G29 probing sequence, strange behavior
-
Hi, I have the bed on my cartesian printer setup so that the center of the bed is at the co-ordinates X0 and Y0.
I want to use the G29 probing sequence to probe the bed and create a height map.
To do this I first send the following command to the printer:
m557 x-175:130 y-95:110 s15
I can verify this by using the m557 command without any parameters, and the console verifies that it has accepted these co-ordinates.
When I then run The G29 command in the 'Compensation and calibration' menu in the browser, it proceeds to the co-ordinate of X-193, crashes and makes me sad.
Why? -
Here is my config.g:
; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.0 on Sat Jan 02 2021 15:54:53 GMT+1100 (Australian Eastern Daylight Time); General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Black Widow" ; set printer name; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S1 ; enable FTP
M586 P2 S0 ; disable Telnet; Drives
M569 P0 S0 ; physical drive 0 goes backwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S0 ; physical drive 3 goes backwards
M584 X0 Y1 Z2 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X81.00 Y81.00 Z1635.00 E420.00 ; set steps per mm (X & Y were 80=19.75mm using 81=20mm)(z 1700 = 20.75mm 1640 = 20.2mm will now try 1635 stps/mm)
M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 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 X370 Y250 Z300 S0 ; set axis maxima
M208 X-205:165 Y-140:110 ; set axis limits; Endstops
M574 X1 S1 P"!xstop" ; configure active-high endstop for low end (or high end?) on X via pin xstop (was M574 X1 S0 P"xstop")
M574 Y1 S1 P"!ystop" ; configure active-high or low? endstop for low end on Y via pin ystop (S0 = no endstop) ;if you are using RepRapFirmware 3 then you will need to use S1 but invert the polarity by putting a ! character at the start of the pin name in the M574 command
M574 Z1 S2 ; configure Z-probe endstop for low end on Z; Z-Probe
M950 S0 C"exp.heater3" ; 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 X48 Y-18 Z2.184 ; set Z probe trigger value, offset and trigger height
M557 X15:355 Y15:235 S20 ; 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 S135 ; set temperature limit for heater 0 to 135C
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 S1.00 ; 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 P1 S0 H-1 ; set fan 1 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P0 T45 H1 ; set fan 0 value. Thermostatic control is turned on; Tools
M563 P0 S"Extruder" 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
; Miscellaneous
M575 P1 S1 B57600 ; enable support for PanelDueM501 ; load values stored in config-override.g
-
Did you take into account the X and Y offsets of the Z probe?
You have to allow for them when you set the values in the M557.
Frederick
-
@fcwilt Thanks, I did take them into account when I measured the probing positions of X and Y, but now that you mention it, I think I need to check again. I'm not at the printer now, but I'll look in the morning and let you know.
-
m557 x-175:130 y-95:110 s15
G31 P500 X48 Y-18 Z2.184 ; set Z probe trigger value, offset and trigger heightto probe x-175 the nozzle needs to go to x-223 to probe there
-
