De-lamination is much more problematic if I print fast. I set my maximum feedrate very high to accommodate travel moves. The print speed is 12 mm a second and the jerk is set to 11. I’m looking for advice on how to speed the prints up and maintain pressure in the nozzle.
Well first of all nylon is a pain to print with! There is no getting around that fact honestly. Other thing is you want the nozzle HOT when printing nylon so it becomes liquid when printing and it will stick better to previous layers. I ran Taulman Bridge for some battery covers at 250C @30 MM/S and for good measure bumped the flow up a bit just to play it safe and it turned out fine. Also keep it in mind that nylon loves to soak up moisture. Ironically the more moisture the nylon has I hear the stronger it becomes…
Nylon has a very narrow temperature window. Too low and it does not bond, too high and it decomposes. As you print faster, the plastic spends less time in the melt zone and absorbs less heat. Print a single wall vase at different temperatures and take a pair of pliers to it. If it delaminates, turn up the heat and try again. And it definitely needs to be dried (a food dehydrator or sealed bin with Damprid for a few days) or the nylon spits steam as it prints creating tiny air pockets which weaken the part.
What worked for me was:
Small nozzle 0,25mm, warm up te Nylon filament in an oven about 30min @ 110°c.
Printing very slow and cover the printer so the heat stays inside te printing chamber.Extruder temp 260-280°c.
For adhesion on te bed i use 3Dlac and blue painters tape.
Its like printing PLA, but beware as soon as you’re filament spool cools down, the nylon will be unprintable!
Also watch out if you are using teflon parts in you’re extruder, they will be broken :-D.
Enjoy!
1 Like
ashleywebster and CWCrawlers are right .
look out for moistere and print at the right temp .
do NOT put in the oven , the nylon will deform , it is not round any more !!!
small nozzle works fine when you can print at 0.4 and 0.3 without isseu.
but that’s hard to do .
By the way , your hotend is leeking !!!
and the fumes you see on the video are VERY toxic!!!
Nylon gives toxic gas and fumes at 275c . its gives cancer when you get it in your body over your lungs ,
ventilate the room well , and fix your hotend .
when your hotend is fixed , you can run faster !!!
because the filament goes the right wayout.!!?
greets mike
ps , my englisch is a bit rusty, sorry for that .
Lol I know my hot end was leaking. I almost didn’t post this because of it. Fixed.
Thats it I think! Don’t know about preheating the spool but a smaller nozzle would raise the pressure. That makes me think I should raise the extrusion widths to accommodate my .4 mm nozzle. What extrusion width did you use for .25?
255c at 35mm/s with a .4 nozzle works well for me when running 645.
250c at 30mm/s with a .2 nozzle.
