I think it is amazing that you have installed an Duet wifi in a printer that cost almost the same as the duet
Looking foward to see then end result.

@deckingman your time to shine

Finally to the point where im satisfied.

Biggeste change was changing to BL touch - After I got my hands on an thermal/IR camera, I could see that the bed was like a mirror for the camera, so that's why the IR probe didn't work good enough

Biggest limitation? My imagination and understanding of the Gcode commands -

Other than that:
Missing stealth chop on the duet wifi, but spready cycle is okay -
12V fans on a 24V setup is only possible with external hardware (duex5 or an regulator)

For a small retrofit, I would go for the Duet Maestro, unless the print is complex (multiple extruder, multiple motors for auto leveling Z, etc.)

I use the paneldue, but 90% of my work is done through the web interface.

That is beautiful! looking foward to see print quality if it is as pretty as the printer

rectilinear infill? try grid instead

@plasticmetal said in Duet Wifi limitations - what are your experiences?:

@martin1454 said in Duet Wifi limitations - what are your experiences?:

12V fans on a 24V setup is only possible with external hardware (duex5 or an regulator)

Just to clarify, the external hardware is simply to supply the 12V. It can be a $3 buck regulator from eBay or Amazon. A wiring example is here.

Yup - A small buck converter is enough - or if it is a small low power fan like the 30mm E3D, a linear 7812 is also fine.

@Veti
Increased the current to 1200 - still gets the large offset

@Veti said in G29 / 3 point bed compensation - always tilted slightly:

@Martin1454 said in G29 / 3 point bed compensation - always tilted slightly:

M574 Z0 ; Set endstop Z to be probe

thats not the command for Set endstop Z to be probe
this is
M574 Z1 S2 ; configure Z-probe endstop for low end on Z

M308 S0 P"temp2" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M308 S1 P"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp2

Your thermistor is configured incorrectly. Find the correct Beta value in your thermistor documentation.

M906 X1200 Y1200 Z800 E800 I40 ; set motor currents (mA) and motor idle factor in per cent

are these correct? what stepper motors do you have?

The motors are all E3D high torque motors rated at 1.6A, except the extruder which is a small pancake stepper - current seems okay on it - Will look into the thermistors and change it from M574 Z0 to Z1 S2

EDIT: I got the Z0 from the Gcode page
"The S2 option of M574 is intended for use only when axes other than Z are using the Z probe for homing. The only printers known that do this using Duet electronics are the RepRapPro Ormerod, Huxley Duo, and Mendel Tricolour machines. When using the Z probe to home Z, M574 Z0 should be used."

@Veti
This is the complete config.g

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Oct 12 2020 17:14:31 GMT+0200 (Centraleuropæisk sommertid)

; General preferences
G90                                          ; send absolute coordinates...
M83                                          ; ...but relative extruder moves
M550 P"Duet 3"                               ; set printer name
M669 K1                                      ; select CoreXY mode

; Drives
M569 P0.1 S1                                 ; physical drive 0.1 goes forwards
M569 P0.2 S1                                 ; physical drive 0.2 goes forwards
M569 P0.3 S0                                 ; physical drive 0.3 goes forwards
M569 P0.4 S0                                 ; physical drive 0.4 goes forwards
M569 P0.5 S0                                 ; physical drive 0.5 goes forwards
M569 P0.0 S0                                 ; physical drive 0.0 goes forwards
M584 X0.2 Y0.1 Z0.4:0.3:0.5 E0.0             ; set drive mapping
M350 X16 Y16 Z16 E16 I1                      ; configure microstepping with interpolation
M92 X200 Y200 Z800.00 E415.00           	 ; set steps per mm
M566 X1500.00 Y1500.00 Z12.00 E120.00        ; set maximum instantaneous speed changes (mm/min)
M203 X8400.00 Y8400.00 Z4000.00 E1200.00      ; set maximum speeds (mm/min)
M201 X800.00 Y500.00 Z200.00 E250.00          ; set accelerations (mm/s^2)
M906 X1200 Y1200 Z800 E800 I40                 ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                      ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                             ; set axis minima
M208 X300 Y250 Z480 S0                       ; set axis maxima

; Endstops

M574 X1 S3                                                          ; Set endstops controlled by motor load detection
M574 Y1 S3                                                          ; Set endstops controlled by motor load detection
M574 Z0 															; Set endstop Z to be probe
M915 X Y H200 S1 R0 F0						 						; set X and Y to sensitivity , do nothing when stall, unfiltered

; Z-Probe

M558 P9 C"^io7.in" H5 F100 T6000             ; set Z probe type to bltouch and the dive height + speeds
M950 S0 C"io7.out"                           ; create servo pin 7 for BLTouch
G31 P500 X30 Y70 Z1.48                          ; set Z probe trigger value, offset and trigger height
M557 X40:300 Y80:195 S30                     ; define mesh grid

