Duet conversion

Legrand

So, I've used the duet on a few (5 or 6) printers for several years, but it's been a while since I was in the nitty gritty of setting one up. I inherited an old delta and switched all the wiring over from the MKS setup. I can access the web portal and home the printer, but I cannot move the printhead. Any ideas on what might be going on here? Endstops seem to be correct, as it homes and the LED's light up upon homing.

; Configuration file for Duet WiFi (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.16 on Mon Jul 10 2023 14:44:47 GMT-0400 (Eastern Daylight Time)

; General preferences
M575 P1 S1 B57600 ; enable support for PanelDue
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"LargeDelta" ; set printer name
M665 R325 L247 B150 H260 ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0 ; put your endstop adjustments here, or let auto calibration find them

; Network
; M551 P"tigger1968" ; set password
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
M584 X0 Y1 Z2 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z80.00 E663.00 ; set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E1200.00 ; set maximum instantaneous speed changes (mm/min)
M203 X18000.00 Y18000.00 Z18000.00 E1200.00 ; set maximum speeds (mm/min)
M201 X1000.00 Y1000.00 Z1000.00 E1000.00 ; set accelerations (mm/s^2)
M906 X350 Y350 Z350 E650 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 Z0 S1 ; set minimum Z

; Endstops
M574 X1 S1 P"xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
M574 Z1 S1 P"zstop" ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin zstop

; Z-Probe
M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
M557 R85 S20 ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B1 S1.00 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S280 ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 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

; Custom settings are not defined

; Miscellaneous
T0 ; select first tool

DIY-O-Sphere

@Legrand said in Duet conversion:

; Axis Limits
M208 Z0 S1 ; set minimum Z

Most of the axis limits are missing......

droftarts

@Legrand almost certainly it’s your endstops:

 Endstops
M574 X1 S1 P"xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
M574 Z1 S1 P"zstop" ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin zstop

Your endstops are at the top, ie the maximum end of the axes, and you home to the top, so they should be X2 Y2 and Z2.

@DIY-O-Sphere that’s normal for a delta. The XY limit is defined as a circle, the radius of which is the B parameter in M665. So you only need Z in M208.

Ian

droftarts

@Legrand said in Duet conversion:

M665 R325 L247 B150 H260 ; Set delta radius, diagonal rod length, printable radius and homed height

A delta radius of 325 seems unlikely, it is generally only a bit bigger than the B value, and smaller than the L value. You probably have diameter rather than radius, so halve it. See my post here for guidance on setting these parameters: https://forum.duet3d.com/post/289874

Ian

DIY-O-Sphere

@droftarts said in Duet conversion:

@DIY-O-Sphere that’s normal for a delta.

Sorry, I missed that.....

Legrand

Changed to X2, Y2, Z2, LED's now illuminate when away from end stops, printer homes, but still cannot move axis.

droftarts

@Legrand Are you getting any error messages in the console? Generally you need to move down in Z first with a delta, you can't move X and Y at the top. The area you can move in is like a cone on top of a cylinder, because the axes would have to move past the homing point (and axis limit) to move in X and Y at the limit of Z.

Ian

Legrand

@droftarts Got it. It was the delta radius issue. I didn't think that would prevent the move, but, apparently it did. Thanks.

dc42

@Legrand said in Duet conversion:

@droftarts Got it. It was the delta radius issue. I didn't think that would prevent the move, but, apparently it did. Thanks.

Movement cannot be computed if the rod length is less than the delta radius.