problem with irregular bltouch mesh

RODOKAS

forgive me for the bad english done by google.
I have a corexy that I build, a 300x300 table with 2 4mm pitch spindles and 4 10mm rods with lm10. Duet 2 wifi firmware 3
I've been following the forum for a long time and I'm familiar with the reprap but I have a problem with bl touch that I can't solve, please help me.
I can use my machine normally when the piece is small but when it occupies the entire table I have problems.
I do the readings with a bltouch every 50mm in x and y, I have a precise mesh, I redo the measurements and I get the same results, when I print a large piece, I notice that at times the filament gets too tight on the table and in others barely group because the beak is high.
I also follow the movements of 2 spindles looking at the mesh generated in the DWC, and it seems that the movements of the motors correspond to the irregularities in the table, but on the impression this does not seem to happen.
So, I have a whole mesh reading system working perfectly, but it’s not as efficient on the whole table. I do not know what to do, I have checked several times all the mechanical system of the machine and everything is ok, I would like to know from you if there is something I can check.

M569 P0 S0 F3                                     ; physical drive 0 goes forwards	
M569 P1 S0 F3                                     ; physical drive 1 goes forwards	
M569 P2 S1 F3                                     ; physical drive 2 goes backwards	
M569 P3 S1 F3                                        ; physical drive 3 goes backwards
M569 P4 S1                                     ; physical drive 4 goes backwards	
M584 X0 Y1 Z2:3 E4                                 ; set drive mapping
M350 X16 Y16 Z16:16 E16 I1             	            ; Micropassos cem interpolação
M92 X80.00 Y80.00 Z800.00:800.00 E416,5           ; set steps per mm
M566 X400.00 Y400.00 Z60.00:60.00 E2000.00 P1            ; set maximum instantaneous speed changes (mm/min) JERK
M203 X12000.00 Y12000.00 Z720.00:720.00 E2100.00   ; set maximum speeds (mm/min)
M201 X2300.00 Y2300.00 Z240.00:240.00 E9000.00       ; set accelerations (mm/s^2)
;M204 P2600 T2000  							       ; set accelerations travel (mm/s^2)
M906 X1150 Y1150 Z1150:1150 E700 I30               ; set motor currents (mA) and motor idle factor in per cent
M84 S20                                            ; Set idle timeout
                                ; Z-Probe
M950 S0 C"exp.heater3"                             ; criar servo / gpio 0 no aquecedor de 3 pinos no conector de expansão
M558 P9 C"^zprobe.in" R0.2 H2.8 F60 T10800                ; BLTouch conectado ao pino de entrada da sonda Z
G31 P500 X-4.5 Y25 Z0.55                           ; deslocamento da sonda com o bico
M557 X20:280 Y30:290 S50                           ; define mesh grid
                                  ; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950     ; 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 A180.2 C510.1 D2.9 S0.70 V12.8 B0          ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S115                                       ; set temperature limit for heater 0
M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C0.0000000706      ; configuração conforme recomendação do duet3d
M950 H1 C"e0heat" T1                               ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 A651.7 C191.8 D6.3 S1.00 V12.7 B0          ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S250                                       ; seta o limite de temperatura para o extrusor
                                 ; Axis Limits
M208 X-3 Y0 Z0 S1                                  ; set axis minima
M208 X300 Y300 Z345 S0                             ; set axis maxima
                                  ; Endstops
M574 X1 S1 P"xstop"                                ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                                ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S1 P"zstop+e1stop"

currently when i have to print on the whole table i follow the entire first layer and keep changing the extrusion factor to compensate for the difference in height.
again i reaffirm some items: bltouch with repeatability in readings ok, z axis adjusted and nothing is screwing or heavy. the x and y axes are also ok they are not going down. not what I can try to do.

fcwilt

Hi,

Please post your heightmap.csv file.

Thanks.

Frederick

RODOKAS

I now send photos of a test that I do, there are some squares inside each other, with 0.4mm space between them, the largest square is 280mm, line height is 0.3mm, the motors compensate according to the mesh generated by bltouch but in practice the layer is irregular.

