SoliForum - 3D Printing Community — Waves and oscillations

Re: Waves and oscillations

null@example.com (DePartedPrinter) — Thu, 20 Dec 2012 01:56:32 +0000

cmetzel wrote:

JB wrote:
Now off to try all the corner lifting antidotes from other soliforum threads.
Save yourself some time. 95deg bed and hairspray is the way to go.
If you're modeling your own items, design a brim on your corners to help large items stick otherwise you can turn on a brim in slic3r.

I agree with the hairspray and bed temp.

Re: Waves and oscillations

null@example.com (cmetzel) — Wed, 19 Dec 2012 16:13:46 +0000

JB wrote:

Now off to try all the corner lifting antidotes from other soliforum threads.

Save yourself some time. 95deg bed and hairspray is the way to go.

If you're modeling your own items, design a brim on your corners to help large items stick otherwise you can turn on a brim in slic3r.

Re: Waves and oscillations

null@example.com (JB) — Wed, 19 Dec 2012 15:53:19 +0000

Thanks for the responses. The lower perimeter speed works and it inspired me to try 100 mm/s infill which worked well and cuts print time. Z axis seems fine as the walls are smooth except for near direction changes.... And for bahstrike, these waves are only cool enough to work in forward time. No sombreros.
Now off to try all the corner lifting antidotes from other soliforum threads.
Cheers,
Jon

Re: Waves and oscillations

null@example.com (bahstrike) — Tue, 18 Dec 2012 23:03:16 +0000

Is it a Mexican hat wavelet?

Re: Waves and oscillations

null@example.com (IanJohnson) — Tue, 18 Dec 2012 23:00:57 +0000

You can see a good example of it here -

The simplest thing to do is reduce the speed for outer perimeters to something like 25, and leave inner perimeters at 50 and higher yet for sparse infill. I've been finding that it doesn't take much speed to get overshoot on the S2. I figure that is a tradeoff you get for price. It can make some high quality prints, but if you want high quality and high speed, you have to pay a higher price.

Re: Waves and oscillations

null@example.com (Brad) — Tue, 18 Dec 2012 22:44:17 +0000

Is it Z axis wobble?

Waves and oscillations

null@example.com (JB) — Tue, 18 Dec 2012 22:32:19 +0000

Has anyone seen this decaying wave train before? After a sharp transition, the print head oscillates for a few mm of travel. i.e. under-damped response. Guesses on whether to attack this as a hardware or software issue first?
And does anyone have a safe speed recommendation to avoid overshoot on square corners?

I'm running 50 mm/s, .3mm layers, Repetier Host+Skeinforge, Lash control on minimally (.1mm each axis in sf, turned off in firmware), firmware current as of mid November.

Thanks,
Jon