Calibrate Z Probe.
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Voron 2.4 3 MB 6 + 3 EB
Greetings,
I am trying to calibrate the Z probe height using this procedure https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_heightThis is what I have been doing:
G28
M561
Jog the Z down to it touches the paper.
G92 Z0
Jog the Z up 5mm
G30 S-1
The Z then travels down at stops at +1.2.
Repeating the procedure gives the same results.Is there something overriding the result or am I doing something incorrectly?
Thanks
TADConfig.g
; Configuration file for Duet 3 MB 6HC (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Wed Jan 04 2023 15:34:18 GMT+0100 (Mitteleuropäische Normalzeit); General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Voron" ; set printer name
M669 K1 ; select CoreXY mode; Wait a moment for the CAN expansion boards to start
G4 S2; Network
M552 P192.168.2.163 S1 ; enable network and set IP address
M553 P255.255.255.0 ; set netmask
M554 P192.168.1.254 ; set gateway
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet;Bed mapping
M671 X-60:-60:357:357 Y-6:365:365:-6; Drives
M584 X0.4 Y0.5 Z0.0:0.1:0.2:0.3 E1.0M569 P0.4 S0 ; A goes forwards
M569 P0.5 S0 ; B goes BackwardsM569 P0.0 S1 ; FL goes forwards
M569 P0.1 S0 ; RL goes backwards
M569 P0.2 S1 ; RR goes forwards
M569 P0.3 S0 ; FR goes forwardsM569 P1.0 S0 ; physical drive 1.0 goes forwards
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E720.03 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X60000.00 Y60000.00 Z18000.00 E1200.00 ; set maximum speeds (mm/min)
M201 X6000.00 Y6000.00 Z4000.00 E250.00 ; set accelerations (mm/s^2)
M906 X1600 Y1600 Z1400 E400 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S10 ; Set idle timeout; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X295 Y295 Z250 S0 ; set axis maxima; Endstops
M574 X2 S1 P"^io1.in" ; configure switch-type (e.g. microswitch) endstop for high end on X via pin ^io1.in
M574 Y2 S1 P"^io2.in" ; configure switch-type (e.g. microswitch) endstop for high end on Y via pin ^io2.in
M574 Z1 S1 P"^io3.in" ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin ^io3.in; Z-Probe
M558 P5 C"^io4.in" H10 F120 T6000 ; set Z probe type to switch and the dive height + speeds
G31 P500 X0 Y25 Z0.8 ; set Z probe trigger value, offset and trigger height
M557 X15:265 Y15:265 S20 ; define mesh grid; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out0 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 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1 ; create nozzle heater output on out1 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"out9" Q500 ; create fan 0 on pin out9 and set its frequency PARTS FAN
M106 P1 S1 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out7" Q500 ; create fan 1 on pin out7 and set its frequency TOOL FAN
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on; Tools
M563 P0 S"Revo" D0 H1 F1 ; define tool 0
M563 P2 D0:1 H1:2 X0:3 F0:2
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
; Miscellaneous
M501 ; load saved parameters from non-volatile memory
T0 ; select first tool -
If you are saying that the Z movement stops when th eprobe triggers and the result is 1.2mm each time, then you need to adjust this line in your config.g
G31 P500 X0 Y25 Z0.8 ; set Z probe trigger value, offset and trigger heightto
G31 P500 X0 Y25 Z1.2 ; set Z probe trigger value, offset and trigger heightor send M500 to have the new value stored in config-overide.g
If you adjust config.g then make sure there is no G31 command in config-overide.g
The 1.2mm is the offset distance between the nozzle and the probe trigger point, so it should remain static unless you move the nozzle or probe.
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@OwenD
Thanks.
I have done that several times, I now have 1.18 in that line.
If I now zog down to Z0 the nozzle is too far into the bad, the paper cannot be removed.Repeating the process gives, once again, 1.2.
There is no G31 in config-overide.g
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@Titus-A-Duxass
I'm assuming that you are restarting the machine after editing the G31 value in config.g
By your config you're using a limit switch.
Try reducing the F parameter in your M558 command even further to check if it's more accurate.
You can set two speed probing like this
M558 P5 C"^io4.in" H10 F600:60 T6000 -
@OwenD
I am restarting the mainboard as required after a config.g change, but I am not restarting the printer. -
@Titus-A-Duxass
At present G31 is 3.3
So having done G92 Z0, G1 Z5, G30 the toolhead returns to 0.76, I get this result repeatedly.
What I do not understand is having to enter 0.76 in the G31 line. Going from 3.3 to 0.76 is a huge change which makes no sense to me. -
@Titus-A-Duxass
At this moment the printer is unusable, uploading a print from both S3D and Cura results in the nozzle dragging across the bed. -
@Titus-A-Duxass Did you do
G92 Z0with the nozzle touching the bed ?
I feel like you sentG92 Z0again immediately afterG30 S-1returned its result. -
@Falcounet To be honest I cannot remember. I did find a mistake in my homez.g
G92 Z4 - I think that is incorrect and have changed to Z0.
Now when I jog down to the Z0 it stops 1.39mm above 0 and, naturally, I cannot jog below 0. -
@Titus-A-Duxass If you use a probe, you should use G30 for homing, not G92 Zx
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@Falcounet I have both the probe and the Z endstop switch.
I want to use the switch to set the height as I feel the probe is not so accurate.I have changed the G92 entry in homez.g to 1.4 and now when I do the procedure I get a constant 0.43 but now I get a report in the console, I have never seen a feedback report until I changed the entry in homez.g
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@Titus-A-Duxass If you don't use G30 to home, the G31 line is useless and the Z position is set by the endstop trigger and the value you use with G92 Zx.
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@Falcounet I think I have it now. I have set the G92 entry in homez.g to the height difference between the Z endstop switch trigger point and the height of the bed (1.5mm) and now it prints - it's only taken me 6 hours to find the solution.
