@apak Tried the G30, no change. The printer still comes too close to the bed when printing.

Currently, I am waiting for a new set of feeler gauges and I will do some testing manually. Maybe the probe needs it's sensitivity increased.

I spent most of yesterday testing probe points. I put together a macro that probes the centre of the bed first and then goes to all the bed.g points and probes to find the trigger height in that spot. Adding the height corrections to bed.g seems to have had no effect, it's almost like the printer is ignoring the corrections.

Running G32 shows "Calibrated 6 factors using 9 points, (mean, deviation) before (0.055, 0.027) after (-0.000, 0.004)", which as far as I understand is pretty good right?

In case it helps. Here is the bed.g file and the config-override.g

bed.g

; bed.g file for RepRapFirmware, generated by Escher3D calculator
; 10 points, 6 factors, probing radius: 115, probe offset (0, 0)

M561 ; Clear bed transform
G28 ; Home the effector

G30 P0 X0.00 Y115.00 Z-99999 H-0.0400029
G30 P1 X99.59 Y57.50 Z-99999 H-0.0029763
G30 P2 X99.59 Y-57.50 Z-99999 H-0.0388076
G30 P3 X0.00 Y115.00 Z-99999 H-0.0384381
G30 P4 X-99.59 Y-57.50 Z-99999 H-0.2030215
G30 P5 X-99.59 Y57.50 Z-99999 H0.0401963
G30 P6 X0.00 Y57.50 Z-99999 H0.0718113
G30 P7 X49.80 Y-28.75 Z-99999 H-0.0086697
G30 P8 X-49.80 Y-28.75 Z-99999 H-0.0451099 S6

;G30 P0 X0.00 Y115.00 Z-99999 H0
;G30 P1 X99.59 Y57.50 Z-99999 H0
;G30 P2 X99.59 Y-57.50 Z-99999 H0
;G30 P3 X0.00 Y-115.00 Z-99999 H0
;G30 P4 X-99.59 Y-57.50 Z-99999 H0
;G30 P5 X-99.59 Y57.50 Z-99999 H0
;G30 P6 X0.00 Y57.50 Z-99999 H0
;G30 P7 X49.80 Y-28.75 Z-99999 H0
;G30 P8 X-49.80 Y-28.75 Z-99999 H0
;G30 P9 X0 Y0 Z-99999 S6

G1 X0 Y0 Z150 F15000 ; Move the effector 150mm above the bed

M500 ; Save settings

config-override.g

; config-override.g file generated in response to M500 at 2023-08-13 01:10
; This is a system-generated file - do not edit
; Delta parameters
M665 L288.120:288.120:288.120 R139.781 H217.344 B115.0 X0.902 Y0.545 Z0.000
M666 X-0.627 Y0.542 Z0.085 A0.00 B0.00
; Heater model parameters
M307 H0 R0.258 K0.330:0.000 D5.15 E1.35 S1.00 B0
M307 H1 R2.229 K0.412:0.000 D4.53 E1.35 S1.00 B0 V12.0
; Workplace coordinates
G10 L2 P1 X0.00 Y0.00 Z0.00
G10 L2 P2 X0.00 Y0.00 Z0.00
G10 L2 P3 X0.00 Y0.00 Z0.00
G10 L2 P4 X0.00 Y0.00 Z0.00
G10 L2 P5 X0.00 Y0.00 Z0.00
G10 L2 P6 X0.00 Y0.00 Z0.00
G10 L2 P7 X0.00 Y0.00 Z0.00
G10 L2 P8 X0.00 Y0.00 Z0.00
G10 L2 P9 X0.00 Y0.00 Z0.00

@apak Do you mean this part?

G1 Z10 F6000                           ; Bajo rapido para hacer el probe
G30                                    ;Establezco altura Z para evitar error Z-datum y que cargue correctamente el offset del prob
M98 P"0:/sys/00-Functions/print_area_mesh.g" A{first_layer_print_min[0]} B{first_layer_print_max[0]} C{first_layer_print_min[1]} D{first_layer_print_max[1]}
M376 H5                               ; turn on fade feature so it fades after 5mm height

@dc42 I just checked the output of M665 and it shows the homed height as 216.653.

