Bed mesh compensation don't compenses all deviations
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Hi,
I've got problems with compensation on my first layers.
When I probe (G29), I measure a deviation between 2 points of 0.4mm, however, when I print a straight line between these 2 points, I measure a compensation on the Z motors of only 0.2mm.
Is there a maximum compensation value? Or a factor to change in the config.g?
My printer is a Ratrig VCore 3, I use RRF3 on a Duet3 mini 5+ and here is my config.g :
; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"GigaRat" ; set printer name M669 K1 ; CoreXY G21 ; Set Units to Millimeters ; Network M552 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 M569 P0.0 S1 D2 ; physical drive 0.0 goes forwards M569 P0.1 S1 D2 ; physical drive 0.1 goes forwards M569 P0.2 S1 D2 ; physical drive 0.2 goes forwards M569 P0.3 S1 D2 ; physical drive 0.3 goes forwards M569 P0.4 S1 D2 ; physical drive 0.4 goes forwards M569 P0.5 S1 D2 ; physical drive 0.5 goes forwards M584 X0.5 Y0.4 Z0.0:0.1:0.2 E0.3 ; set drive mapping M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation M92 X80.154 Y80.154 Z798.56 ; set steps per mm M906 X1300 Y1300 Z1000 I30 ; set motor currents (mA) and motor idle factor in per cent M84 S10 ; Set idle timeout M566 X400.00 Y400.00 Z6.00 E120.00 P1 ; set maximum instantaneous speed changes (mm/min) M203 X10800.00 Y10800.00 Z1000.00 E3600.00 ; set maximum speeds (mm/min) M201 X3000.00 Y3000.00 Z100.00 E3600.00 ; set accelerations (mm/s^2) ; Axis Limits M208 X0 Y0 Z0 S1 ; set axis minima M208 X286 Y280 Z280 S0 ; set axis maxima ; Endstops M574 X1 S1 P"io1.in" ; configure active high endstops M574 Y2 S1 P"io3.in" ; configure active high endstops M574 Z1 S2 ; configure Z-probe endstop for low end on Z M671 X-4.5:150:304.5 Y-4.52:305:-4.52 S5 ; define positions of Z leadscrews or bed levelling screws M557 X30:286 Y0:225 P5 ; define 5x5 mesh grid M376 H20 ; Heaters M308 S0 P"temp0" Y"thermistor" T100000 B3950 A"Bed" ; configure sensor 0 as thermistor on pin temp0 M950 H0 C"out0" T0 ; create bed heater output on out5 and map it to sensor 0 M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit M140 H0 ; map heated bed to heater 0 M143 H0 S121 ; set temperature limit for heater 0 to 110C ;; Run Bed PID Tune!! Bellow is an example for a 300x300 bed M307 H0 A303.1 C356.7 D1.4 S1.00 V24.0 B0 ; Fans M950 F0 C"out6" Q500 ; create fan 0 on pin out3 and set its frequency M106 P0 C"Hotend Fan" S0 H1 T45 L255 ; set fan 0 name and value. Thermostatic control turned on for Hotend M950 F1 C"out4" Q500 ; create fan 1 on pin out4 and set its frequency M106 P1 C"Layer Fan" S0 H-1 L255 ; set fan 1 name and value. Thermostatic control is turned off M308 S10 Y"mcu-temp" A"MCU" ; MCU temp on temp sensor 10 M950 F2 C"out3" ; create fan 1 on pin out6 and set its frequency M106 P2 S255 H10 T20 ; set fan 1 value. Virtual thermostatic control is turned on, turn on and off M912 P2 S0 ; MCU temperature calibration ; 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 M950 H1 C"out1" T1 ; create nozzle heater output on out2 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 the maximum temperature in C for heater ; EVA 2 / BMG / E3D V6 M92 E409 ; set extruder steps per mm, 0.9 angle/step (LDO Pancake) M906 E800 ; set extruder motor current (mA) and idle factor in per cent M308 S1 P"temp1" Y"thermistor" T100000 B4725 C7.060000e-8 A"Hotend" ;; Run Heater PID Tune!! M307 H1 A751.5 C196.6 D4.7 S1.00 V23.9 B0 ; Z-Probe ;; Inductive Probe ; M558 P5 C"!io3.in" H5 F400 T5000 ; set Z probe type to unmodulated and the dive height + speeds ; G31 P500 X-30 Y-15 Z0.20 ; set Z probe trigger value, offset and trigger height, more Z means closer to the bed ;; BLTouch M950 S0 C"io2.out" ; Create a servo pin on io7 M558 P9 C"io2.in" H5 F240 T10800 A5 ; set Z probe type to unmodulated and the dive height + speeds G31 P25 X24.5 Y-46 Z3.5 ; set Z probe trigger value, offset and trigger height, more Z means closer to the bed ; Pressure Advance M572 D0 S0.035 ; PanelDue M575 P1 S1 B57600 ;Température Chambre M308 S2 P"temp2" Y"thermistor" T100000 B4725 A"Chambre" ;M950 F2 C"out5" T2 ; create fan 0 on pin out3 and set its frequency ;M106 P2 T40:60 H2 ; set fan 0 name and value. Thermostatic control turned on for Hotend T0Thanks ;))
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@aodrennn said in Bed mesh compensation don't compenses all deviations:
M376 H20
You have set a taper off value, so the amount will be less than actual. This could explain some of it. Between the points it will also be interpolating the values.
Try with the taper turned off.
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@phaedrux
I'll test that, thanks !