RODOKAS

@fcwilt

RepRapFirmware height map file v2 generated at 2020-09-30 16:08, min error -0.121, max error 0.077, mean -0.034, deviation 0.048
xmin,xmax,ymin,ymax,radius,xspacing,yspacing,xnum,ynum
15.00,285.00,25.00,295.00,-1.00,45.00,45.00,7,7
0.007, -0.064, -0.099, -0.105, -0.106, -0.070, -0.015
-0.006, -0.064, -0.111, -0.105, -0.056, -0.029, 0.005
0.005, -0.038, -0.045, -0.073, -0.076, -0.048, 0.020
0.045, 0.017, -0.021, -0.036, -0.039, -0.034, 0.025
0.030, -0.015, -0.033, -0.040, -0.028, 0.010, 0.077
0.040, 0.006, -0.025, -0.058, -0.059, -0.014, 0.050
0.000, -0.065, -0.096, -0.121, -0.119, -0.076, -0.011

fcwilt

Thanks.

Try printing a test from 50 to 250 on both X and Y.

That should put it away from the edges which are the highest parts.

Frederick

RODOKAS

@fcwilt
print centered 200mm squares
edge x50,y50

edge x200,y50

fcwilt

Thanks.

It looks a bit better.

Did you create the height map with the bed heated to a typical temperature you would commonly use?

If not try re-creating the height map with the bed heated.

Frederick

RODOKAS

@fcwilt
yes, i have 3 height maps created for each material i use, at different temperatures, and i update them almost every day

Phaedrux

Are you sure your probe offsets are correct?

-X to the left of the nozzle, +X to the right
-Y to the front of the nozzle, +Y to the back

RODOKAS

@Phaedrux yes this is correct, thanks for the tip. I've really looked at a lot, the reprap code is not so complicated now for me but I still don't know what may be happening. can speed, acceleration or jerk on the z axis influence?

Phaedrux

@RODOKAS said in problem with irregular bltouch mesh:

M574 Z1 S1 P"zstop+e1stop"

Are you doing independent lead screw leveling as well?

@RODOKAS said in problem with irregular bltouch mesh:

M350 X16 Y16 Z16:16 E16 I1 ; Micropassos cem interpolação M92 X80.00 Y80.00 Z800.00:800.00 E416,5 ; set steps per mm M566 X400.00 Y400.00 Z60.00:60.00 E2000.00 P1 ; set maximum instantaneous speed changes (mm/min) JERK M203 X12000.00 Y12000.00 Z720.00:720.00 E2100.00 ; set maximum speeds (mm/min) M201 X2300.00 Y2300.00 Z240.00:240.00 E9000.00 ; set accelerations (mm/s^2) ;M204 P2600 T2000 ; set accelerations travel (mm/s^2) M906 X1150 Y1150 Z1150:1150 E700 I30 ; set motor currents (mA) and motor idle factor in per cent M84 S20 ; Set idle timeout

Where you have double Z values you shouldn't. The Z axis is a single axis, so remove the double values. Ex: Z1150:1150

E416,5

Your E steps per mm has a comma instead of a period.

Can you send M98 P"config.g" and post the results?

Also post your homeall and your slicer start gcode.

RODOKAS

@Phaedrux
my steps are really wrong, thanks!
should I remove all double settings for the second z?
yes, I do the leveling by optical endstop on each axis then I do it again by bltouch.

I made corrections

M98 P"config.g"
HTTP is enabled on port 80
FTP is enabled on port 21
TELNET is disabled
Warning: Heater 0 appears to be over-powered. If left on at full power, its temperature is predicted to reach 205C
Warning: Heater 1 appears to be over-powered. If left on at full power, its temperature is predicted to reach 676C
Warning: Heater 0 appears to be over-powered. If left on at full power, its temperature is predicted to reach 205C
Warning: Heater 1 appears to be over-powered. If left on at full power, its temperature is predicted to reach 676C

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri Jun 05 2020 16:15:12 GMT-0300 (Horário Padrão de Brasília)

G91                     ; relative positioning
G1 H2 Z2 F900         ; lift Z relative to current position
G1 H1 X-305 Y-315 F6000 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-305             ; home X axis
G1 H1 Y-315             ; home Y axis
G1 X3 Y3 F6000          ; go back a few mm
G1 H1 X-305 F600        ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-315             ; then move slowly to Y axis endstop
G90                     ; absolute positioning
G1 X5 Y5 F6000      ; go to first bed probe point and home Z

start script
G28 ;
; Filament gcode
G29 S1 P"ABS.CSV"; Carrega malha para ABS
G1 X5 Y1 Z0.2 F9000;
G92 E0; Reset no extrusor
G1 E20 F1000.0 ; comeca a limpeza
G1 X7.0 F100
G1 X80.0 E23 F2000.0 ; Termina de fazer a limpeza
G92 E0;
M572 D0 S0.05; avanco de pressao reprap
;M593 F40; aceleracao dinamica reprap
;M376 H5; altura para diminuir a compensacao da mesa

prusa slicer

Phaedrux

@RODOKAS said in problem with irregular bltouch mesh:

should I remove all double settings for the second z?

