Printing PLA is so much easier than printing ABS. NEVER thought I’d say that.
Can it use material as powder metal ?!
How did PLA get such a bad rep? I use it nearly all the time.
王錦豐 - No, uses filament.
What originally scared me away was all this talk about how you need a fan to cool it after it lays down. Which in fact I haven’t needed a fan at all.
Next Food producer for space!
Do tell I have not made the change get as I have 6 spools of ABS for my FlashForge. What do you like about the switch? I find ABS pretty easy to work with.
you do get a noticeably better print if you use a fan to cool it. even just a deskfan. (though you do have to be careful not to cool the hotend)
While PLA is much easier to print something so complicated as a hot end, I learned that it will become soft when exposed to heat from a long print. I believe it is a combination of convection from the hot end, and also from the extruder motor. Eventually the extruder warped and the head became loose, because the bolt holes elongated, adversely effecting print quality. After producing the parts in ABS, I have not seen the problem return. My experience was with a Wade’s extruder on a Mendel90 with Jhead hotend.
I wish there were better, or less machine specific, fan ducts for 1) cooling the hot end thermal barrier and 2) cooling the print without cooling the nozzle, and I would try PLA more.
I still do better with ABS, but probably because that is usually what I am using. If I used PLA more I would have it setup for that 
@Paolo_Amboni , as I understand the procedure (without ever having done it, so take this with a grain of salt), if you’re going from ABS to PLA, you would heat your nozzle to about 150C, and slowly increase the temperature until you can pull the filament out by hand. This ensures that you pull out the most filament (and any crud that got melted into the filament, so this is a good cleaning technique as well) without it melting and stringing. Then, you would insert your PLA and extrude a few 10s of cm at a temperature hotter than you would normally extrude PLA, maybe up to 210C to try to get any remaining ABS flushed out, then extrude as normal.
In reverse, you use probably a PLA extraction temperature of 90-100C, and for the flush extrude your ABS colder than you would normally, maybe still that 210C point.
True but it’s brittle