SoliForum - 3D Printing Community — Later shift, maybe?

Re: Later shift, maybe?

null@example.com (mdrVB6) — Thu, 09 Apr 2015 12:18:05 +0000

AZERATE wrote:

My vote is Z binding

I want to change my vote to this, haha. Maybe run another print that is at least this tall, like a vase or something, and see if a similar pattern happens at the same heights. Perhaps your Z rod became damaged.

Re: Later shift, maybe?

null@example.com (AZERATE) — Wed, 08 Apr 2015 21:28:29 +0000

My vote is Z binding

Re: Later shift, maybe?

null@example.com (shoag1) — Wed, 08 Apr 2015 20:31:15 +0000

It's PLA I've done bigger pieces with no problem

Re: Later shift, maybe?

null@example.com (mdrVB6) — Wed, 08 Apr 2015 20:22:23 +0000

Is this ABS? My first thought is that its a fairly large object and your print area is not being kept at a constant temperature. Do you have an enclosure? That might explain the slight splitting but I'm at a loss on the banding. But maybe run another PID autotune on your hot end to make sure that it is staying at a constant temp.

Later shift, maybe?

null@example.com (shoag1) — Wed, 08 Apr 2015 20:01:18 +0000

So I've run into a problem that arises where every 4 layers or so the outer shell layer sticks out a bit. However this only happen for layers between 30-150 and then stops and prints no problem. I did a full re-tentioning of the belts and the problem still persists, but the other thing is that it only occurs on certain models, I've printed models 8" high with no problem and yet some models have layer shift between layers 30-150. See image below.

Any ideas what could cause this?