First few layers are not consistent

I've attached two pictures. The first is ABS printed on my RatRig, the second is PLA Pro+ printed on my Prusa. I'm trying to produce the same results with ABS on my RatRig as the second picture. It seems that the first few layers end up with artifacts, any idea what causes this? I'm using the RatRig configurations in SuperSlicer with very minor modifications. My bed mesh isn't great, typically a range of 0.25mm-0.38mm, it's not all that consistent for some reason. This is a 400mm V-Core 3.1 printing on a smooth PEI sheet. The Filament has been in my Dryer for days at 75C. I am running two linear rails on the gantry with no aluminum extrusion. Any advice on what to try?
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4 Replies
TonyStyles
TonyStylesOP2y ago
I did a test with Carbon Fiber ASA, on my RatRig, same settings as the white print above.
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TonyStyles
TonyStylesOP2y ago
I'm going to chalk this up to different filaments printing differently. I'm likely going to try different nozzle temps. Definitely open to other ideas though.
TonyStyles
TonyStylesOP2y ago
Seems like it was a nozzle temp issue. I was printing at 255C. I checked the manufacturers recommended temps, then added 5C because I have a hardened nozzle, then sliced the same file for 230, 235, 240, 245, and 250. Immediately the 230C showed good results.
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TonyStyles
TonyStylesOP2y ago
Scratch that. This was at 255C. Not sure what was going on. The geometry is slightly different from the original problem. I'll test the original geometry.
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