Yes. It's not really a second Z. There is only 1 Z axis, even if made up of multiple motors. If you want to control the motors separately, you'd need to create an entirely separate axis like U and then you'd have settings for that axis. In fact, before RRF3 you would have needed to do that to do the dual endstop leveling and home each axis separately and then recombine into a single Z axis.

I should have asked for your bed.g as well.

RODOKAS

@Phaedrux

; bed.g
; called to perform automatic bed compensation via G32
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri Jun 05 2020 16:15:10 GMT-0300 (Horário Padrão de Brasília)
M561 ; clear any bed transform

Thanks!

RODOKAS

@Phaedrux
this is the macro I use to read and create the mesh for ABS

;macro /macros/__prepare_ABS.g  prepare the machine after a cold start for ABS printing
T0			; define tool
M190 S95	; Set the bed temperature at 95°C and wait for it
G28			; home
G29	S2		; Limpa a malha
G29 S0      ; executa leitura da cama
G29 S3 P"ABS.csv"    ; salva a leitura como ABS
G29 S1 P"ABS.csv"    ; carrega a malha ABS
G1 X5 Y5 F7200
M500;

fcwilt

@RODOKAS said in problem with irregular bltouch mesh:

this is the macro I use to read and create the mesh for ABS

;macro /macros/__prepare_ABS.g  prepare the machine after a cold start for ABS printing
T0			; define tool
M190 S95	; Set the bed temperature at 95°C and wait for it
G28			; home
G29	S2		; Limpa a malha
G29 S0      ; executa leitura da cama
G29 S3 P"ABS.csv"    ; salva a leitura como ABS
G29 S1 P"ABS.csv"    ; carrega a malha ABS
G1 X5 Y5 F7200
M500;

Hi,

It doesn't seem as if your homing macro is setting the Z=0 datum using G30
As I recall you don't need to use G29 S2 right before using G29 S0 - it won't cause problems if you leave it
You don't need to use G29 S1 to load the just created height map, the map is still active
What is the point of the M500?

Frederick

RODOKAS

I was curious about the m561 in my beg.g and took it out to test it, did the mesh in abs again and restarted the machine to make sure, I did the same print test as before and the result was the same.

Phaedrux

Your homeall doesn't have a z homing component, so please post homez as well.

Where are you doing the Z axis leveling? In homez?

Could you post all of your files in a single post? That would make it much easier to see what's going on without having to scroll around all over the place. The only way we can see what's going on is be looking at the gcode.

RODOKAS

@Phaedrux you are right, i will put all gcodes here.

