Printer Not hitting any of the endstops

jay_s_uk

@rodneysramosj said in Printer Not hitting any of the endstops:

M208 X0:1060 Y0:530 Z0:1000 ; set minimum and maximum axis limits

this shows your printer only being 1060mm wide. This number should be the same as the maximum print size, otherwise your motors will end up moving short

rodneysramosj

@jay_s_uk said in Printer Not hitting any of the endstops:

M208

We have set the dimensions correctly in the g code and has not resolved the issue and the printer only gives a slight movement in all directions depending on the home and says that it is home and hasn't hit any estops.

jay_s_uk

@rodneysramosj have you tested the endstops?
You can either look at DWC for this, a green box appears on each axis letter to show you its triggered, or use M119.
They should show not triggered when not pressed and triggered when pressed.
If they are the wrong way round, you will need to invert them by adding a ! to the pin name for each applicable endstop

droftarts

@rodneysramosj As @jay_s_uk said, and I already posted, check the endstops are functioning correctly: https://docs.duet3d.com/en/How_to_guides/Commissioning#h-8-check-endstops

Ian

rodneysramosj

@jay_s_uk endstops are wired correct and they are triggering correctly through config. however, it is moving in the wrong direction now and in the opposite direction from the endstops. we tried changing it in the config tool from low end to high end and now they are currently swapped back after troubleshooting.

fcwilt

@rodneysramosj said in Printer Not hitting any of the endstops:

@jay_s_uk endstops are wired correct and they are triggering correctly through config. however, it is moving in the wrong direction now and in the opposite direction from the endstops. we tried changing it in the config tool from low end to high end and now they are currently swapped back after troubleshooting.

If the movement is not towards the end-stops you need to check your homing code to see if it is using moves in the correct direction.

Frederick

rodneysramosj

@fcwilt we got it to a point where it hits the endstops but it stays stopped on the endstops and doesnt come back out.

fcwilt

@rodneysramosj said in Printer Not hitting any of the endstops:

@fcwilt we got it to a point where it hits the endstops but it stays stopped on the endstops and doesnt come back out.

Does your code command it to back out?

Frederick

rodneysramosj

@fcwilt were trying to make it retract here is our code it is currently hitting the end stop and then continues to go past the Endstop until the endstop is hit again then it fully stops. changing the back off distance from positive to negative doesn't change the way it moves. it is currently set to 5 for visibility. we are testing the endstops by hand and not by carriage. ```

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.5.10 on Wed Mar 19 2025 10:03:37 GMT-0400 (Eastern Daylight Time)

; increase Z
;G91 ; relative positioning
;G1 H2 Z5 ; move Z relative to current position to avoid dragging nozzle over the bed
;G90 ; absolute positioning

; home X
G91 ; relative positioning
var maxTravel = move.axes[0].max - move.axes[0].min + 5 ; calculate how far X can travel plus 5mm
G1 H1 X{var.maxTravel} F1200 ; coarse home in the -X direction
G4 P500
G1 X-75 F6000 ; move back 5mm
M400 
G1 H1 X{var.maxTravel} F300 ; fine home in the -X direction
G90 ; absolute positioning

; decrease Z again
;G91 ; relative positioning
;G1 H2 Z-5 F6000 ; move Z relative to current position
;G90 ; absolute positioning

```

droftarts

@rodneysramosj Is the X endstop a max endstop or min endstop? Currently your G1 H1 X... homing moves are positive, so should be moving to the right, towards a max endstop. If this is wrong, you probably need to check the direction the motors are moving is correct, see https://docs.duet3d.com/en/How_to_guides/Commissioning#h-10-check-stepper-motors

Your printer origin X0 Y0 Z0 should be in the front left corner. Positive X moves should move the nozzle to the right, positive Y moves should move the nozzle towards the back.

Ian