First Layer weird Z height change? Help!
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Hey all, I've been having this weird issue lately, not sure what the hell has caused it but every time I start a print after homing it will start at Z=0.28
Z offset is set to piece of paper at Z=0. I can manually step the z axis back down to 0 after starting and get a good first layer but then the second layer goes to 0.48. There is nothing in the start G-Code except Home and Load height map.
I tried even tried deleting height map and not loading it at all and it still does it. I tried another slicer and it still does it. Something isn't right...
I also updated firmware to the latest and redid all my config to no avail.
Trying to think back to when it first started happening and i can't think of anything i would have done to make this happen. I use to use the same height map for months on end before re-probing. I think i ran a mesh comp to update the height map one day and i feel it was dramas ever since. Just weird it happens with or without height map loaded..
Any ideas as to what could be the issue would be greatly appreciated. I'm ready to burn it... lol
; Configuration file for Duet WiFi (firmware version 3) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v3.3.16 on Tue Jul 18 2023 14:13:53 GMT+0800 (Australian Western Standard Time) ; General preferences M575 P1 S1 B57600 ; enable support for PanelDue G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"Seckit Go" ; set printer name M669 K1 ; select CoreXY mode ; Network 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 backwards M569 P3 S1 ; physical drive 3 goes backwards M584 X0 Y1 Z2 E3 ; set drive mapping M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation M92 X199.80 Y199.20 Z400.00 E396.88 ; set steps per mm M566 X600.00 Y600.00 Z12.00 E7200.00 ; set maximum instantaneous speed changes (mm/min) M203 X9000.00 Y9000.00 Z180.00 E72000.00 ; set maximum speeds (mm/min) M201 X2000.00 Y2000.00 Z20.00 E250.00 ; set accelerations (mm/s^2) M906 X1000 Y1000 Z1000 E800 I30 ; set motor currents (mA) and motor idle factor in per cent M84 S30 ; Set idle timeout M572 D0 S0.03 ; Set idle timeout ; Axis Limits M208 X0 Y0 Z0 S1 ; set axis minima M208 X310 Y325 Z350 S0 ; set axis maxima ; Endstops M574 X1 S3 ; configure sensorless endstop for low end on X M574 Y1 S3 ; configure sensorless endstop for low end on Y M574 Z1 S2 ; configure Z-probe endstop for low end on Z ; Z-Probe M950 S0 C"exp.heater4" ; create servo pin 0 for BLTouch M558 P9 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds G31 P500 X-20 Y15 Z1.55 ; set Z probe trigger value, offset and trigger height M557 X30:270 Y40:325 S40 ; 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 R0.513 K0.326:0.000 D4.45 E1.35 S0.80 B0 ; disable 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 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin e0temp M950 H1 C"e1heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1 M307 H1 R2.796 K0.420:0.132 D5.93 E1.35 S1.00 B0 V23.9 ; 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 S0 H1 T45 ; set fan 1 value. Thermostatic control is turned on M950 F2 C"fan1" Q500 ; create fan 2 on pin fan1 and set its frequency M106 P2 S0 H1 T45 ; set fan 2 value. Thermostatic control is turned on ; Tools M563 P0 S"Hotend" 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 v3.3.16 on Tue Jul 18 2023 14:13:54 GMT+0800 (Australian Western Standard Time) M400 ; make sure everything has stopped before we make changes M913 X40 Y40 ; drop motor currents to 50% M400 ;M915 X Y S5 M203 X5000.00 Y5000.00 Z180.00 E72000.00 ; set maximum speeds (mm/min) M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2) G91 ; relative positioning G1 H2 Z5 F10000 ; lift Z relative to current position ;G1 H1 X-315 Y-315 F8000 ; move quickly to X or Y endstop and stop there (first pass) G1 S1 X-315 F4000 ; home X axis G1 X5 F4000 ; go back a few mm G1 S1 Y-315 F4000 ; home Y axis G1 Y5 F4000 ; go back a few mm ;G1 H1 X-315 F360 ; move slowly to X axis endstop once more (second pass) ;G1 H1 Y-315 ; then move slowly to Y axis endstop M400 ; make sure everything has stopped before we reset the motor currents M913 X100 Y100 ; motor currents back to 100% M400 G90 ; absolute positioning G1 X175 Y175 F10000 ; go to first bed probe point and home Z M203 X18000.00 Y18000.00 Z180.00 E72000.00 ; set maximum speeds (mm/min) M201 X2500.00 Y2500.00 Z20.00 E250.00 ; set accelerations (mm/s^2) G30 ; home Z by probing the bed ; Uncomment the following lines to lift Z after probing ;G91 ; relative positioning ;G1 Z5 F100 ; lift Z relative to current position ;G90 ; absolute positioning -
Post your config-override.g and your slicer start gcode.
Also please share the first 100 lines or so of a sliced gcode file.@Peacemaker105 said in First Layer weird Z height change? Help!:
every time I start a print after homing it will start at Z=0.28
What layer height are you printing with?
