Core XY movement issues

dc42

@fxxtoo said in Core XY movement issues:

@dc42
Yes I can. I posted that result here : https://forum.duet3d.com/post/55484
I had found a post that you had done about putting the M92 Xxx Yxx, with the steps set for 1/16 step rate before the M350 command. I changed that and my issue with the Y moving with the X and vice versa, Stopped. I was asked if I could replicate it. I tried and I could. I thought maybe I had something else that could effect it in my config file, so I posted it after I had changed it, leaving the original statements marked in it, obviously commented out.

Firmware Name: RepRapFirmware for Duet 2 WiFi/Ethernet
Firmware Electronics: Duet Ethernet 1.02 or later
Firmware Version: 1.21 (2018-03-21)
Web Interface Version: 1.21Firmware Name: RepRapFirmware for Duet 2 WiFi/Ethernet
Firmware Electronics: Duet Ethernet 1.02 or later
Firmware Version: 1.21 (2018-03-21)
Web Interface Version: 1.21
RJ

Thanks. I'd like to get to the bottom of this, so please can you:

Using your existing config.g, send M92 and check it reports the correct steps/mm. X and Y should be reported as 320 because the M350 command will have adjusted them.
Also send M667 and verify that the axis factors reported are all 1.0.
Change config.g to the version that gives problems. Verify that the problem still exists. Then run M92 and M667 again and check what steps/mm and axis factors are reported.
After that, try deleting and re-typing the M92 X320... line in case it contains any non-printing characters, and see if the problem is still present.

Thanks - David

FxxToo

@dc42 @ everyone
Thank You Dave!!! You made me find the problem. By going in fresh this am and starting to do the test, I discovered that in my original config.g file posted here, the original M92 statement was incorrect, it read "M92 Y320 Y320 Z1400 E420 ". I guess my mind corrected it every time I looked at it. Your #4 test was what made me catch it. So I have corrected it and all seems to be correct. I ran the test with the bad M92 statement and got this
9:43:05 AM
M92
Steps/mm: X: 349.956, Y: 320.000, Z: 1400.000, E: 420.000:420.000:420.000:420.000:420.000:420.000:420.000:420.000:420.000

I can't really comment on the inner workings, but it shows me that the two motors were not in sync. So my problem is solved and the mystery of why is now as well.
I apologize for all of the time and effort that was put in to finding my stupid mistake and thank everyone for their time and effort.

dc42

I'm glad we got to the bottom of it. The default XY steps/mm is 87.4890 (a hangover from the first printer to use a Duet), which explains how you got the 349.965 steps/mm after changing the microstepping.

JoergS5

@fxxtoo What the heck, I checked your config files multiple times to find something and overlooked it also.
Glad that you found the solution now!

FxxToo

@dc42 Amen to that!!!!

FxxToo

@joergs5
Yes.. I can't begin to tell you how many times that I looked at it and missed it.. And I wear glasses!

deckingman

@fxxtoo said in Core XY movement issues:

@joergs5
Yes.. I can't begin to tell you how many times that I looked at it and missed it.. And I wear glasses!

If it's any consolation, I too didn't spot it (and I wear glasses too).
But I'm glad you got it sorted because I was starting to doubt my own sanity.

FxxToo

@deckingman Thanks, sometimes to close to the forest to see the trees!

deckingman

@fxxtoo We should have gone to spec savers maybe

T3P3Tony

@fxxtoo
Thanks for sticking with it while we have been throwing ideas at you, as @JoergS5 says.. you now know how it all works very well!

FxxToo

@t3p3tony
Thanks for the kind words, but I have just started the learning curve.