BMW Coaster - 2 x 2 - 3 filament

prusaprinters

<p>This is the PETG version of the BMW coaster by TheNthAxis printed 2 x 2, so I got 4 coasters printed together.</p><p>Filament used is Overture PETG &nbsp;on a Prusa i3 Mk3/S</p><p>Getting the settings perfect for PETG took me a while, hence sharing with the community.</p><p>The most critical setting is getting the 1st layer correct. I used a 1st Layer calibration that allowed me to find the exact Z height within .005 mm. I also printed a temp tower to find the exact extruder, bed, and fan settings to minimize curling, stringing, and avoid burning the top layer of PETG with a hot nozzle. The last change from the original PETG setting was reducing 1st layer speed to 10mm/s, which although painfully slow, gives me a perfect finish, almost glass smooth - as smooth as the PEI sheet allows - without destroying the PEI sheet or the final print.</p>