BLTouch w/ DUet 3 mini 5+ Wifi (Ender 3 Pro)

Phaedrux

@teachmedavis747 said in BLTouch w/ DUet 3 mini 5+ Wifi (Ender 3 Pro):

How can I fix the homing files to compensate for this change?

There are 3 parts to this. The direction of motor rotation, the endstop position definition, and the movement direction in the homing macros.

-x should move left, +x should move right
-y should move to the front, +y should move to the back

M569 is where the rotation direction is set

M574 defines where the endstops are located. high end of travel (positive move to reach) or low end of travel (negative move to reach)

The G1 H moves in the homing macros should move towards the endstop either positive or negative.

If you require more guidance we'd need to at least know where your endstops are physically located to know if your config is correct.

Gixxerfast

@teachmedavis747 Hmm, from the top of my head I know of no special homing or probe related changes needed to fix that. Are you sure your Z-motor doesn't need reversing as well?

When you home x and y does z move in the right direction. Up and then down again?

teachmedavis747

@gixxerfast Yes. Z-axis moves well.

teachmedavis747

@phaedrux Sure.

On the ender 3 the x-axis endstop pin is located on the far left of the x-axis. The y-axis is located at the back of the printer next to the y-axis stepper motor. I believe I have it set at low end for both when I configured the file using the RepRap tool.

So if I changed the direction in 569 for both the x and y-axis motors... what others changes would be needed to get it to g28 in the right direction?

y endstop.jpg x endstop.jpg

Gixxerfast

@teachmedavis747 said in BLTouch w/ DUet 3 mini 5+ Wifi (Ender 3 Pro):

When I enter G28 the extruder travels in the wrong direction. Instead of going towards the pin, it travels the opposite direction.

Just do be clear can you explain what you mean here exactly?

Your homeall.g is not correct as it moves the y in the wrong direction. You should try to go to relative -(max bed size x + some more) and -(max bed size y + some more)

Also, I would split that so I first home x, then y and lastly z.

In my homeall.g I just call homex.g, homey.g and homez.g instead of repeating the commands again.

Phaedrux

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Jan 02 2022 00:25:05 GMT-0700 (Mountain Standard Time)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Y240 F3000 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y5 F6000    ; go back a few mm
G1 H1 Y240 F240  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

The Y endstop is at the min, so all the Y homing moves in here should be negative, but all your moves are positive, so that needs to be fixed.

@phaedrux said in BLTouch w/ DUet 3 mini 5+ Wifi (Ender 3 Pro):

-x should move left, +x should move right
-y should move to the front, +y should move to the back

Can you confirm this is the case? Note that for Y, movement of the bed is relative to the print head. So even though the bed moves forward, the print head is now at the rear of the bed, and vice versa.

teachmedavis747

@phaedrux

confirmed. When i go to MOVE on my display if I hit +1 the x axis moves rights. However, you were correct. The y-axis was moving the wrong direction. Here's the format I think you were referencing.

So I changed the config.g 569 to match this and now all is moving in the correct direction.

M569 P0.0 S0                                       ; physical drive 0.0 goes backwards
*M569 P0.1 S1                                       ; physical drive 0.1 goes forwards*
M569 P0.2 S1                                       ; physical drive 0.2 goes forwards
M569 P0.3 S0                                       ; physical drive 0.3 goes backwards

Edit: I also changed the homey. Is this correct?

G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Y-240 F3000 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y5 F6000    ; go back a few mm
G1 H1 Y-240 F240  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

teachmedavis747

@gixxerfast

Instead of the print head moving toward the endstop pin... it travels to the right.. away from the pin.

Edit:

Can you send me an example of what that would look like... as far as separating the x and y and z?

Gixxerfast

@teachmedavis747

Yes i understand. I first assumed you were talking about the probe pin and the extruder going up/down in the wrong direction.

Btw, also edit your homeall.g with the changes you've made in homey.g above.

Gixxerfast

@teachmedavis747

Well it doesn't matter at all with the Ender as you can reach the endstops no matter where the other axis is but only as a personal preference.

You can disregard that comment

It's something like this I guess:

G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X-240 F3000 ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X5 F6000    ; go back a few mm
G1 H1 X-240 F240  ; move slowly to X axis endstop once more (second pass)

G1 H1 Y-240 F3000 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y5 F6000    ; go back a few mm
G1 H1 Y-240 F240  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

Just as an example.

teachmedavis747

@gixxerfast

So after much etsting I realized that the printer is not reading the homex and homey correctly. It completely skips the "H1" commands. For example:

G1 H1 X-240 F3000 ; move quickly to X axis endstop and stop there (first pass)

Therefore, it never actually homes x and y to the endstop pins. I tried to change it to H2

e.g. G1 H2 X-240 F3000 ; move quickly to X axis endstop and stop there (first pass)

and it worked, however, it does not recognize the endstop pin. I'm stuck again. Any help here is greatly appreciated as always. Thank you.

G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X-240 F3000 ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X5 F6000    ; go back a few mm
G1 H1 X-240 F240  ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

Gixxerfast

@teachmedavis747

If it doesn't try to move -240 when in relative mode (G91) with the H1 parameter I guess that the endstop is maybe already triggered.

Check endstop status with the M119 command and see.

Otherwise I'm a bit stumped...

teachmedavis747

@gixxerfast

I think you are correct. Without hitting either of the stops M119 reads:

m119 Endstops - X: at min stop, Y: at min stop, Z: no endstop, Z probe: not stopped

Edit:

I read another discussion and found this would finally work to get the print head to move towards the end stop... but the endstop pin is still not being recognized.

M574 X1 S1 P"!^io5.in"                              
M574 Y1 S1 P"!^io6.in"

Gixxerfast

@teachmedavis747 With Duet 3 boards you don’t need to explicitly enable pullups. So try to remove the ^ but keep the inverse (!) I guess you reverted back to the H1 parameter? Also check with M119 after you made the changes. Try holding in the endstops and check with M119 again.

teachmedavis747

@gixxerfast

Yes so with or without the "^" the "!" works. But now I ran into the other issue of the end stops reading properly. I guess the next step is to check the wiring on those and see what I can do. Thanks for your help on this. Hope you had a good weekend.

Phaedrux

Yes please show us how the endstops are wired at the board.

H2 will move the axis regardless of the endstop. Not what you want to do.

teachmedavis747

@phaedrux

Okay. Thanks. Here is a photo.

2022-01-17 16.47.jpg

Phaedrux

@teachmedavis747 said in BLTouch w/ DUet 3 mini 5+ Wifi (Ender 3 Pro):

But now I ran into the other issue of the end stops reading properly.

What exactly do you mean by this?

Wiring looks ok,

When you check the endstop status with M119 when the switches are pressed and not, what does it say?

teachmedavis747

@phaedrux

m119 Endstops - X: at min stop, Y: at min stop, Z: no endstop, Z probe: not stopped

this is when they are not pressed

Phaedrux

And when they are pressed? Does it change?

What is your M574 now?