Duet 3 3 z motors config

mattbaker

Help needed.

I am trying to set up a core xy with 3 z motors. And I think I have sent myself insane trying to set it up. Not much point posting my config files as I have edited it so many times, I go cross eyed trying to figure out what I have done. But nothing has worked so far.

So if any of you kind people could share your config etc files, so I could compare to what I have, I would really appreciate it.

TIA

Matthew

droftarts

@mattbaker Are you using a Duet 3 6HC with 3HC expansion board? What seems to be the problem?

Ian

Veti

@mattbaker said in Duet 3 3 z motors config:

I am trying to set up a core xy with 3 z motors.

normally you do not need to do more than add the extra motors to the M584 line like
M584 X0 Y1 Z2:4:5 E3

current acceleration etc. is the same for all z motors

see this article for more information and extra stuff
https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors

droftarts

@mattbaker One of the gotchas on Duet 3 wiring is that the motor driver layout:

2 3
1 4
0 5

not

2 5
1 4
0 3

See:

Make sure the motors are plugged into the right headers!

Ian

mattbaker

Ive wired the steppers correctly, found that one out the hard way.

I'm trying to get the 3 axis levelling working.

mattbaker

@droftarts I'm trying to get the 3. axis levelling working. I'm using the Duet 3 6HC. without the expansion board at present.

droftarts

@mattbaker Okay. See the link @Veti posted earlier. You need the following for bed levelling with 3 independent Z motors:

to know which motor driver links to which leadscrew, eg Z2 is front left, Z3 is back centre, Z4 is front right
Leadscrew position defined by M671, in the order the leadscrews are defined by M584!
Change bed.g to probe as near as possible to each leadscrew

For details, see https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors#Section_Example_for_3_motors

Ian

mattbaker

Ive gone back through it and changed the config however I keep getting g30: some computed corrections exceed limit of 5.00.

Ive tried changing the limit, you see in some videos distances of 20+ mm, and it just seems to get ignored.

M671 X480:230.0:-30 s100 Y460.0:-40:460 S100

Nuramori

@mattbaker your m671 doesn’t look right.

Here’s mine. For reference the order of the z axis motors are one on the left is motor one, motor on the back right is two, motor on the front right is the third. All commands are listed/referenced with that order. I also always include a pin map in the beginning of my config.g as an easy reference.

; Configuration file for Duet3 (firmware version 3.0 RC2)
; executed by the firmware on start-up
;
; --------------- Pin/connection Mapping Legend -------------------
; out0 - Bed heater
; out1 - Extruder 1 heater
; out2
; out3
; out4 - Radiator cooling fan - WC heatsink
; out5
; out6
; out7
; out8 - Parts cooler on printhead
; out9 - Duet board cooling fan
; out4.tach - Radiator cooling fan rpm wire - WC heatsink
; out5.tach
; out6.tach
; io0.in
; io1.in - X min active low endstop switch
; io2.in - Y max active low endstop switch
; io3.in - Z probe type to bltouch - DEPRECATED
; io4.in - Z probe type to PIEZO
; io5.in - Emergency stop switch
; io6.in
; io7.in
; io8.in
; io0.out
; io1.out
; io2.out
; io3.out - GPIO port 0 on IO3, servo mode - BLTouch Z-Probe
; io4.out
; io5.out
; io6.out
; io7.out
; io8.out
; servo, out10 (only on v0.5, not on v0.6)
; pson
; spi.cs0
; spi.cs1
; spi.cs2
; spi.cs3
; temp0 - Bed Thermistor
; temp1 - PT1000 for extruder 1
; temp2 - PT1000 for pi4
; temp3
; mcu-temp - MCU sensor
;
; -----------------------------------------------------------------
;
; General preferences

G4 P2000 ; Hold your Horses.
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
G21 ; Set units to Millimeters
M550 P"DUET3" ; set printer name

M584 X0.3 Y0.2 Z0.0:0.1:0.4 E0.5 ; set drive mapping to each axis
M669 K1 ; Select CoreXY mode - New format

; Network
M552 S1 ; enable network
M552 P192.168.3.120 ; Static IP Address
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0.0 S0 ; physical drive 0 goes backwards - Z Axis Left (1)
M569 P0.1 S0 ; physical drive 1 goes backwards - Z Axis Right Back (2)
M569 P0.2 S0 ; physical drive 2 goes backwards - Y Axis
M569 P0.3 S0 ; physical drive 3 goes backwards - X Axis
M569 P0.4 S0 ; physical drive 4 goes backwards - Z Axis Right Front (3)
M569 P0.5 S1 ; pyhsical drive 5 goes forwards - Extruder 1