I also confirmed that G32 is run as part of my start G-code, and G28 is not being run before printing. I have also tried with UBL on and off, with no noticeable difference in printing outcome

It's really odd because the output from G32 seems to indicate that it has things pretty dialed in, but then fails miserably to print.

Hey All,

I have a heavily modified Anycubic Kossel that I have upgraded with an SKR2, E3D v6, Haydn magballs/arms, and a SmartEffector v3. I am running RepRapFirmware for STM32F4 based Boards 3.4.5+_107 (2023-05-24), with DWS version 2.1beta4. While I completed the upgrade a while ago, I have not had much luck getting the system calibrated, causing first layers to fail or at least come out poorly.

I notice when testing probe repeatability, I get the following results:

G32 bed probe heights: -0.405 -0.443 -0.455 -0.455 -0.430 -0.455 -0.455 -0.468 -0.468 -0.443, mean -0.448, deviation from mean 0.018

Any suggestions for correcting the probe height reading?

My config.g:

; Configuration file for BTT SKR 2 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.4.0-LPC-STM32+5 on Sun Feb 05 2023 12:03:53 GMT-0500 (Eastern Standard Time)

; General preferences
G90                                                    ; send absolute coordinates...
M83                                                    ; ...but relative extruder moves
M550 P"Kossel"                                         ; set printer name
M665 R120 L288.12 B115 H217                            ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0                                          ; put your endstop adjustments here, or let auto calibration find them

; Network
M551 P"Ddr2@667mhz"                                    ; set password
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 using default driver timings
M569 P1 S1                                             ; physical drive 1 goes forwards using default driver timings
M569 P2 S1                                             ; physical drive 2 goes forwards using default driver timings
M569 P3 S0                                             ; physical drive 3 goes backwards using default driver timings
M584 X0 Y1 Z2 E3                                       ; set drive mapping
M350 X16 Y16 Z16 E16 I1                                ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z80.00 E425.68                       ; set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E1200.00               ; set maximum instantaneous speed changes (mm/min)
M203 X18000.00 Y18000.00 Z18000.00 E1200.00            ; set maximum speeds (mm/min)
M201 X3000.00 Y3000.00 Z3000.00 E3000.00               ; set accelerations (mm/s^2)
M906 X1200 Y1200 Z1200 E1340 I30                       ; set motor currents (mA) and motor idle factor in per cent - Originally was set to 1000 for all motors
M84 S30                                                ; Set idle timeout

; Axis Limits
M208 Z-0.3 S1                                          ; set minimum Z. Original Z0 

; Endstops
M574 X2 S1 P"xstop"                                    ; configure switch-type (e.g. microswitch) endstop for high end on X via pin xstop
M574 Y2 S1 P"ystop"                                    ; configure switch-type (e.g. microswitch) endstop for high end on Y via pin ystop
M574 Z2 S1 P"zstop"                                    ; configure switch-type (e.g. microswitch) endstop for high end on Z via pin zstop

; Z-Probe
M558 P8 R0.4 C"probe+servo0" H5 F1200 T6000            ; set Z probe type to effector and the dive height + speeds
G31 P100 X0 Y0 Z-0.1                                 ; set Z probe trigger value, offset and trigger height (trigger height is -0.1 due to Duet Smart Effector)
M557 R110 S15                                          ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4092         ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bed" T0                                      ; create bed heater output on bed 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 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"e0heat" T1                                   ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 S1.00                                       ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S285                                           ; 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 C"Stepper Driver Fan" H0:10:11 T15:100         ; set fan 0 name and value. Thermostatic control is turned on
M950 F1 C"fan1" Q500                                   ; create fan 1 on pin fan1 and set its frequency
M106 P1 C"Hotend Fan" S1 H1 T65                        ; set fan 1 name and value. Thermostatic control is turned on
M950 F2 C"fan2" Q500                                   ; create fan 2 on pin fan2 and set its frequency
M106 P2 C"Part-cooling Fan" S0 H-1                     ; set fan 2 name and value. Thermostatic control is turned off

; Tools
M563 P0 S"E3D v6" D0 H1 F2                             ; 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

; Sensors
M308 S10 Y"mcu-temp" A"MCU"                            ; defines sensor 10 as MCU temperature sensor
M308 S11 Y"drivers" A"Stepper Drivers"                 ; defines sensor 11 as stepper driver temperature sensor

M501