Homing and bed levelling dont employ Bltouch xy offset RFF3.3

mpoly · 10 Nov 2021, 17:24

Hello,
I am trying to setup a 400x400 blv with triple z axis, and for the love of God cannot understand why when homing and running G32, my probe offset doesnt come into play. Instead, the nozzle is going to the specified locations instead of the probe. Can someone please take a look at my relative files and tell me where i have screwed up. Thanks in advance for all help.
; Configuration file for Duet WiFi (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.4 on Thu Oct 07 2021 18:26:46 GMT+0300 (Eastern European Summer Time)

; General preferences
M575 P1 S1 B19200 ; enable support for PanelDue
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"MYBLV" ; set printer name
M669 K1 ; select CoreXY mode

; Network
M552 S1 P"3dworx" ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M671 X405:205:3 Y-10:-8:-10 S20 ; The Z axis pivot point locations to allow true levelling to be undertaken
M569 P0 S1 ; physical drive 0 goes forwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S1 ; physical drive 3 goes forwards
M584 X0 Y1 Z4:2:5 E4 ; three Z motors connected to driver outputs 4, 2 and 11
M671 X468:200:-58 Y-25:468:-25 S5 ; leadscrews at front left, rear middle and front right
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z800.00 E389.00 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z1200.00 E900.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 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

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X400 Y400 Z360 S0 ; set axis maxima

; Endstops
M574 X0 S1 P"xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y0 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
M574 Z1 S2 ; configure Z-probe endstop for low end on Z

; Z-Probe
M950 S0 C"duex.pwm5" ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H10 F600 T12000 ; set Z probe type to bltouch and the dive height + speeds
M584 X0 Y1 Z4:2:5 E4 ; three Z motors connected to driver outputs 4, 2 and 11
G31 P500 X57 Y-4.2 Z5 ; set Z probe trigger value, offset and trigger height
M557 X60:360 Y60:360 S60 ; 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 B1 S1.00 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S100 ; set temperature limit for heater 0 to 100C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; 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 R2.263 C201.3:201.3 D11.65 S1.00 V25.3 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S350 ; set temperature limit for heater 1 to 350C

; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S1 H1 T45 ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S0 H-1 ; set fan 1 value. Thermostatic control is turned off

; Tools
M563 P0 D0 H1 F0 ; define tool 0
G10 P0 X-57 Y4.2 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

; Miscellaneous

M911 S22 R23.5 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss

bed file

; bed.g
; called to perform automatic bed compensation via G32
;
; generated by RepRapFirmware Configuration Tool v3.3.4 on Thu Oct 07 2021 18:26:46 GMT+0300 (Eastern European Summer Time)
; this script compensates for what the Z offset is
; so if G31 P500 X-30 Y-15 Z1.7 then first probe will be at
; X30 Y20 (when G30 P0 X0 Y5)
M561 ; clear any bed transform

M671 X405:205:3 Y-10:-8:-10 S20 ; The Z axis pivot point locations to allow true levelling to be undertaken
G30 P0 X400 Y0 Z-99999 ; Probe near Front left leadscrew
G30 P1 X400 Y400 Z-99999 ; PROBE POINT 2 Rear Left
G30 P2 X200 Y400 Z-99999 ; Probe near Rear Middle leadscrew
G30 P3 X60 Y400 Z-99999 ; PROBE POINT 4 Rear Right
G30 P4 X200 Y200 Z-99999 ; PROBE POINT 5 Center
G30 P5 X200 Y0 Z-99999 ; PROBE POINT 6 Front Middle
G30 P6 X60 Y0 Z-99999 S3 ; Probe near Front Right leadscrew and calibrate the 3 motors to achieve self leveling

homeall file

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.3.4 on Thu Oct 07 2021 18:26:46 GMT+0300 (Eastern European Summer Time)

G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Y-400 ; home Y axis
G1 Y5 F6000 ; go back a few mm
G1 H1 Y-400 ; then move slowly to Y axis endstop
G1 H1 X-405 ; home X axis
G1 X5 F6000 ; go back a few mm
G1 H1 X-400 F360 ; move slowly to X axis endstop once more (second pass)
G90 ; absolute positioning
G1 X200 Y200 F6000 ; go to first bed probe point and home Z
G30 ; home Z by probing the bed
G91 ; relative positioning
G1 Z5 F100 ; lift Z relative to current position
G90 ; absolute positioning

homez file

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.3.4 on Thu Oct 07 2021 18:26:46 GMT+0300 (Eastern European Summer Time)

