jeffmorris wrote: ↑
Thu Oct 08, 2020 3:47 pm
I have been using eSun PLA+ filament for a while and I like it because it's stronger than other filaments BUT it's very hard to remove rafts and supports from 3D-printed stuff. For me, the extruder temperature is set to 220 degrees C, the heated bed temperature is set to 0 degrees C, and fan speed is 50% after second layer. How can I change the settings in "FFF Settings" window to make it easier to remove rafts and supports from 3D-printed stuff?
I have a few suggestions.
If you are printing on glass, you need to heat the bed. 60C is fine. Use the Aquanet Ultra Super unscented on the glass, or you may have problems getting the print off of it. If you are not going to heat the bed, cover it with blue painters tape and your PLA will stick great.
Only if you have your bed leveled. If you level the bed, you don't need a raft. It seems to me that a raft is a horrible band-aid for a printer. Sucks up huge amounts of time and filament that you just throw away. Leveling the bed will correct almost every first layer adhesion problem there is.
Now, after you have leveled your bed, and ditched the raft, try these suggestions:
Set your first layer to 150% of your layer (.3mm if you are using .2mm layers)
Set your first layer to a higher temperature than that rest, I typically go 10C higher.
Increase your first layer line width to 110%
Doug Knightly set me on the right way for using and loving supports, the following comes from things I read and my experiences from experimenting with S3D.
Go to the support tab. I assume you use a raft to make supports more reliable, there are better ways.
I set my supports pattern to be -45,0,45,45,45 and 15% density. If I have supports on many small islands, I will go up to 25% density.
If you do have several smaller support islands, then use a brim to anchor them to the bed.
Now, after all that, the next few suggestions can help you get the supports off of the model easier.
In general, I prefer to use supports as only-from-bed rather than normal if at all possible, I hate getting supports out of a model.
Set your upper support separation layers to 2 and the lower support separation at 0 if you are on the bed, 1 if you are using "normal" supports. Depending upon the filament (harder PLA comes off easier) you can set the upper to 1 as well.
If you find that you don't get supports auto-generated where you want them, decrease their size or use the manual support button and put them where you want them.
Robotics and sensors engineer
And lots of other stuff for fun.