What can be done to prevent the curling up on the overhand edges of a print?

with overhangs using support can help to hold a print down as well as up, plus it gives a little more cooling time for the print

In my case I experimented by changing flow-rate & Z-Offset, I finally got great prints when I set my flow-rate to 80% with Extrusion Multiplier at 1, my current E-Steps were 122 so I figure if I set E-steps to around 97-100 I'll be in the ballpark. As to Z-offset I set mine so I am a +50% of my Layer Height so I set my extruder at .22 mm* from bed.  50% of .3 is .15 so .22-.15 =.07  I like to press just a little more so I set my Z-Offset to -.09 to -.1 Yours may vary depending on how accurate your calibration is & how well the filament sticks to the bed. 

* For those of you who don't have feeler gauges: After many attempts I gave up on them!  Try using a straight razor take off the safety edge (do so at your own risk, but really if you cut yourself you really should take up a different hobby) and just use the flat razor body, mine measure exactly 220 mil  , they are very consistent accurate & inexpensive.

good luck!

DePartedPrinter wrote:

Add a fan to blow on the print.

Wow, this will really stop overhangs from curling up? I have the exact same problem. Please pardon my ignorance, but before I go crazy modding, can I try this out by simply leaving all doors open and pointing a cheap desk fan into the front of the printer?

It really depends on how bad your overhangs are but a desk fan should work fine. You might have a hard time keeping the bed at temp doing this and it might also cause more warping on the bottom layers.

The key is to fully cool a layer before the next layer is applied.

Add a fan to blow on the print.

Wow, this will really stop overhangs from curling up? I have the exact same problem. Please pardon my ignorance, but before I go crazy modding, can I try this out by simply leaving all doors open and pointing a cheap desk fan into the front of the printer?

What can be done to prevent the curling up on the overhand edges of a print?

Add a fan to blow on the print.

Have you tried reducing the flowrate?  Extruder hitting the print is usually caused by too much material being applied for me.

I am down to .6 for my extrusion multiplier, getting good layers, infill is lacking slightly, but I did turn up the speed to 50 on that, so that could be my fault.  I figured maybe it was the z offset or even the auto-leveling stuff moving the bed up and down?  What are you running?

It does not appear that my bed is tram either, even after multiple calibrations and such I still find the layers towards the back to be more squished than ones in the front.  I really don't want to have to level it myself but will do so if needed.