V4 .5mm and .75 mm nozzles

[jimc]

All these setting also depend on print speed. You wont have trouble keeping the hot end up to temp but you will end up just stripping out the filament because the petg only melts so fast. Think of it this way....there is a max speed for each nozzle dia that the extruder will be able to push the filament out before the nozzle pressure get so high that the drive gear just slips on the filament or you get clicking from the extruder where the stepper is slipping. On e you reach that max feed rate then thats it. You cant print any faster. You can do higher layer heights and wider widths but then you need to print slower. You can turn your print speed up but then you need to narrow your width and do a lower height....you get the idea. I have found that with a .5 i dont like to go over .35 height and .7 width at 3600mm/min

[ednisley]

because the petg only melts so fast

Figuring the extrusion rate gives you a quick sanity check on your settings: multiply layer height (thickness) x thread width x printing speed (in mm/s) and you should get a number close to 10 mm³/s.

For your upper limit: 0.35 mm x 0.70 mm x 60 mm/s = 14.7 mm³/s

For my PETG setup: 0.25 mm x 0.40 mm x 50 mm/s = 7.5 mm³/s

There's headroom around 10 mm³/s, but settings that call for the extruder to run at 1 mm³/s or 50 mm³/s will probably involve heartache & confusion.

Somebody (jdacal?) ran a Volcano hot end with a 0.80 mm nozzle at 0.6 mm x 1.0 mm x 60 mm/s = 36 mm³/s to get terrible results. IIRC, you run a Volcano less aggressively with reasonable quality, so I betcha it's somewhere around 20 mm³/s...

[jcspball13]

Appreciate all the tips; I should be getting my .5mm by the end of the week; I will experiment and let you guys know the result!