bray.christopher
Posts: 62
Joined: Fri Jun 19, 2015 11:24 pm

Stratification

Sat Aug 22, 2015 6:31 pm

Image

Image

Any idea what is causing this "stratification"? The spacing seems somewhat regular.

It was printed vertical and it was the only thing being printed.

Ultimaker2.

JoeJ
Posts: 1436
Joined: Sun Feb 16, 2014 10:52 am

Re: Stratification

Sun Aug 23, 2015 10:54 am

Maybe it's filament inconsistency. If the filament diameter isn't very tightly controlled, the variations can cause extra extrusion.

I've also had a printer where the vibrations caused similar layers like in your picture.

KC_703
Posts: 238
Joined: Tue Aug 26, 2014 5:23 pm

Re: Stratification

Mon Aug 24, 2015 4:32 pm

The only thing I can think of is possibly the solid diaphragm infill setting under the "Infill" tab.

bray.christopher
Posts: 62
Joined: Fri Jun 19, 2015 11:24 pm

Re: Stratification

Mon Aug 24, 2015 5:04 pm

KC_703 wrote:The only thing I can think of is possibly the solid diaphragm infill setting under the "Infill" tab.
I wish! That would make sense. Unfortunately that was not turned on. Thanks anyway.

User avatar
dkightley
Posts: 2019
Joined: Tue Mar 10, 2015 4:09 pm

Re: Stratification

Mon Aug 24, 2015 5:56 pm

JoeJ wrote:I've also had a printer where the vibrations caused similar layers like in your picture.
I've had similar where a tall thin part was unstable, so I added pinpoint joined "rocket fins" to steady it:
Capture.JPG
The fins were twice filament thickness thick and the scarring from the joiners was minimal.
Doug Kightley
Volunteer at the National Tramway Museum http://www.tramway.co.uk
Railway modeller and webmaster at http://www.talkingtgauge.net

66tbird
Posts: 33
Joined: Sat Sep 06, 2014 1:22 pm

Re: Stratification

Tue Aug 25, 2015 12:23 pm

My option is also filament inconsistency. Bigger the piece the narrower the distance between the lines is what convinced me. One day out of total frustration I loaded the cheapest filament I had that I bought on a whim because it was $10/lb. (HobbyKing brand) and ran the job. The vertical wall was flawless.

A roller dial indicator with pcm output for 'on the fly' adjustment has crossed my mind.

turbocharged110
Posts: 9
Joined: Sat Dec 27, 2014 11:45 pm

Re: Stratification

Tue Aug 25, 2015 1:06 pm

Have you tried the same part with different layer heights? Could be a rounding error where your microsteps don't match the desired Z-height, so every X layers will be lower than the others with the same material extruded.
Printer: Rostock Max w/ E3D V5 hotend and lots of upgrades/modifications

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