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Topic: Later shift, maybe?

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.

http://soliforum.com/i/?9v6Kjxi.jpg

Any ideas what could cause this?

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Re: Later shift, maybe?

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.

SD4 w/ RUMBA, E3D Volcano, all bearings, glass bed

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Re: Later shift, maybe?

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

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Re: Later shift, maybe?

My vote is Z binding

Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!

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Re: Later shift, maybe?

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.

SD4 w/ RUMBA, E3D Volcano, all bearings, glass bed