G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G90 ; absolute positioning
G1 X200 Y200 F10000 ; go to first probe point
G30 ; home Z by probing the bed
G91 ; relative positioning
G1 Z5 F100 ; lift Z relative to current position
G90 ; absolute positioning

gloomyandy · 11 Oct 2021, 18:21

@mpoly I'd be surprised if it is not taking the offset into account in the G32 code as that uses G30 with X Y coordinates and they usually refer to the probe position. In the case of homing they just use normal g1 commands so can't really take the offset into account (how would they know?). If the G32 is really not using your offsets I'd check that there is not an error in the G31 that describes the probe, try running M98 p"config.g" to see if there are any errors or run m31 (no parameters) to see if the settings are correct.

fcwilt · 11 Oct 2021, 18:56

@mpoly

For the bed leveling pick the three points near the lead screws and just use those.

It's quick and as accurate as needed.

When using the syntax G30 P# Xaaa Ybbb Z-99999 the point probed should be X=aaa and Y=bbb.

If not something is wrong.

And, of course, the XY motion system has to be physically able to move the probe to the specified points.

The only time you need to worry about the probe offsets is when you are trying to probe a given point with just a plain G30.

Then you need to do the math to get the probe where you want it to be and use a G1 to move the probe there.

Frederick

mpoly · 12 Oct 2021, 12:08

@gloomyandy said in Homing and bed levelling dont employ Bltouch xy offset RFF3.3:

M98 p"config.g"

this is the result i get from your suggestions

10/12/2021, 3:06:17 PM m31
Warning: M31: Command is not supported

10/12/2021, 3:05:39 PM M98 p"config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled

Thank you for your input

gloomyandy · 12 Oct 2021, 12:11

@mpoly Sorry that should have been G31, not M31

mpoly · 12 Oct 2021, 12:15

@fcwilt said in Homing and bed levelling dont employ Bltouch xy offset RFF3.3:

G30 P# Xaaa Ybbb Z-99999

I have chosen points that the probe is physically able to reach. Doing a single g30 with coordinates doesnt consider the offsets, unfortunately.
Any more ideas? What else could be wrong besides syntax errors in my config.g or bed.g?

mpoly · 12 Oct 2021, 12:17

@gloomyandy
No problem,
well
g31
Z probe 0: current reading 0, threshold 500, trigger height 5.000, offsets X57.0 Y-4.2

all is fine, but still its not taking it into effect with g32

gloomyandy · 12 Oct 2021, 12:29

@mpoly So if you run G30 P0 X200 Y200 Z-9999 what happens and what are the X and Y coordinates displayed by DWC after the probe has completed?

fcwilt · 12 Oct 2021, 12:36

@mpoly said in Homing and bed levelling dont employ Bltouch xy offset RFF3.3:

@fcwilt said in Homing and bed levelling dont employ Bltouch xy offset RFF3.3:

G30 P# Xaaa Ybbb Z-99999

I have chosen points that the probe is physically able to reach. Doing a single g30 with coordinates doesnt consider the offsets, unfortunately.
Any more ideas? What else could be wrong besides syntax errors in my config.g or bed.g?

When you say "single G30" do you mean G30 Xaaa Ybbb? That syntax is not supported.

The usually reason for probing a single point is to set the Z=0 Datum. To do that you need to use a normal G1 Xaaa Ybbb command to move to the desired location, taking into account the parameters aaa and bbb need to be computed based on probe offsets.

The a plain G30 will probe at the current XY location and set the Z=0 Datum.

If I completely misunderstood your post please correct me.

Thanks.

Frederick

mpoly · 12 Oct 2021, 12:49

Thank you both for your efforts and time, i DID find my mistake after all. You know, sometimes my brain is so crippled that i cannot see clearly. Somehow i added the same offsets to Tool 0 script. All is good now..