Hey there. I found dozens of similar problems here but it does not fully help me with my problem. I just finished building my MPCNC Primo. I already did my first test cuts and am very satisfied with what this thing can do. Now i wanted to level some pieces of wood (and resin) which i made. For tha…

I already thought about that. But can you really shim about a mm of play ? It does not feel like a nice way.

Which one are the tension bolts ? I did not find anything on that and there are a few bolts on the core :slight_smile:

if it is play, probably not a good idea to shim it because it can still move. if it is solid and just offset, then shim it. the tension bolts are the ones that have plastic on both sides of the bearing and are behind the z tubes. When you tighten them, they will bring the other 2 bearings closer …

The thing is that the z axis itself has no play at all sitting inside the core. The core itself has play. It tilts slighthly towards the open side of the core. All the bearings are in contact with the rails. So i dont know if it is good if i tighten the clamps anymore.

Take the core all the way apart and build it again. The second time around build it looser. I have not heard about this in a while now but this used to be a common problem when everything was tightened down far too much. Read through the core instructions again while you build it. There are little …

So it is the core to the X and Y rails that has play, not the Z axis? The bolts that adjust that are the four vertical ones that are on the opposite side of the tube from the core. My system had play like that and the core was cracked and it wouldn’t tighten up. A couple of the clamps were cracke…

I will definitely do this. However, I suppose this will have to wait until after my wedding because I suppose there are some other things that need to be done for this to work out, for example, fine-tuning my printer again. I have to make some presents for the people invited. To do that, I need to s…

No nothing is cracked. And i dont want that to happen. It was a pain to put it together and it just got it running so im not very eager to crack it again. I can not really address the problem. I suppose your right … the core must have play against x and y, otherwise it would not tilt. Just to clarif…

The bolts holding the clamps also hold bearings, so they too should be tight enough, but not too tight. The tightening procedure that Ryan mentions talks about starting with the bolts loose and then tightening a little at a time to get the x and y axis square. This assumes that it doesn’t have pla…

[image] Fabian: I suppose this will have to wait until after my wedding I don’t think you have your priorities straight here. :yum: Joke aside: congratulations! :tada:

Tilted Core with MPCNC Primo

Mostly Printed CNC - MPCNC Troubleshooting

Huberer April 25, 2024, 3:46pm 22

This was my post on the problem. I did reassemble the core from scratch and it was fine then.