Duet maestro and weirdness on start gcode

Agniusm

My maestro started behaving weird. I dont remember if it happened after flashing firmware. I have this start code:
G28 ; home all without mesh bed level
G0 Z70 F500 ; get head above bed to keep it cool
M106 P1 S255 ; Turn on fan
M140 S[first_layer_bed_temperature] ; set bed temp
M104 S180
M190 S[first_layer_bed_temperature] ; wait for bed temp
M104 S180
G28 ; home all without mesh bed leveling
G29 S0 ; mesh bed leveling
M106 S0 ; Turn off fan
M104 S[first_layer_temperature] ; set extruder temp
M109 S[first_layer_temperature] ; wait for extruder temp
G1 Y0 X2 Z0.5 F7000 ; go outside print area
G92 E0 ; reset extrusion distance
G1 X70.0 E9 F1000 ; intro line
G1 X140 E12.5 F1000 ; intro line
M572 D0 S0.07 ; Pressure advance
It does not do "go outside print area" . Extruder stays as where probing finished and does intro line ~10mm above bed at the back instead of front at Z0.5mm

clearlynotstef

...What is the intended behavior, and what is it doing instead?

Agniusm

It jas to move to the front of the bed and do purging line. Instead it stays at the back and purges mid air.

clearlynotstef

Post your config.g

Phaedrux

Perhaps you need to add G90 before the move to go out of the printing area to make it an absolute position move and then back to G91 for a relative move to draw the prime line.

Agniusm

The thing is it was working fine. I still have duet wifi(eth now) with the same script and it works fine.

Agniusm

@clearlynotstef said in Duet maestro and weirdness on start gcode:

Post your config.g

; Configuration file for Duet Maestro (firmware version 1.21)

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

; Network
M550 P"Scrappy" ; Set machine name
M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M584 X0 Y1 Z2:4 E3 P3 ; two Z motors connected to driver outputs 0, 1, 2 and 4
M671 X40:287 Y21:21 S5 ; leadscrews left and right

M569 P0 S0 ; Drive 0 goes forwards
M569 P1 S0 ; Drive 1 goes forwards
M569 P2 S0 ; Drive 2 goes forwards
M569 P3 S0 ; Drive 3 goes forwards
M569 P4 S0 ; Drive 3 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X98.66 Y78.54 Z396.04 E417.61 ; Set steps per mm X99.25 Y79.0
M566 X400 Y400 Z12 E150 ; Set maximum instantaneous speed changes Jerk (mm/min) buvo Z24 E300
M203 X12000 Y12000 Z1000 E1200 U6000 ; Set maximum speeds (mm/min) Z800
M201 X600 Y600 Z100 E5000 ; Set accelerations (mm/s^2) Z200
M906 X800 Y800 Z700 E750 I5 ; Set motor currents (mA) and motor idle factor in per cent
M84 S10 ; Set idle timeout

; Axis Limits
M208 X0 Y-30 Z0 S1 ; Set axis minima
M208 X310 Y209 Z220 S0 ; Set axis maxima

; Z-Probe
M558 P4 I0 F400 X0 Y0 Z0 T12000 ; Set Z probe type, the dive height + speeds
G31 P500 X23 Y6 Z0.566 ; Set Z probe trigger value, offset and trigger height
M557 X35.5:239.5 Y10.5:209 S102:99 ; Define mesh grid

; Endstops
M574 X1 Y1 Z2 S1 ; Define active low and unused microswitches
; M591 D0 P2 C4 S1 ; Filament runout
; M556 S79.95 X-0.1 Y0.5 Z0.55 ; Axes compensation

; Heaters
M143 S350 ; Set maximum hotend temperature to 350C
M143 H0 S120 ; Set maximum bed temperature to 130C
M305 P1 T100000 B3950 C0 R2200 ; Set thermistor + ADC parameters for heater 1 Nozzle
M305 P0 T100000 B3950 C0 R2200 ; Set thermistor + ADC parameters for heater 0 Bed
M307 H1 A435.6 C127.3 8.8 B0 ; Use PID on extruder heater use M303 gain 435.6, time constant 127.3, dead time 8.8, max PWM 1.00, calibration voltage 12.0
M307 H0 A80.2 C399.8 D2.2 B0 ; Use PID on bed heater use M303
M570 H1 P10 T20 S160 ; Heater fault settings

; Fans
M106 P2 S0 L255 F500 T45 H1 ; Hotend fan, on at 45C M106 P1 T45 S0.7 H1:2
M106 P1 S0 I0 F500 H-1 ; Part cooling fan
; M106 P2 S0 I0 F500 H-1 ; LED lights

; Tools
M563 P0 D0 H1 F1 ; 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
; LCD
M918 P1 E4 ; enable lcd

Veti

post the actual start code of a generated gcode file.
the slicer will insert additional commands at the beginning.

