Voron 2.4 Homing for XYZ Help

[Ghazi]

@Karim My configuration might look different. The first config file in this post looks fine, but after switching A and B motors in the motor mapping M584 X1 Y0 Z5:6:7:8 E3. I attached a simple image for the x and y axes and where the original is on the printing bed (0,0) in the configuration
The point in green would be (350,350 ,0) after homing if you keep your current homing files.

[Karim]

@Ghazi So you moving in the Negative to home X & Y.

[Ghazi]

@Karim Yes

[Karim]

@Ghazi ok X & Y is moving in the Negative when homing. I need to work on Z end stop, I am not using a probe.

[Ghazi]

@Karim IF you are using a switch endstop for z, first align the extruder to be above the z endstop. I use a G1 command then the position in X and Y before switch to relative position. The position of my z endstop is (X=230,Y=0)

; homez.g
 
G1 X230 Y0        ; align the extruder to be above the z endstop
G91               ; relative positioning
 

[Karim]

@Ghazi Here is my Z homing.

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.3.13 on Fri Oct 14 2022 18:23:21 GMT-0400 (Eastern Daylight Time)
G91              ; relative positioning
G1 X115 Y0        ; align the extruder to be above the z endstop
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Z-355 F1800 ; move Z down until the endstop is triggered
G1 Z5 F100        ; lift Z relative to current position
G92 Z0            ; set Z position to axis minimum (you may want to adjust this)

; homeall.g
; called to home all axes
; generated by RepRapFirmware Configuration Tool v3.3.13 on Fri Oct 14 2022 18:23:21 GMT-0400 (Eastern Daylight Time)
G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-355 Y-355 F1800 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-355             ; home X axis
G1 H1 Y-355             ; home Y axis
G1 X5 Y5 F6000          ; go back a few mm
G1 H1 X-355 F360        ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-355             ; then move slowly to Y axis endstop
G1 X115 Y0              ; align the extruder to be above the z endstop
G1 H1 Z-355 F360        ; move Z down stopping at the endstop
G1 Z5 F100              ; lift Z relative to current position
G92 Z0                  ; set Z position to axis minimum (you may want to adjust this)

[Ghazi]

@Karim if you move x or y before homing z, it would not work correctly
just switch line 5 and 6 to be like this,

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.3.13 on Fri Oct 14 2022 18:23:21 GMT-0400 (Eastern Daylight Time)
G1 X115 Y0        ; align the extruder to be above the z endstop
G91              ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Z-355 F1800 ; move Z down until the endstop is triggered
G1 Z5 F100        ; lift Z relative to current position
G92 Z0            ; set Z position to axis minimum (you may want to adjust this)

[Karim]

@Ghazi ok , after z endstop does x and y home. Also does the nozzle go back to the xy stop.

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.3.13 on Fri Oct 14 2022 18:23:21 GMT-0400 (Eastern Daylight Time)
G1 X115 Y0        ; align the extruder to be above the z endstop
G91              ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Z-355 F1800 ; move Z down until the endstop is triggered
G1 Z5 F100        ; lift Z relative to current position
G92 Z0            ; set Z position to axis minimum (you may want to adjust this)

[Karim]

Can you help with this:

;Bed (Keenovo 750w 120v)
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 S120                                       ; set temperature limit for heater 0 to 120C
 
;E3d Revo Voron)
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

[Karim]

Thanks Guys.

[Phaedrux]

@Karim said in Voron 2.4 Homing for XYZ Help:

Can you help with this:

I'm not sure what you're asking for help with. Those are heater configuration commands, but what seems to be the issue?

[Karim]

@Phaedrux hey I am trying to set up the bed and hotend, I am looking for a starting point. I don’t know if this is ok. This was generated with the configurator. I don’t know the thermistors value.

[Phaedrux]

Ideally you'd be able to find the thermistor values from the manufacturer. Those values are pretty generic, so should read something at least, but they may not be super accurate at printing temp.

[Phaedrux]

Nevermind I see you have a dedicated thread. Assuming your homing is now working for you I'll mark this thread as solved.