; Set up three Z-axis location
M671 X-52.5:377.5:377.5 Y162.5:282.5:42.5 S5 ; leadscrews at 1 - left, 2 - rear right and 3 - front right

M92 X200.00 Y200.00 Z400.00 E1800 ; set steps per mm
M350 X16 Y16 Z16 E16 I1 ; configure micro-stepping with interpolation
M566 X1000.00 Y1000.00 Z400.00 E240.00 ; set maximum instantaneous speed changes (mm/min)
M203 X24000.00 Y24000.00 Z2000.00 E1200.00 ; set maximum speeds (mm/min)
M201 X10000.00 Y10000.00 Z400.00 E800.00 ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E800 I30 ; set motor currents (mA) and motor idle factor in percent*100
M572 D0 S0.074 ; Set pressure advance
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X320 Y320 Z350 S0 ; set axis maxima

; Endstops

M574 X1 S1 P"io1.in" ; X min active high endstop switch
M574 Y2 S1 P"io2.in" ; Y max active high endstop switch

; Z-Probe - BLTouch - DEPRECATED
; M574 Z1 S2 ; set endstops controlled by probe
; M558 P9 C"^io3.in" H3 F60000 T10000 ; set Z probe type to bltouch and the dive height + speeds (bltouch NEEDS pullup)
; G31 P10 X28.5 Y-5 Z2.35 ; set Z probe trigger value, offset and trigger height

; Z-Probe - PIEZO
M574 Z1 S2 ; set endstops controlled by probe
M558 P8 C"io4.in" H5 F1000 T20000 ; set Z probe type to PIEZO and the dive height + speeds
G31 P10 X0 Y0 Z-0.1 ; set Z probe trigger value, offset and trigger height

G30 ; Probe Z

; Configure Heaters and Sensors
M308 S0 P"temp0" Y"thermistor" A"Bed Temp" T100000 B3950 ; Configure bed temperature sensor
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"pt1000" A"Extruder 1 Temp" ; Configure extruder 1 temperature sensor - PT1000 sensor
M143 H1 S280 ; set temperature limit for heater 1 to 280C
M308 S2 P"mcu-temp" Y"mcu-temp" A"Duet Board" ; Configure MCU sensor
; M308 S4 P"temp2" Y"pt1000" A"RPI" R2200 ;Pt1000 temp sensor for the raspberry pi

; Define Sensors and Fans
M950 H0 C"out0" T0 ; Define heater 0 (bed heater) - bed_heat pin and Temp Sensor 0
M950 H1 C"out1" T1 ; Define heater 1 (hot-end E0) to use the "e0_heat" pin and Temp Sensor 1

;Set PID values
M307 H0 A253.9 C566.2 D1.0 V23.3 B0 ; disable bang-bang mode for the bed heater and set PWM limit
M307 H1 A855.8 C368.4 D5.7 V23.3 B0 ; disable bang-bang mode for the extruder heater and set PWM limit

M950 F0 C"out8" Q100 ; Define Fan_0 for use - Parts Cooler on Printhead - 4010 fan
M950 F1 C"!out4+^out4.tach" Q25000 ; Define Fan_1 for use - Radiator cooling - WC heatsink. - PWM fan
M950 F2 C"out9" Q25000 ; Define Fan_2 for use - Duet board cooling fan
; M950 S0 C"io3.out" ; Define GPIO port 0 on IO3, servo mode - BLTouch Z-Probe - DEPRECATED

; Fans
M106 P0 S0 ; set fan 0. Parts Cooler on Printhead
M106 P1 T25:40 H2 ; Set fan 1. Manages Radiator fan for water-cooled loop.
M106 P2 T35:50 H2 ; Set fan 2. Manages Duet board fan.

; Tools
M563 P0 S"Extruder 1" D0 H1 F0 ; define tool 0. Fan 0 operates with an active hot-end
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C

; Emergency Stop
M574 S1 P"^!io5.in" ; Define Emergency endstop - emergency stop switch condition
M581 P"io5.in" T0 ; Define action to be taken with activation of emergency stop switch

; Miscellaneous
T0 ; select first tool
M501 ; Store parameters

mattbaker

@Nuramori Thanks for your help. I uploaded new files from the configurator, changed a few things, which I thought is what I had, and problem solved.

No idea what the problem was, looks the same to me, but I'm not going to look a gift horse in the mouth.