Agniusm

@veti here is the beginning of the gcode:

; external perimeters extrusion width = 0.42mm
; perimeters extrusion width = 0.42mm
; infill extrusion width = 0.50mm
; solid infill extrusion width = 0.42mm
; top infill extrusion width = 0.42mm
; first layer extrusion width = 0.42mm

M107
G28 W ; home all without mesh bed level
G0 Z70 F500 ; get head above bed to keep it cool
M106 P1 S255 ; Turn on fan
M140 S75 ; set bed temp
M104 S180
M190 S75 ; wait for bed temp
M104 S180
G28 W ; home all without mesh bed leveing
G29 S0 ; mesh bed leveling
M106 S0 ; Turn off fan
M104 S235 ; set extruder temp
M109 S235 ; wait for extruder temp
G1 Y0.0 F5000 ; go outside print area
G92 E0 ; reset extrusion distance
G1 X70.0 E9 F1000 ; intro line
G1 X140 E12.5 F1000 ; intro line
M572 D0 S0.07 ; Pressure advance
; Filament gcode
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
G1 E-1.00000 F2100.00000
G1 Z0.250 F9000.000
; PURGING FINISHED
G1 X130.316 Y151.203
G1 E1.00000 F2100.00000
M204 S1000
G1 F900
G1 X183.884 Y151.203 E1.95815
G1 X183.884 Y164.498 E0.48600
G1 X130.316 Y164.498 E1.95816
G1 X130.316 Y151.263 E0.48380
G1 X130.682 Y151.569 F9000.000
G1 F900
G1 X183.518 Y151.569 E1.93137
G1 X183.518 Y164.131 E0.45921
G1 X130.682 Y164.131 E1.93137
G1 X130.682 Y151.629 E0.45702
G1 X131.049 Y151.935 F9000.000

It does not contain full G1 Y0 X2 Z0.5 F7000 ; go outside print area command with set x coordinate but since i added it, has same outcome.

dc42

@agniusm said in Duet maestro and weirdness on start gcode:

G28 W ; home all without mesh bed level

Why the W parameter?

Agniusm

@dc42 It was from prusa start script but its not there now. No change still. Probably had no effect anyway.

Phaedrux

@agniusm said in Duet maestro and weirdness on start gcode:

G1 Y0.0 F5000 ; go outside print area
G92 E0 ; reset extrusion distance
G1 X70.0 E9 F1000 ; intro line
G1 X140 E12.5 F1000 ; intro line

I say again, it looks like you're missing G90 and G91 commands here. G1 Y0 makes no sense in the context of a relative move. But the next movements are to extrude a prime like, which would require a relative move.

dc42

What firmware versions are your Duet WiFi and Duet maestro running?

Are there any error messages on the GCode Console when this happens?

Agniusm

Maestro on 2.02RC5. My duet wifi(eth now) runs 2.03 but it have never done that but start script is almost the same.
I have not noticed any errors in the gcode console but i will keep an eye.
It finishes mesh bed compensation, and then sort of glitches 1mm or so and stays at that last spot

Agniusm

here is the video:
https://youtu.be/Eaedp-ZMEvg
I have updated to 2.03 and still same.

Veti

you never answered Phaedrux post about switching to absolute positioning for those moves.

Agniusm

@veti I dont know why would it be different as my duet wifi works ok with the same script.
P.S. OK. I have figured it out.
I have placed my move to the fron of the bed before these:
M104 S[first_layer_temperature] ; set extruder temp
M109 S[first_layer_temperature] ; wait for extruder temp
and now it works

Agniusm

Case closed;

Agniusm

Re-opened. Looks like it does it random. I don't know what is happening. Whenever i sliced with the new start script it went and did how it suppose to. Now prints finished and i started same file again and it again remained at the back of the bed and purged mid air.

Veti

as Phaedrux has said multible times in this thread, you need to make sure that when the code is executed it needs to be in absolute positioning . so add the correct G90 and G91 commands to your code.

Agniusm

@veti do i need to add it just for that move or the whole start script?

Veti

try with a G90 at the beginning

deckingman

@agniusm By way of explanation, a relative move such as G1 X10, Y10 will move the print head by 10mm positive in both the X and Y directions. Whereas in absolute mode, that same G1 X10 Y10 will move the print head to the position which is 10mm in both X and Y from the homed position (usually 0,0).

So for example if the print head started at X50 , Y60 then relative G1 X10 Y10 will move the print head another 10mm in each direction and it will end up at X60 Y70. But in absolute mode starting with the print head in that same position of X50 Y60 that same G1 X10 Y10 command will move the print to X10 Y10 so it will move minus 40mm in X and minus 50mm in Y.

In actual fact, all moves have to be relative to some point in space. So absolute moves mean go to an XY position relative to the homed position. Therefore it follows that if the homed position hasn't been established, then any absolute moves aren't going to work properly.

In summary, use relative to move by an amount, use absolute to move to a position (relative to the homed position).

Phaedrux

@phaedrux said in Duet maestro and weirdness on start gcode:

@agniusm said in Duet maestro and weirdness on start gcode:

G1 Y0.0 F5000 ; go outside print area
G92 E0 ; reset extrusion distance
G1 X70.0 E9 F1000 ; intro line
G1 X140 E12.5 F1000 ; intro line

I say again, it looks like you're missing G90 and G91 commands here. G1 Y0 makes no sense in the context of a relative move. But the next movements are to extrude a prime like, which would require a relative move.

So the snippet above would become

G90 ; absolute positioning
G1 Y0 X0 F5000 ; go outside print area
G92 E0 ; reset extrusion distance
G91 ; relative positioning
G1 X70.0 E9  F1000 ; intro line
G1 X140 E12.5  F1000 ; intro line

Agniusm

@deckingman Thanks. Yes, i am familiar with what those command do and how they work.
Adding G90 at the begining of the move and G91 after seems to have solved the problem, at least on couple prints i did so far.
Thanks