Nozzle collision / scrapping after pause for magnet or filament change

Ender-3 V3 Printers
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1

Have had the ender 3 v3 ke for a while now, and have great print quality and first layer etc. I don’t use glue or anything, just a PEI sheet.

I recently got into trying to incorporate magnets into things, and added a pause in a layer to drop them in based on a STL intended for this.

When I add the pause, let the print get to where it needs and it pauses, I add in the magnets and resume print, it’s like the nozzle is too low by a fraction of a mm and starts scraping the last layer real bad.

I can feel the magnets are not above the height of the print, so I don’t think the magnets are causing errors. I also have this issue when just trying to do a filament change via pause, and swapping colors.

I’ve read online of others saying they have issues with this too, and some mention it’s from stepper motors disengaging and letting z height drop a little.

Anyone have any knowledge on this or thoughts? I’ve tried to search here for pause and looking through each article / thread, but nothing really lays it out like I’m describing.

I just want to be able to pause it, add them in, let it resume and be good condition, and whatever I have to do to keep steppers engaged or whatever the right solution is, I’m all ears.

I am using Creality Print 6.2 and a stock (not rooted) Creality Ender 3 v3 KE

2

Your issue looks a bit weird ! It should be able to go back at its position….I had a KE for a few weeks and I didn’t had this issue.

I guess it’s written “PAUSE” in the pause g-code on the slicer ?

Only thing I can think of is to add a offset after it resume so that’s not really a fix…it hides the real issue

And can you check after the pause but before resuming if the height of the print is really the same as the one in the slicer ? For example if you put the pause at height 45,2mm of the model..is it really 45,2mm ?

4

It is written “PAUSE” so it’s not a slicer issue. The “PAUSE” is a macro already written in the printer so unless you modified it, it should work.

So that’s a hardware issue, I guess :thinking:
but it’s bit hard to identify it as I dont’ have much knowledge concerning the KE

Have you tried to put some grease on the Z-rods ?

5

Have you managed to figure out what was wrong, mine is doing the same