MakerGear Forum

I am sure this has been discussed but I did not know what search terms to use. How do you minimize the bump that can happen when the printer starts and stops. In this case I am using Esun pla+., Layer .2mm, Temperature 205, Speed 80 mm/sec, Retract Distance 1.00.

Those happen, and they are particularly visible on circular prints.

On the Layer page, you can check "Use Random Start Points for all Perimeters" instead of "Optimize Start Point for Fastest Print Speed", which will scatter the little zits and not create a solid line of them. (Some people prefer to actually have them all line up like that, because it makes them easier to remove when they clean up the print.)

You have a couple of options to minimize them.

On the Extruder page, you can enable about 1mm Wipe nozzle. (That kind of drags the nozzle for a while without extruding, over the already extruded path, just to get rid of any drips.) Not going to eliminate them completely, but it sometimes makes them smaller.

If the filament is very runny, you can also enable a small Coast, but that tends to create a groove rather than a raised bump, and you shouldn't need it with PLA at those temps. Those are good settings.

Jules of course has this correct. Just my 2 cents though.

I find it best to set a start point so that the seam is all in one line. Then you can tweak the wipe and coast settings or the Extra Restart Distance.

You should look at the cause of the zit. If it is at the beginning of the line, i.e. from the start, then you can fix using the Extra Restart Distance.

If its at the end, you can tweak the wipe and coast.

Good read:
https://www.simplify3d.com/support/prin ... s-and-zits

3dPrintingMD wrote: You should look at the cause of the zit. If it is at the beginning of the line, i.e. from the start, then you can fix using the Extra Restart Distance.

If its at the end, you can tweak the wipe and coast.

Good read:
https://www.simplify3d.com/support/prin ... s-and-zits

Nope - totally forgot that one! Great save!

Great thank you.