Left-hand axis CoreXY help!!

perolalars

@dc42 Hi and thanks for your input but according to this diagram https://duet3d.dozuki.com/Wiki/Test_axes_or_motors_individually the command G1 H2 Y10 F1000 should move it in -X +Y and my printer moves in +X -Y and the command G1 H2 Y-10 F1000 should move it in +X -Y and my printer moves in -X +Y .
Thats why I dont understand this! And I did reboot the firmware after every change in config and issued M564 H0 before any other command... So what am I doing wrong or dont understand?

droftarts

@perolalars I have a feeling the page I linked you to is not correct for the Y movement, as it has the same as moves in X! I think it should be that positive Y motor moves are +X and +Y, negative Y moves are -X and -Y. Sorry! In which case this version of your test should be correct:


With swapped X & Y cables & command :
             G1 H2 X10 F1000          G1 H2 X-10 F1000      G1 H2 Y10 F1000        G1 H2 Y-10

M569 P0 S1
M569 P1 S1   it moves in +X -Y        it moves in -X +Y     it moves in +X +Y      it moves in -X -Y

Ian

perolalars

@dc42 and @droftarts Now I am even more confused since dc42 is saying no swapped cables and you are saying swapped cables!?

dc42

That's right, that page is wrong (it was correct for firmware 1.18 and earlier). See https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCoreXYPrinter#Section_Testing_motor_movement.

EDIT: I've just corrected that other page.

perolalars

@dc42 Hi David So according to that page my axis moves correctly now but since I have a left-hand axis setup (yes I know I am sorry but its a lot of work making it a right-hand) and there is no solution stated if one has one " If instead it is 90 degrees clockwise, you have a left-hand axis system, which will give you mirror-image prints" what can I do to correct it? Besides rebuilding the machine that is?
And thanks Ian for your input, I feel like I have 4 toodlers in my head now...

droftarts

@perolalars sorry! You should listen to @Danal and @dc42, because I’m doing this from memory, on my phone, while looking after two toddlers! And I don’t even have a CoreXY! ~~Though I still think the page I linked is incorrect. @dc42 can you check/update it?~~ already done

Ian

Danal

@perolalars said in Left-hand axis CoreXY help!!:

@dc42 Hi David So according to that page my axis moves correctly now but since I have a left-hand axis setup (yes I know I am sorry but its a lot of work making it a right-hand) and there is no solution stated if one has one " If instead it is 90 degrees clockwise, you have a left-hand axis system, which will give you mirror-image prints" what can I do to correct it? Besides rebuilding the machine that is?
And thanks Ian for your input, I feel like I have 4 toodlers in my head now...

When you say "Left Hand"... My CoreXY, when facing the "Front", the 0,0 origin is in the right (humans right) rear. Is this the same thing you are saying?

If it is the same, I can post my config.

perolalars

@Danal No, when looking at my printer from the front I have the origin in the left top corner (like where you start reading a book, kind off!) the Y axis are pointing toward me and the x axis going to the right

Danal

Got it. Yours is a true "flip" or "mirror" of chirality; mine is a simple rotation.

It is still true that one of the 8 combinations will make everything correct in "normal" X or Y moves. So you have two paths:

Continue to try to analyze and understand and select the configuration of cables and M569s based on that analysis.

-or-

Brute force "search" for the correct movements by trying all 8 combinations (stopping when you find the right one, of course).

I've done both in my life. These days, I'm so overloaded, I've biased more toward the brute force...

perolalars

@Danal Thank you but that is what I have been doing and it moves correctly but it mirrors the prints, that is where I started...
It dont seams that anyone could tell what I can do about it, hardware or software wise, to correct it (the mirroring!).
I know I could mirror it in the slicer software but thats just a half way solution since I am trying to sell this printer and I want it to work correctly...

dc42

@perolalars said in Left-hand axis CoreXY help!!:

@dc42 Hi David So according to that page my axis moves correctly now but since I have a left-hand axis setup (yes I know I am sorry but its a lot of work making it a right-hand) and there is no solution stated if one has one " If instead it is 90 degrees clockwise, you have a left-hand axis system, which will give you mirror-image prints" what can I do to correct it? Besides rebuilding the machine that is?

Decide which axis you are going to reverse. Standard CoreXY is that looking at the front of the machine, +X is to the right and +Y is to the back.
Swap the X and Y motor connections either physically or in M584, then adjust the M569 motor directions to get X and Y moving in the right directions.
Whichever axis you reversed the direction of, reconfigure its endstop from low to high end or vice versa in M574
Whichever axis you reversed, reverse the direction of all move commands for that axis in its homing file and in homeall.g.

perolalars

Ohh, thanks David, you are a savior! I was feeling a bit helpless (very much that is!) not understand what to do...
I will try this and report back... Have a good weekend!

perolalars

This post is deleted!

perolalars

@Danal Maybe I have to ask you about your config file? I cant get my head around this (in spite of David´s good description, or maybe I am to tired) so maybe I have to rebuild the end stops to looking like yours... Is it possible for you to share your homing files also? Just as info...

Danal

Sure! This is a "Jubilee", more info here

Files:
config.g

homez.g
homey.g
homex.g
homeu.g
homeall.g
deployprobe.g
bed.g
tpre1.g
tpre0.g
tpost1.g
tpost0.g
Toffsets.g
tfree1.g
tfree0.g
retractprobe.g