SoliForum - 3D Printing Community — ABS ripple

Re: ABS ripple

2014-02-23T16:43:16Z

I'm a relative newcomer too, but I've had some extrusion challenges with different spools of filament. After setting the E-steps correctly, I just vary the Extrusion Multiplier in Filament Settings for Slic3r.

I presently have three different-colored spools from the same supplier, and I've had to adjust the multiplier differently for each spool, and save a profile for each color. My white filament is the most troublesome for whatever reason. I don't know if the colorant has an effect on these issues.

Re: ABS ripple

2014-02-18T08:12:46Z

I can confirm that it can be the extrusion setting. I'm just posting to help others who might be seeing this thread as they diagnose. It's been driving me crazy. I had been getting beautiful prints and then all of a sudden I start getting extremely severe ripples on the first layer. It seemed to be ok on subsequent layers. I've attached a photo of prints. The lower right photo is of my corrected print using an extrusion setting of 92% instead of 100%.

So, I'm just confirming the good thread above and hope it helps someone else.

Re: ABS ripple

2013-07-07T16:35:50Z

That filament diameter is fine. It's overextrusion or improper bed leveling.

Re: ABS ripple

2013-07-07T11:21:58Z

Not an expert, but looks like what I get on first layers, where I'm intentionally overextruding (but it sorts itself out on later layers). Perhaps, in addition to adjusting diameter, run some calibration cubes and adjust extrusion multiplier for new filament? .6 sounds large, but if its between your extreme values, it happens in my case (as recommendation goes, trim extreme values from sample and average remaining diameter measurements).

Edit: also, my guess is that nozzle diameter does not matter, you should take error relative to filament diameter (you want the same length of filament to push through the same volume of plastic.. and that would vary in proportion to diameter of filament, independent of nozzle diameter)?

Edit2: If problem was due to severe filament diameter variation, I'd guess you should see issues on vertical walls too, but those look fairly reasonable as far as I can see (whereas mostly consistent over extrusion will affect dimensions, but not cause ripples on small surface areas). Hopefully one of the experts will refute/validate my guesses here. Just my 2c.

Re: ABS ripple

2013-07-07T01:18:18Z

pcm81 wrote:

nlancaster wrote:
Picture?
Picture attached. Look inside of the white lens cap. The wavy pattern is always perpendicular to path of printhead. I did not play with tension arm, because went from 1.73 to 1.73 fillament.
Any ideas?
Thanks ahead.
EDIT:
I am printing on kapton on the mirror with hairspray. The kapton is well attached to mirror, no bubble etc on capton itself. 90 C bed Temp.

After some micrometer work i found that the filament diameter varies between 1.725mm to 1.78mm. Is this too much variation for a 0.4mm print nozzle that SD3 uses? I don't know what is the acceptable variance...

Re: ABS ripple

2013-07-07T00:32:12Z

nlancaster wrote:

Picture?

Picture attached. Look inside of the white lens cap. The wavy pattern is always perpendicular to path of printhead. I did not play with tension arm, because went from 1.73 to 1.73 fillament.

Any ideas?
Thanks ahead.

EDIT:
I am printing on kapton on the mirror with hairspray. The kapton is well attached to mirror, no bubble etc on capton itself. 90 C bed Temp.

Re: ABS ripple

2013-07-06T07:30:47Z

tension arm too loose maybe...

Re: ABS ripple

2013-07-06T06:29:48Z

Picture?

ABS ripple

2013-07-05T03:13:57Z

I switched to a new ABS spool and started to notice something that looks like ripples when doing large layers. Imagine what kapton tape looks like if you get air trapped under it; that is how the ABS looks like. Direction of ripples is always perpendicular to travel of the nozzle on a given layer. I am guessing its a feeding problem? What do you think? I checked filament diameter and it matches my old one.

Thanks ahead