Tell everyone with an issue for this to start a new thread. If you all are complaining in a youtuber’s facebook group there is no way for me to know about it.
If there is an issue moving one bearing is not the correct fix.
So far, AntiFetzen, is doing a wonderful job in testing and reporting. Should know what to do in the next day or two.
That is only one file and without the “special” clamp you lose 10-15mm of machine travel.
I had the same problem, but it was only 0.3mm or so. I somehow solved it by tightening the bolts a lot. It still feels like the core is not completely fixed though.
Well the funky part is we are dealing with 0.55mm or less since that modded part is only 0.55 different. I just don’t understand how that is making it work or not. I will know more tomorrow, the 23.5mm parts are almost done printing and I should see this for myself.
If it works for me it is 100% a printer/slicer issue and I will have to make a test for it so we can figure it out. If it does not work for me I can adjust the models but still do not understand why one works and the others do not.
We already know there is a slicer setting that makes the belts sliders work or not and they have about 0.6mm clearance…pretty close to 0.55mm so that is why I am leaning so hard to that being the issue.
Where is the belt slider settings? I want to check this myself 
again I want to reprint mine in a different color but don’t want to print with wrong settings again. I have more trouble keeping track of that kind of thing than cats.
We don’t know what it was, just that it exists.
I read somewhere that the sliders were wrong in the Prusaslicer. I had no problems with them though. So if it was a problem with the slicer it would be random.
The issue was found, the core had wrong spacing for the gantry clamps. 25mm primo core clamp issues
According to my analysis of the STL the clamps have the same offset, fitting to the core. You should update these as well.
yes everything is being updated
Ryan @vicious1 mentioned in the PRIMO-thread that the modified clamps can be used (as several has reported) to counter the offset error(New MPCNC for 2020! - Primo -). I will go for this solution, since I’m all out of the fancy pantsy PLA I bought for the occation. Has anyone here attempted to make a modified Y clamp as well? Or is it possible to use the modified clamp for the Y-spot as well?
Edit: I see from the build doc that it seems like a regular clamp can be used, but then the truck wouldn’t clear. I guess this is the reason for loosing 15mm of workspace? Would the workspace be identical if a Y-clamp repair came?
Did you use a separate Y-clamp, or did you use this one for all the four mounts? How has it worked out?
Here is a modified version of the y clamp remixed from https://www.thingiverse.com/thing:4564508
I’ve tested it on my core with the incorrect hole spacing and it can be adjusted to remove all the wobble.
Enjoy!
Perfect, thanks! I will print and assemble the coming days, I’ll let you know how it goes.
Neat, that came right on time. I just printed the first two clamps and thought about sawing that piece off.
I had some time and installed the two that had been already printed on the Y-axis. It’s incredible, no more wiggling. I thought mine were installed pretty well. Oh boy was I wrong. I can only imagine how much more precise it is going to be after toolchanges when I install the second set this evening.
I’m printing the makeshift clamps right now, and finish assembling the core tonight. Good timing, I’m excited!
Squaring took me 30 seconds for the 4mm offset that I was constantly having.
Last time I tried for over 2 hours. -_-
Shoot - I was hoping to finish the gantry tonight, but only got to the trucks and tops. Well well, more fun another night
Finished the core, everything is perfectly square. No loose bearings anywhere. What a relief! I never figured the burly out, the end stops did the job. Now it was a breeze, the frame, trucks, core and rails again. I used the modified clamps, as mentioned earlier, since I didn’t have filament for a new core.