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Dotted Sheet  

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gkas
 gkas
(@gkas)
Estimable Member
Dotted Sheet

Since my MK3S was fairly new, March 2020, I've been printing with a 0.4 Tungsten Carbide nozzle. It's been great, and I've printed with stock profiles.

Today I decided to test out a 0.6 E3D V6 nozzle. There are time I'd sacrifice some quality for speed. I swapped in the 0.6 brass nozzle, calibrated Z, and and calibrated my first layer on a smooth sheet. When it calibrated Z and I start a print, everywhere the nozzle touches the sheet, I get a small dot of filament. I recalibrated Z and redid my first layer. I'm stumped, because I've never seen this before, but I am a neophyte at nozzle changes.

Zip file of 3mf

calicat_06_40

Posted : 25/01/2023 5:20 am
gkas
 gkas
(@gkas)
Estimable Member
Topic starter answered:
RE: Dotted Sheet

I just started another run. I lowered the filament temp by 10 to 205. No dots and the first layer seem to be going down nicely.

Posted : 25/01/2023 5:47 am
Neophyl
(@neophyl)
Famed Member
RE: Dotted Sheet

This is why many people modify their start gcode to preheat to around 160-170 during mesh levelling and only after it has finished increase the temp to full printing values. Known as the Bobstro or a no ooze start and was adopted for the mini start sequence when it was released. 

Posted : 25/01/2023 5:53 am
fuchsr
(@fuchsr)
Famed Member
RE: Dotted Sheet

Nothing unusual here. Glad you found the solution yourself. Best thing to do is to adjust the startup gcode as Neophyl mentioned. And get a 0.6 mm TC nozzle! I have them from 0.25 through 0.8mm. 🙂

Posted : 25/01/2023 1:44 pm
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