Have to run G code file twice to begin print at correct height
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Hi guys
I have this issue where I send the g code file to the duet wifi, and all is well until it starts to print. The nozzle tip is quite a few mm above the heatbed, I cancel, start another, then its perfect. Any clue why this is ?
I have posted below, config, home all, home z, and a snippet from the beginning of the code file
; Configuration file for Duet WiFi (firmware version 2.03)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.1.3 on Wed Nov 27 2019 02:27:21 GMT-0500 (EST); General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"ALPHA 300" ; set printer name; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet; Drives
M569 P0 S0 ; physical drive 0 goes backwards
M569 P1 S0 ; physical drive 1 goes backwards
M569 P2 S0 ; physical drive 2 goes backwards
M569 P3 S0 ; physical drive 3 goes backwards
M584 X0 Y1 Z2 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z1600.00 E311.00 ; set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z300.00 E4200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2)
M906 X1050 Y1050 Z1250 E1050 I30 ; 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 Y300 Z190.19 S0 ; set axis maxima; Endstops
M574 X1 Y1 Z2 S0 ; set active low end endstops; Z-Probe
;M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
;M557 X15:215 Y15:195 S20 ; define mesh grid; Heaters
M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M143 H0 S80 ; set temperature limit for heater 0 to 80C
M305 P1 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 1
M143 H1 S260 ; set temperature limit for heater 1 to 260C; Fans
M106 P0 S1 I0 F500 H-1 ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned OFF
M106 P1 S1 I0 F500 H1 T45 ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned ON
M106 P2 S1 I0 F500 H-1 ; set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned OFF; Tools
M563 P0 S"NOZZLE " 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
————————————————————————————————————————
; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v2.1.3 on Wed Nov 27 2019 02:27:21 GMT-0500 (EST)
G91 ; relative positioning
G1 H2 Z5 F300 ; lift Z relative to current position
G1 H1 X-305 Y-305 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000 ; go back a few mm
G1 H1 X-305 Y-305 F360 ; move slowly to X and Y axis endstops once more (second pass)
G1 H1 Z195.19 F300 ; move Z up stopping at the endstop
G90 ; absolute positioning
G92 Z190.19 ; set Z to axis minimum (you may want to adjust this); Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 S2 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning————————————————————————————————————————
; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v2.1.3 on Wed Nov 27 2019 02:27:21 GMT-0500 (EST)
G91 ; relative positioning
G1 H2 Z5 F300 ; lift Z relative to current position
G1 H1 Z195.19 F300 ; move Z up until the endstop is triggered
G90 ; absolute positioning. added extra line could remove for testing
G92 Z190.19 ; set Z position to axis minimum (you may want to adjust this); Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 H2 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning————————————————————————————————————————
;FLAVOR:RepRap
;TIME:44156
;Filament used: 9.62041m
;Layer height: 0.2
;Generated with Cura_SteamEngine 3.6.0
T0
M190 S60
M104 S210
M109 S210
M82 ;absolute extrusion mode
G90 ; Absolute Position
G28 ; Home ALL axis
G1 X30 Y30 Z170
G92 E0 ; Reset extruder
G1 X30 Y30 F4000 ;move X/Y to front of printer
G1 Z15.0 F9000 ;move the platform to 15mm
G4 5000
G92 E0 ;zero the extruded length
G1 F200 E50 ;extrude 10 mm of feed stock
G4 10000
G92 E0 ;zero the extruded length again
G4 1000
M83 ;relative extrusion mode
G1 F1500 E-6.5
;LAYER_COUNT:401
;LAYER:0
M107
G0 F7500 X165.65 Y76.023 Z0.16
;TYPE:SKIRT
G1 F1500 E6.5
G1 F900 X165.918 Y75.542 E0.00552
G1 X166.252 Y75.104 E0.00553
G1 X166.647 Y74.72 E0.00553
G1 X167.093 Y74.396 E0.00553
G1 X167.581 Y74.141 E0.00552 -
I would guess that it's due to homing to Z max and the homed height being set with G92 Z190 is not exactly correct?
