Troubleshooting dual z axis sync

engikeneer

@chuymatt how exactly does it move? What is it doing/not doing?

When you connected the single motor to the Z-driver, did you put the jumpers on the other Z-header? There is a note about this on the duet wiring diagrams.

Also have you checked that both motors work okay/are wired up correctly? Try plugging them in to different drivers and checking they spin etc.

Do you get any errors come up when you try to move Z?

chuymatt

@JamesM
Would hat have made the y and x motors run hotter?

I have changed to 16 with interp.

Thanks!

This is my first reprap firmware printer and only my second printer overall.

chuymatt

@fcwilt I was banging my head against the wall for a while trying to get the corexy movement correct and this was what seemed to make commands have the intended effect. I'll admit I was flailing with that section.

chuymatt

@JamesM Oh. wow. So much faster. Also, homing is kinda scary now...

chuymatt

@engikeneer
Well... I moved on to the next aspect of my build after getting movement and the bltouch to work I neglected to put the jumpers back on. It is moving correctly now. Before, z1 was not moving anything. now they are both going at it.

Rookie mistakes.

chuymatt

Now z homing does not work correctly. X slams into the non-triggered side and then pingpongs back and forth on the y axis while the z is raising up. Super weird.

fcwilt

@chuymatt said in Troubleshooting dual z axis sync:

Now z homing does not work correctly. X slams into the non-triggered side and then pingpongs back and forth on the y axis while the z is raising up. Super weird.

Well you've got two Z motors and a BLTouch - correct?

At one point in your config file you had two endstops for Z but now it is one.

Are you using end stops (either 1 or 2) for homing Z or are you using the BLTouch.

In your bed.g M401 and M402 appear with the comment to remove if using BLTouch?

Since you appear to be using a BLTouch you should remove them.

Please post your home*.g files.

Frederick

chuymatt

@fcwilt I am using the BL touch only.

Thank you for taking the time to help.

It no longer pingpongs.

All


0:/sys/homeall.g
; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Wed Jun 24 2020 23:25:43 GMT-0700 (Pacific Daylight Time)
G91                   ; relative positioning
G1 H2 Z5 F18000        ; lift Z relative to current position
G1 H1 X-335 Y-335 F6000 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-335            ; home X axis
G1 H1 Y-335            ; home Y axis
G1 X5 Y5 F2800      ; go back a few mm
G1 H1 X-335 F360       ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-335            ; then move slowly to Y axis endstop
G90                   ; absolute positioning
G1 X55 Y25 F27000      ; go to first bed probe point and home Z
G30                   ; home Z by probing the bed

; Uncomment the following lines to lift Z after probing
;G91                  ; relative positioning
;G1 Z5 F100           ; lift Z relative to current position
;G90                  ; absolute positioning



CoreXY
Send code...
Status
Idle
Mode: FFF
Tool Position
X
0.0
Y
0.0
Z
0.00
Extruder Drives
Drive 0
0.0
Speeds
Requested Speed
0 mm/s
Top Speed
0 mm/s
Sensors
Vin
23.9 V
MCU Temperature
38.0 C
Z-Probe
0
 Tools
 Extra
 Control All
Tool	Heater	Current	Active	Standby
Hotend
T0 - Load Filament	Heater 1
active	207.9 C	
205
0
Bed	Heater 0
active	45.2 C	
60
0
Temperature Chart
System Directory


0:/sys/homex.g
; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Wed Jun 24 2020 23:25:43 GMT-0700 (Pacific Daylight Time)
G91              ; relative positioning
G1 H2 Z5 F6000   ; lift Z relative to current position
G1 H1 X-335 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 X5 F6000     ; go back a few mm
G1 H1 X-335 F360  ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000  ; lower Z again
G90              ; absolute positioning


0:/sys/homey.g
; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Wed Jun 24 2020 23:25:43 GMT-0700 (Pacific Daylight Time)
G91              ; relative positioning
G1 H2 Z5 F6000   ; lift Z relative to current position
G1 H1 Y-335 F6000 ; move quickly to Y axis endstop and stop there (first pass)
G1 Y5 F6000     ; go back a few mm
G1 H1 Y-335 F360  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000  ; lower Z again
G90              ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Wed Jun 24 2020 23:25:43 GMT-0700 (Pacific Daylight Time)
G91              ; relative positioning
G1 H2 Z5 F1000   ; lift Z relative to current position
G90              ; absolute positioning
G1 X100 Y-155 F1000 ; go to first probe point
G30              ; home Z by probing the bed

; Uncomment the following lines to lift Z after probing
;G91             ; relative positioning
;G1 Z5 F100      ; lift Z relative to current position
;G90             ; absolute positioning

fcwilt

Hi,

Glad to hear it is work.

I assume you cleaned up the config.g file?

Frederick

JamesM

@chuymatt You need to adjust the steps/mm appropriately after changing the microstepping. That is probably why it's moving so fast. So X and Y should be set at 80 and Z at 400

fcwilt

@JamesM said in Troubleshooting dual z axis sync:

@chuymatt You need to adjust the steps/mm appropriately after changing the microstepping. That is probably why it's moving so fast. So X and Y should be set at 80 and Z at 400

If M92 appears before M350 and M92 contains the correct values for 16x micro-stepping then any needed adjustments will be made for the values used in M350 if for some reason they are other than 16x micro-stepping.