwards
; Expansion board
M569 P5 S1 ; Drive 5 goes forwards
M569 P6 S0 ; Drive 6 goes backwards
M569 P7 S0 ; Drive 7 goes backwards
M569 P8 S0 ; Drive 8 goes backwards
M569 P9 S0 ; Drive 9 goes backwards
; Assign Drive Axis, Motors, Endstops
M584 X0 Y1 Z2 U3 V4 E5 ; Assign Drive # and Axis to Motors (X=0, Y=1, Z1-Motor=Z2, Z2-Motor=U3, Z3-Motor=V4, Extruder1=5)
M574 X1 Y2 Z2 U2 V2 S0 ; set endstop config for X, Y separately (X=1 low position, Y=2 high position, S0=switch active low)
; Configure Steps and Speeds
;M350 X16 Y16 Z16 U16 V16 E16 I1 ; Configure microstepping with interpolation
M92 X80 Y80 Z400 U400 V400 E190 ; set axis steps/mm
M906 X1500 Y1500 Z2000 U2000 V2000 E1400 I100 ; Set motor currents (mA)
M201 X2000 Y2000 Z200 U200 V200 E4000 ; Maxumum Accelerations (mm/s^2)
M203 X33000 Y33000 Z1000 U1000 V1000 E10000 ; Maximum Speeds (mm/min)
M566 X600 Y600 Z20 U20 V20 E950 ; Maximum jerk speeds mm/minute
; Configure axis dimensions and z-axis lead screw locations
M208 X300 Y300 Z400 U400 V400 ; set axis maxima
M208 X0 Y0 Z0 U0 V0 S1 ; set axis minima
;M671 X346.37:346.37:-38.64 Y354.62:-25.39:164.62 S1.2 ; leadscrew positions relative to X=0, Y=0 (right rear, right front, left middle) (S=max correction in mm)
M584 Z2:3:4 P3 ; Combine Z, U and V, P3 to display/drive 3 axis.
homez.g
; Home 3 Independent Z-Axis Drives
M117 Homing Z axis...
M400 ; Wait for movement to stop
G91 ; relative positioning
M584 Z2 U3 V4 P5 ; separate z axis motors
G1 Z400 U400 V400 F500 S1 ; lower all z motors until each corresponding z-stop reached
M400 ; Wait for movement to stop
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 V10 F200 S1 ; lower Z3 motor slowly until its endstop reached
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 U10 F200 S1 ; lower Z2 motor slowly until its endstop reached
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
G1 Z10 F200 S1 ; lower Z1 motor slowly until its endstop reached
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 Ignore endstops and ignore axis not homed)
M400 ; Wait for movement to stop
M584 Z2:3:4 P3 ; combine z axis motors
G1 Z-5 F200 ; test raise all axis slowly
G90 ; absolute positioning
M117 Homing Z axis done
Adding M400 to wait for motors to stop before M584 command did not work. Raising and lowering before recombining axis works fine, but once the axis are recombined with M584 Z2:3:4 P3, the G1 Z-5 F200 S0 command only moves one of the 3 Z-motors.
oops, typo ... when the three axis are recombined the three z-motors do NOT move together.
RepRapFirmware for Duet 2 WiFi/Ethernet version 2.0(RTOS) running on Duet WiFi 1.02 or later + DueX5
Using the Duex5 for the extruder E5.
The 3 motors are moving separately in homez.g to align the z-motors. at the endstops. Each z-motor stops independently when the build platform reaches that z-motors corresponding limit switch endstop.
I had previous set it up with Drivers 5,6,7 on the Duex5 for the three z-motors and the behavior was exactly the same.
Setup up a DuetWifi with three independent z-axis motors connected to stepper drivers Z-Motor, E0-Motor and E1-Motor, each with its own lower endstop switch connected to Z-stop, E0-stop and E1-stop. After firmware reset the platform lowers, homes to each endstop switch independently, and raises independently. But when the three axis are recombined the three z-motors do move together. What am I missing?
config.g
; Assign Drive Axis, Motors, Endstops
M584 X0 Y1 Z2:3:4 U3 V4 E5 P3 ; Assign Drive # and Axis to Motors (X=0, Y=1, Z1-Motor=Z5, Z2-Motor=U6, Z3-Motor=V7, Extruder1=3)
M574 X1 Y2 Z2 U2 V2 S0 ; set endstop configuration (X low, Y high, Z/U/V high; all endstop switches active low)
M906 X1500 Y1500 Z1500 U1500 V1500 E1500 I100 ; Set motor currents (mA)
M208 X300 Y300 Z400 U400 V400 S0 ; set axis maxima
M208 X0 Y0 Z0 U0 V0 S1 ; set axis minima
; Configure Steps and Speeds
;M350 X16 Y16 Z16 U16 V16 E16 I1 ; Configure microstepping with interpolation
M92 X80 Y80 Z400 U400 V400 E95 ; set axis steps/mm
M203 X30000 Y30000 Z1000 U1000 V1000 E10000 ; Maximum Speed (mm/min)
M201 X2000 Y2000 Z300 U300 V300 E4000 ; Acceleration (mm/s^2)
M566 X600 Y600 Z40 U40 V40 E950 ; Max instantaneous speed change (mm/min)
homez.g
; Home 3 Z-Axis Drives
M117 Homing Z axis...
G91 ; relative positioning
G1 Z400 F500 S1 ; lower all z motors until z-stop reached
M584 Z2 U3 V4 P5 ; Re-assign Z Drives, P5 to drive/show axis (Z1-Motor=Z2, Z2-Motor=U3, Z3-Motor=V4)
G1 Z-3 F200 S2 ; raise Z1 axis slowly (S2 required to move individual motors)
G1 U-3 F200 S2 ; raise Z2 axis slowly (S2 required to move individual motors)
G1 V-3 F200 S2 ; raise Z3 axis slowly (S2 required to move individual motors)
G1 Z10 U10 V10 F200 S1 ; lower all z motors slowly until each endstop reached
G1 Z-10 U-10 V-10 F200 S0 ; raise platform
M584 Z2:3:4 P3 ; Combine axes and stop drive/show axis (P3)
G1 Z-10 F500 S0 ; test raise platform
G90 ; absolute positioning
M117 Homing Z axis done