miklschmidt
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
You can't loose single steps either, you'll loose at least 4 full steps.
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
the normal _SELECT_TOOL stuff applies the offsets as well
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
If it's belt tension / skewed gantry, why is it only mucking things up when using toolshifts?
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
@Helge Keck any idea what's going on here?
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
I will link this thread internally and see if the other devs have any ideas
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
Unfortunately, since this is a first, it’ll require that someone can reproduce it to help figure out what’s going on.
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
Imo that makes it difficult to argue that the toolshift code itself is causing the issue
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
Okay good. Do you have any theory as to why noone else is seeing this issue if you can reproduce it with stock PS profiles?
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
Did you return to that position after each vaoc check?
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
Also this drift continues past the 1 hour mark
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
I assume your gantry was parked at the back the entire time?
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
The difference between 10 and 45 is illustrating (at least part of) the problem
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
I’m seeing quite a lot of drift in that test
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
I think the actual issue is not the post-processed gcode itself, but the toolshift feature which is only enabled when using post-processed gcode.I still think this is unlikely, the offset code is essentially the same. Can you reproduce it with a different slicer, eg. PrusaSlicer?
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
I would not expect that much expansion shenanigans with the panels off printing PLA though, however it's still a thing.
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
But since that last test is without heating the hotend (right?) it points to belts.
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
Another thing you can try is reversing the hotend cooling fan.
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
Indeed this is what thermal expansion looks like. This is dependent on your belt equalization, if they're not the same exact length between attachment points and tensioned equally they will drift in different ways. Y's need to match and X/DC needs to match.
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
i would also expect everyone to have the same problem.
99 replies
RRCRat Rig Community [Unofficial]
•Created by Ibot on 1/24/2025 in #fix-my-print
IDEX XY Offset drift (VC4)
That's indeed strange, however i'm not following the conclusion that it's a software related toolshift issue, if it was you should be able to reproduce it on a cold printer by simply toolshifting enough times, no printing, no movement in Z.
99 replies