; Define the X and Y coordinates of the leadscrews.
; Must come after M584 (Set drive mapping), M667 (Select CoreXY Mode) and M669 (Choosing Kinematics type)
; Motor order: Front right (1), front left (2), rear center (3).
; Snn Maximum correction in mm to apply to each leadscrew (optional, default 1.0)
M671 X-55:360:360.0 Y170:40:310 S20 P2

; Heaters
M308 S0 P"temp2" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0                           ; create bed heater output on out0 and map it to sensor 0
M140 H0                                      ; map heated bed to heater 0
M143 H0 S120                                 ; set temperature limit for heater 0 to 120C

M308 S1 P"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp2
M950 H1 C"out1" T1                           ; create nozzle heater output on out1 and map it to sensor 1


; Fans
M950 F1 C"out7" Q500 L127 C"Heat sink"             ; create fan 1 on pin out7 and set its frequency
M106 P1 H1 T45                             ; set fan 1 value. Thermostatic control is turned on

M950 F0 C"out4" Q500                         ; create fan 0 on pin out4 and set its frequency
M106 P0 H-1 C"Part cooler"            ; set fan 0 value. Thermostatic control is turned off

; 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

M501;											Read config override

@Veti

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Oct 12 2020 17:14:31 GMT+0200 (Centraleuropæisk sommertid)

; Z-axis
G91               		 ; relative positioning 
M561                     ; Clear any bed transform
G1 X160 Y170 F6000	     ;
G30						 ;

@Veti said in G29 / 3 point bed compensation - always tilted slightly:

@Martin1454

in the start g code.

G28
G32
G28 Z

So I tried that, but that gives me a fun offset.

I removed G32 from Homeall and Homez - Then homed all axis from the DWC, and then sent manually G32 and then G28 Z. Then I probed the bed with G29

@Veti said in G29 / 3 point bed compensation - always tilted slightly:

@Martin1454

i would advise not to have the G32 in the homez, as the G32 invalidates z=0.

while analysing change the 3 point with points close to the leadscrews.

Where would you place G32 then?

@Veti said in G29 / 3 point bed compensation - always tilted slightly:

@Martin1454 said in G29 / 3 point bed compensation - always tilted slightly:

F300

With a bltouch, you need to probe slower F120 is a better value.

post you bed.g and your homeall.g

if you have 3 leadscrews why are you probing 5 points?

Aha, will lower that then.

I probe 5 points as I got a bit better results with that, even though I know only 3 points is needed to define a plane.
But if it only needs 3 points with the right setting, it would be perfect!

here is the 2 files:

; bed.g
; called to perform automatic bed compensation via G32
M561; Clear bed height map 
; Probe the bed at 5 points
G30 P0 X30 Y80 Z-9999;
G30 P1 X30 Y260 Z-9999; 
G30 P2 X280 Y260 Z-9999; 
G30 P3 X280 Y80 Z-9999;
G30 P4 X135 Y160 Z-9999 S3;

; homeall.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Oct 12 2020 17:14:31 GMT+0200 (Centraleuropæisk sommertid)
G91               ; relative positioning
M400 			  ;
M913 X40 Y40 	  ; Drop current to 70%
G1 H2 Z5 F500    ; lift Z relative to current position
G1 H1 X-325 F6000 ; move quickly to X axis endstop and stop there (first pass)
G1 X5 F6000       ; go back a few mm
G1 H1 X-325 F1000  ; move slowly to X axis endstop once more (second pass)
G90               ; absolute positioning
M913 X100 Y100	  ; return current to 100%
; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Oct 12 2020 17:14:31 GMT+0200 (Centraleuropæisk sommertid)
G91               ; relative positioning
M400 			  ;
M913 X40 Y40 	  ; Drop current to 70%
G1 H1 Y-325 F6000 ; move quickly to X axis endstop and stop there (first pass)
G1 X5 F6000       ; go back a few mm
G1 H1 Y-325 F1000  ; move slowly to X axis endstop once more (second pass)
G90               ; absolute positioning
M913 X100 Y100	  ; return current to 100%


; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Oct 12 2020 17:14:31 GMT+0200 (Centraleuropæisk sommertid)

; Z-axis
G91               		 ; relative positioning 
M561                     ; Clear any bed transform
G1 X30 Y80  F6000	     ;
G30						 ;
G32                      ; Start 3-point probe sequence - Bed.g

EDIT: here is first probe with F100:

So my issue is that I have a COREXY printer with 3 independent leadscrews, a bed with PEI sheet on it, and a BL touch probe. Whenever Im homing the printer, 1 corner is always a bit lower than the rest - The corner towards home XY (0,0) is alway low, and maximum XY (320,290) always sits high.

