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layer shifting issues

I've got my 2s setup as a single extruder for now.

I've had one successful calibration cube print, but when trying to print the benchy. I'm have issues with layer shifting. at first, I thought it was the belts were not tight enough, tightening them seemed to help, but I'm still experiencing layer shifting.

I think there are two issues, the first is getting the correct tension on the belts. and two, getting the correct motor driver voltage setting.

anyone have any pointers?

13 comments

13 Comments

Makertech 3D

Apr 14, 2019

We've released raised versions of the fan shrouds here for those having issues.

Bill Harmon

Apr 12, 2019

I took the fan shrouds off, before writing the post. It looked like one of the shrouds, left I think, was sitting low.

Ive thought about the tape as well as adding additional magnets.

do you happen to have a link or description for the rubber? I’m currently living in Germany, so I’ll have to use amazon.de

thanks for the hints.

Ryan Andrews

Apr 22, 2019

Replying to

@fg I was having a similar issue. I may have resolved the issue on Friday, but haven't had time to do a lot of testing yet. I had to go through and make sure that my eccentric nuts were both pushing the top wheels down roughly the same amount. If one of the eccentric nuts is rotated further than the other, it may cause the other wheel to not grip as well. I then also loosened the rubber belt on the gantry slightly. When I get home I'm going to be doing more testing. I also have an issue where the center of whatever I print, is offset towards the back of the plate in the Y direction (away from the touch screen). Not sure if this might also be causing issues.

Apr 22, 2019

Replying to

@Ryan Andrews Too much tension of the belt... mhhhh... I thought it was too loose.

Ryan Andrews

Apr 22, 2019

Replying to

@fg I don't want to speak too soon, but I think all of my issues have been solved. Let me know if you're still having issues.

Kristian Widén

Apr 11, 2019

I had issues with one of the fanducts extruding slightly below the extruder at first at one corner. This led to my first prints getting shifts, first model came loose, second model shifted the flexible plate.

U used a hobby-knife to modify the slots slightly where the duct is attached to the fan and the problem dissapeared. It was just 0.2 mm or something like that, but that was enough for it to catch the model and shift the plate. So make sure you don't have the same issue.

Ryan Andrews

Apr 09, 2019

I added some tape to mine and it fixed the issue mostly. I believe mine is still sliding after the very first layer is placed though. I bought a thin rubber sheets on Amazon that I'm going to try placing under my flex plate to see if that has better results. I will update you tomorrow, if you like.

Ryan Andrews

Apr 11, 2019

Replying to

So, adding a thin rubber sheet underneath my flex plate did indeed prevent it from sliding around. The heated bed still works too (although, I don't think the flex plate get's quite as warm as the rubber blocks some of the heat).

Bill Harmon

Apr 06, 2019

ok, it seems like issue might be that the flexible bed is sliding on. I'm printing a simple parts tray, and the build plate slid about an inch (~2.5CM). The print is continuing, but the bottom might look odd. I thought I saw something about taping the build plate to the bed, so I'll look into that.