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First Layer Blobs
Posted: Sun Apr 28, 2013 11:59 am
by liqdfire
I designed this model in openSCAD today, but when I tried to print it I keep getting a large blob on the first layer right after it puts down the first perimeter.
The large blob does not show on the preview.
Could someone please advise.
Re: First Layer Blobs
Posted: Sun Apr 28, 2013 1:53 pm
by slipshine
Check to see if g02\g03 is turned on in your g-code config.
If it is disable it. I believe I saw somewhere that it might help.
Re: First Layer Blobs
Posted: Sun Apr 28, 2013 8:37 pm
by liqdfire
slipshine wrote:Check to see if g02\g03 is turned on in your g-code config.
If it is disable it. I believe I saw somewhere that it might help.
I checked that out, I am using the MakerGear M2 profile, it has that option selected.
Re: First Layer Blobs
Posted: Sun Apr 28, 2013 8:47 pm
by slipshine
I believe there is a bug with it.
Give it a try with it off.
Re: First Layer Blobs
Posted: Mon Apr 29, 2013 4:18 pm
by Simplify3D
slipshine is correct. If you are using Marlin firmware, you want the G2/G3 replacement option turned off. That will be the default for v1.1.2 when it comes out.
The G2/G3 commands that Creator produces are actually 100% correct, but the Marlin firmware still doesn't handle them appropriately. I'm guessing there are a lot of very slow trig calculations being performed on the microprocessor that cause the firmware to pause while it computes. This is what is responsible for the blobs and pauses that many users notice. In short, Creator is a little ways ahead of the currently available firmwares, most likely because it's one of the first programs that is able to accurately detect and account for these arc segments!
Re: First Layer Blobs
Posted: Mon Apr 29, 2013 6:26 pm
by liqdfire
Ok, I will give it another shot later tonight, and report back.