If I run it more than once, it gets better, but since its alway off on first try around the same, I would suspect it be possible to fix it with better settings - But I cannot figure out the math in what seting is wrong.
Here you can see the probe tests:

And the bed results after 1 homing:

Then 2 homing:

And then 3 homing:

As seen, the lower left corner is a bit low.

The most relevant of the settings gcode is here:

; Z-Probe

M558 P9 C"^io7.in" H5 F300 T6000             ; set Z probe type to bltouch and the dive height + speeds
M950 S0 C"io7.out"                           ; create servo pin 7 for BLTouch
G31 P500 X30 Y70 Z1.48                          ; set Z probe trigger value, offset and trigger height
M557 X40:300 Y80:195 S30                     ; define mesh grid

; Define the X and Y coordinates of the leadscrews.
; Must come after M584 (Set drive mapping), M667 (Select CoreXY Mode) and M669 (Choosing Kinematics type)
; Motor order: Front left (1), front Right (2), rear right (3).
; Snn Maximum correction in mm to apply to each leadscrew (optional, default 1.0)
M671 X-55:360:360.0 Y170:40:310 S20 P2

The bed is shaped like this, where the red is the leadscrews:

The coordinates from the screws have been measured by homing the printer, then moving the nozzle as close to the leadscrew, and measure the offset with a ruler.

My guess is one of the coordinates is offset, but I cannot figure out which one

@achrn Just tested, it seems so! thanks for the help everyone

@achrn

Well, If I set the hot end temperature by DWC, the fan turns on at the 45 degree mark, but If I try start a print from cold state, it doesnt turn on, even if the hot end reaches 200 degrees

here is the first layer from sli3cr PE

; generated by PrusaSlicer 2.2.0+win64 on 2020-11-22 at 14:32:01 UTC

; 

; external perimeters extrusion width = 0.45mm
; perimeters extrusion width = 0.45mm
; infill extrusion width = 0.45mm
; solid infill extrusion width = 0.45mm
; top infill extrusion width = 0.40mm
; first layer extrusion width = 0.42mm
M80;
M107
M190 S60 ; set bed temperature and wait for it to be reached
M104 S220 ; set temperature
G28 ; home all axes
G1 Z5 F5000 ; lift nozzle
M109 S220 ; set temperature and wait for it to be reached
G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0
; Filament gcode
G1 Z0.350 F7800.000
G1 E-2.00000 F3000.00000
G92 E0
G1 X134.903 Y117.482 F7800.000
G1 E2.00000 F3000.00000
G1 F1800.000
G1 X135.970 Y116.731 E2.06547
G1 X137.161 Y116.216 E2.13063
G1 X138.439 Y115.953 E2.19610
G1 X159.076 Y115.922 E3.23179
G1 X160.185 Y116.021 E3.28762
G1 X161.258 Y116.311 E3.34345
G1 X162.265 Y116.785 E3.39929
G1 X163.173 Y117.427 E3.45512
G1 X163.956 Y118.218 E3.51095
G1 X164.588 Y119.134 E3.56678
G1 X165.050 Y120.146 E3.62261
G1 X165.329 Y121.223 E3.67844
G1 X165.415 Y122.245 E3.72992
G1 X165.408 Y142.572 E4.75004
G1 X165.291 Y143.516 E4.79778
G1 X165.034 Y144.432 E4.84552
G1 X164.644 Y145.299 E4.89326
G1 X164.124 Y146.103 E4.94131
G1 X163.166 Y147.112 E5.01113
G1 X162.007 Y147.891 E5.08125
G1 X160.710 Y148.396 E5.15107
G1 X159.335 Y148.606 E5.22089
G1 X138.734 Y148.603 E6.25475
G1 X137.797 Y148.483 E6.30217
G1 X136.888 Y148.225 E6.34960
G1 X136.027 Y147.834 E6.39703
G1 X135.234 Y147.321 E6.44446
G1 X134.225 Y146.363 E6.51427
G1 X133.446 Y145.203 E6.58440
G1 X132.941 Y143.907 E6.65421
G1 X132.731 Y142.532 E6.72403
G1 X132.734 Y121.931 E7.75789
G1 X132.854 Y120.994 E7.80532
G1 X133.112 Y120.084 E7.85275
G1 X133.503 Y119.224 E7.90017
G1 X134.016 Y118.431 E7.94760
G1 X134.862 Y117.526 E8.00975
G1 X136.632 Y118.253 F7800.000
G1 F1800.000

Edit: now that you say, I can see where I define my tool (M563 P0 D0 H1 F0) it have F0 in it, so it tries to tie it as a part cooling fan!