Everything is merging together  

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Tim G
(@tim-g-2)
Eminent Member

OK, I had an issue with the print bed moving rotationally.  I tightened up the u-bolts and now that is fine, but now all

my parts are sticking together.  By this I mean things that are supposed to be separated by some tolerance are fused solid.

When I first got the printer, I printed a gear bearing and it came out greatand worked well.  Now, I try to print this same bearing using the

same settings and it is fused solid.

What could be causing this?  How can I fix it?

Posted : 20/01/2021 4:48 am
jsw
 jsw
(@jsw)
Noble Member

I would carefully inspect things, be sure the X and Y axes have tight belts, tight grub screws, and all bolts around the frame are tight.

Be sure that both axes move with no sticking or binding.

The X and Y axes should have no detectable slop or play.  You can test for this by holding the relevant motor shaft with pliers and trying to move the axis manually.

Posted : 20/01/2021 5:04 am
Peter M
(@peter-m-3)
Prominent Member

First layer to low?

Nozzle hole is bigger then it was, wen it was new.

 

Posted : 20/01/2021 11:58 am
Tim G
(@tim-g-2)
Eminent Member

It doesn't fuse on the first few layers, but by about 5 or 10 layers it's already started to fuse.  I will check the belts today.

Just curious, what would make the nozzle hole bigger?

 

Posted : 20/01/2021 3:35 pm
Tim G
(@tim-g-2)
Eminent Member

Checked the belt test and it read 266 for both X and Y.  Checked it manually and it did seem a bit sloppy, so I tightened the tension on both

axes and reran the belt test.  this time it read 278 for both.  according to the manual that should actually be looser.

anyway, after that I printed a tolerance test and things are ok down to 0.2mm.  below that things are stuck, but I can live with 0.2mm (this was printed at the 0.2mm layer height draft setting.  maybe if I went down to 0.1mm it would work at a lower tolerance.  if i have time later, I will try that.

 

Posted : 21/01/2021 3:49 am
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