Need help with Ender-6 core xy motor movement

davidewen

I'm installing a Duet 3 mini 5+ on an Ender-6

X homes in the wrong direction
Y homes correctly
(at least for the Ender-6)

Both motors are at the back corners
X is back left
Y is back right

Endstops are at max positions
X is on the right side
Y is at the back right

Checking the motor movement per:
https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCoreXYPrinter#Section_Testing_motor_movement

using
G91
G1 H2 X10 F3000 (carriage moves diagonal left and back)
G1 H2 Y10 F3000 (carriage moves diagonal left and front)

config.g attached
config(1).g

peter247

@davidewen

My guess is try :

; Drives
M569 P0.0 S1
M569 P0.1 S1

then

; Drives
M569 P0.0 S0
M569 P0.1 S0

then is trial and error until you find it turning in the right direction .

Just make sure that

G91
G1 H2 X10 F3000 ; goes right
G1 H2 Y10 F3000 : goes towards the back

davidewen

@peter247
Thanks for the response.

I've tried these configs.

M569 P0.0 S0 ; physical drive 0.0 goes backwards
M569 P0.1 S1 ; physical drive 0.1 goes forwards
Y homes correctly

M569 P0.0 S1 ; physical drive 0.0 goes forwards
M569 P0.1 S1 ; physical drive 0.1 goes forwards
X homes towards Y front

M569 P0.0 S0 ; physical drive 0.0 goes backwards
M569 P0.1 S0 ; physical drive 0.1 goes backwards
X homes towards Y endstop in rear

M569 P0.0 S1 ; physical drive 0.0 goes forwards
M569 P0.1 S0 ; physical drive 0.1 goes backwards
X homes correctly

David

peter247

@davidewen said in [Need help with Ender-6 core xy motor movement]

Just make sure it is moving correct .

You may have problem with the homing files or other configs .

peter247

@davidewen

post homeall.g

davidewen

@peter247

homeall.g attached
homeall.g

peter247

@davidewen

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Fri Jul 23 2021 13:25:10 GMT-0700 (Pacific Daylight Time)
G91                  ; relative positioning
G1 H2 Z5 F12000      ; lift Z relative to current position
G1 H1 X255 Y255 F900 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X255           ; home X axis
G1 H1 Y255           ; home Y axis
G1 X-5 Y-5 F12000    ; go back a few mm
G1 H1 X255 F450      ; move slowly to X axis endstop once more (second pass)
G1 H1 Y255           ; then move slowly to Y axis endstop
G90                  ; absolute positioning
G1 X47 Y15 F12000    ; go to first bed probe point and home Z
G30                  ; home Z by probing the bed

; Uncomment the following lines to lift Z after probing
;G91                 ; relative positioning
;G1 Z5 F200          ; lift Z relative to current position
;G90                 ; absolute positioning

Confused , why are you lift the tool head , homing twice , lower the tool head and homing again .

M913 X50 Y50 Z50 ; set X Y Z motors to 50% of their normal current
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X 330 F3000 ; move quickly to X axis endstop and stop there (first pass)
G1 H1 Y 330 F3000 ; move quickly to Y axis endstop and stop there (first pass)
;G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning
M913 X100 Y100 Z100 ;

This is my X Y part of homeall.g

davidewen

@peter247

Peter,
This is all from the RRF Config Tool. https://configtool.reprapfirmware.org

I have not written any of the code.

I'm guessing that is for the EZAble Z-probe. Similar to the Prusa z-probe.

peter247

@davidewen Homeall.g is crazy but it still should home in the right direction .

Have you tried swapping the x , y stepper motors wires and tried the 4 motor possibilities ?

davidewen

@peter247

I have not swapped wires.
Correct me if I'm wrong, but isn't changing motor direction the same as changing the wires? So that would be redundant.

peter247

@davidewen True , but you are also changing X , Y to Y , X
I don't mean change the wires of each motor , but swap left to right motor.

davidewen

@peter247

Again, that would give me the same results, but with added effort of changing code.

I've done a little more testing. This time by phyiscal force.
I manually moved the X / Y axis and watched the motor directions.

X - both motors move in the same direction
Y - motors move opposite of each other

So, somehow I need to figure out how to make Duet do the same.

peter247

@davidewen Yes , mine is in the same direction on both motors .
But you still may need to swap motors .

Phaedrux

Check out these two posts they might help you get things straightened out.

https://forum.duet3d.com/topic/14971/vcore-pro-core-xy-the-x-and-y-axis-home-issue/4

https://forum.duet3d.com/topic/12676/mirrored-x-axis/9

The gist of it is to choose where the front of your printer is when looking at it straight on. 0,0 is the front left corner. X+ moves to the right, X- moved to the left, Y+ moves to the back, Y- moves to the front. That is the way it should be. If it's not like that yet, don't worry, we will make it that way. this is to match the slicer and CAD coordinate systems.

Then your endstop location is fixed either at the low end or high end of travel. That determines your M574 commands.

Then your homing directions will be positive or negative o move the head towards the endstops.

Now with all that fixed you can do the motor direction test in the corexy setup guide to determine what to do next.

davidewen

@phaedrux
Thank you for your help.
Sorry for my delayed response. I was on vacation last week.

Ender 6 physical setup
X & Y motors @ rear
X & Y stops @ max

NOTE: I had to swap X & Y at the Duet board to get the correct movement.

I have the X & Y axis moving correctly per your referenced link
https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCoreXYPrinter

X homes correctly.
Y homes correctly.

Thanks again!

David

Phaedrux

Just to double check, try printing some text to see if anything is mirrored.

davidewen

@phaedrux
I'm not to the point of printing yet. I don't even know how to load a file yet.

I'm still trying to figure out the rest of the config.

I'm currently working on the Extruder.
I installed a Bondtech extruder. So far it's working, but not loading filament all the way, so I must have some parameters incorrectly set.

So far I have the X, Y & Z axis moving in the correct directions and the endstops working.

The EZAble seems to be around 15mm off to the + side even though I have it set to +2mm.

davidewen

@phaedrux

First print completed.
I printed text to confirm no mirroring was happening.

I had 2 problems.
1: 1st layer was crushed against the build plate. I had to babystep by 2.8 mm to get filament to come out. Homing Z works everytime. I used Cura to slice.

2: print was horribly slow. It took 38m 27s to print "Duet 3 mini 5+" @ 0.6mm thickness.

I'm using mesh compensation, and it maps out the surface.

Printer is capable of moving 200mm/s.

Any suggestions for solving these 2 problems?

Phaedrux

@davidewen said in Need help with Ender-6 core xy motor movement:

1: 1st layer was crushed against the build plate. I had to babystep by 2.8 mm to get filament to come out. Homing Z works everytime.

Calibrate your probe offsets.

https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_height

@davidewen said in Need help with Ender-6 core xy motor movement:

2: print was horribly slow.

Check your cura start gcode section for any speed commands that may be there overriding your config.g settings. Also make sure you're set to use RepRap Gcode flavour.

Post a sliced gcode file here if you're unsure.

davidewen

@phaedrux

Thanks. I'll calibrate the probe offsets.

I'm not sure about the RepRap flavor.
Here's the gcode that I ran.
Duet 3 mini 5.gcode