;config.g
; Configuration file for Duet WiFi (firmware version 3)
                 ; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"3DPRINT"                                    ; set printer name
M669 K1                                            ; select CoreXY mode
                        ; Network
M552 S1                                            ; enable network
;M552 S2     									;Habilitar ponto de acesso
M586 P0 S1                                         ; enable HTTP
M586 P1 S1                                         ; enable FTP
M586 P2 S0                                         ; desabilitado Telnet
                          ; Drives
M569 P0 S0 F3                                     ; physical drive 0 goes forwards	
M569 P1 S0 F3                                     ; physical drive 1 goes forwards	
M569 P2 S1 F3                                     ; physical drive 2 goes backwards	
M569 P3 S1 F3                                        ; physical drive 3 goes backwards
M569 P4 S1                                     ; physical drive 4 goes backwards	
M584 X0 Y1 Z2:3 E4                                 ; set drive mapping
M350 X16 Y16 Z16 E16 I1             	            ; Micropassos cem interpolação
M92 X80.00 Y80.00 Z800.00 E416.5           ; set steps per mm
M566 X400.00 Y400.00 Z60.00 E2000.00 P1            ; set maximum instantaneous speed changes (mm/min) JERK
M203 X12000.00 Y12000.00 Z720.00 E2100.00   ; set maximum speeds (mm/min)
M201 X2300.00 Y2300.00 Z240.00 E9000.00       ; set accelerations (mm/s^2)
;M204 P2600 T2000  							       ; set accelerations travel (mm/s^2)
M906 X1150 Y1150 Z1150 E700 I30               ; set motor currents (mA) and motor idle factor in per cent
M84 S20                                            ; Set idle timeout
                                ; Z-Probe
M98 P"0:/macros/configuracao_sonda"
                                  ; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950     ; 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 A180.2 C510.1 D2.9 S0.75 V12.8 B0          ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S115                                       ; set temperature limit for heater 0
;M308 S1 P"e0temp" Y"thermistor" T100000 B4267     ; configuração conforme opção 5 do marlin
M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C0.0000000706      ; configuração conforme recomendação do duet3d
M950 H1 C"e0heat" T1                               ; create nozzle heater output on e0heat and map it to sensor 1
;M307 H1 B1										   ; ativa o modo bang bang
M307 H1 A651.7 C191.8 D6.3 S1.00 V12.7 B0          ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S250                                       ; seta o limite de temperatura para o extrusor
                                  ; Fans
M950 F0 C"fan0" Q500                               ; create fan 0 on pin fan0 and set its frequency
M106 P0 C"fan0" S0 H-1                             ; set fan 0 name and value. Thermostatic control is turned on
;M950 F1 C"fan1" Q500                              ; create fan 0 on pin fan0 and set its frequency
;M106 P1 C"PLACA" S1 H1 T40                        ; set fan 0 name and value. Thermostatic control is turned on
M950 F2 C"fan2" Q200                               ; create fan 2 on pin fan2 and set its frequency
M106 P2 C"FONTE" S0.8 H1 T180                        ; set fan 2 name and value. Thermostatic control is turned off
M950 F1 C"e1heat" Q500                             ; create fan 1 on pin HEATER2 and set its frequency
M106 P1 C"HOTEND" S1 H1 T60                        ; set fan 1 name and value. Thermostatic control is turned off
                                 ; Axis Limits
M208 X-3 Y0 Z0 S1                                  ; set axis minima
M208 X300 Y300 Z345 S0                             ; set axis maxima
                                  ; Endstops
M574 X1 S1 P"xstop"                                ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                                ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S1 P"zstop+e1stop"
                                  ; Tools
M563 P0 D0 H1                                 ; 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
                              ; Miscellaneous
M911 S11 R11.5 P"M913 X0 Y0 G91 M83 G1 Z1 E-2 F1000" ; set voltage thresholds and actions to run on power loss

M501

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri Jun 05 2020 16:15:12 GMT-0300 (Horário Padrão de Brasília)

G91                     ; relative positioning
G1 H2 Z2 F900         ; lift Z relative to current position
G1 H1 X-305 Y-315 F6000 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-305             ; home X axis
G1 H1 Y-315             ; home Y axis
G1 X3 Y3 F6000          ; go back a few mm
G1 H1 X-305 F600        ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-315             ; then move slowly to Y axis endstop
G90                     ; absolute positioning
G1 X5 Y5 F6000      ; go to first bed probe point and home Z

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri Jun 05 2020 16:15:12 GMT-0300 (Horário Padrão de Brasília)
G91               ; relative positioning
G1 H1 Z-350 F900  ; move Z down until the endstop is triggered
G1 Z3 F900
G1 H1 Z-5 F150
G92 Z0            ; set Z position to axis minimum (you may want to adjust this)
G1 H1 Z3 F900
G1 Z2.9
G30

; bed.g
; called to perform automatic bed compensation via G32
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri Jun 05 2020 16:15:10 GMT-0300 (Horário Padrão de Brasília)
;M561 ; clear any bed transform

;macro /macros/__prepare_ABS.g  prepare the machine after a cold start for ABS printing
T0			; define tool
M140 S95 	; Set the bed temperature and don't wait for it
M190 S95	; Set the bed temperature at 95°C and wait for it
G28			; home
G29	S2		; Limpa a malha
G29 S0      ; executa leitura da cama
G29 S3 P"ABS.csv"    ; salva a leitura como ABS
G29 S1 P"ABS.csv"    ; carrega a malha ABS
G1 X5 Y5 F7200
M500;

I really don't know if the M500 makes a difference at the end of the ABS macro

Phaedrux

@RODOKAS said in problem with irregular bltouch mesh:

I really don't know if the M500 makes a difference at the end of the ABS macro

It doesn't do anything in this case because there hasn't been anything calculated or measured to save to config-override.g.