Hi,
I am new to printing with nylon on my FF creator Pro. Though I have plenty of experience in printing with ABS and PLA, i have just started using nylon(Polyamide) filament. I have properly dried the filament in the oven and there are no traces of moisture in it. The problem is the layers are splitting during the printing as well they get easily delaminted after the print is done with the help of just my fingers.
- Bed temp: 110C
- Nozzle temp: 250
- Layer height: 0.2mm
- Speed: 40mm/s
I have tried ranges of nozzle temperature from 230-270C and bed temp from 80-110 but to no avail. I am using a PVA coated glass bed and also using a brim. There is no problem in adhesion to the bed.
Can anyone out here help me with the correct settings with the help of which i can print this filament.
I havent been using the cooling fan since using it causes cracks while printing and also warping.
I would keep the bed temp around 70 if on glass. Maybe try lowering the print speed to 25-30. Temp should be 245-250 and maybe try raising the flow rate a little bit or try 150microns. I have had the same issues you had before but generally only on 300micron layers. Is your build chamber enclosed or open? Because i find best results when i use a closed chamber.
While your printing a sample… keep lowering the speed via the LCD every few layers. Once the part is done, you will have sample with multiple speeds.
I would also recommend printing several parts at once if they are small… This helps keep the heat build up to minimum and less tuning required for smaller parts.
Honestly, I gave up on nylon in a flash forge. Its just not worth the trouble and the customer does not get the quality they expect. ABS plus or PETG will give you the strength and heat resistance your looking for.
Look at the reviews of the new fiber reinforced nylon hubs, They have warp issues as well.
Which Nylon are you using? I’ve made dozens and dozens of parts using Taulman 910 for an OpenRC Truggy RC car that I’ve built as well as some other high strength parts such as GoPro mounts and others. It is by far one of the strongest materials available and once you get it dialed in it prints reasonably well. For some background, I have an all enclosed FFCP, with the Micro swiss all metal hot ends, 0.4 nozzle, glass bed with PVA glue for good base adhesion, and using Simplify3D for my slicer. I run mostly 0.2 layer height, sometimes 0.1 for small high def parts like gears. I run my bed at 50C, nozzles at 255C, and speed at 60mm/s. You may have to go a bit slower if you don’t have the all metal hot ends. I only occasionally run the fan between 30 to 60% for small parts, areas of overhang at more than say 30 degrees, and close knit areas. Even with the fan running I get incredible layer adhesion. Having used the Taulman Bridge and 618 nylons, I’d have to say 910 is the easiest to print and the strongest. In my honest opinion, I would have to say your material may not be dry enough. Nylon really absorbs moisture well and it’s very difficult to dry it out, especially if its been exposed for some time. I’ve had similar issues to this and it all came down to moisture. I never heard any hissing or popping while extruding, but the parts would just delaminate right in my hand or when taking them off the print surface. I now keep my nylon material (and some others) in a closed bucket with a layer of silica crystals (kitty litter!) and a 60 watt bulb connected to a timer running 12 hours on, 12 hours off, every day.
I hope this helps!
Normally I’d say your Nylon is moisture laden, but your layers are pretty smooth it seems. Perhaps it’s the filament itself? Where did you purchase it from?
Dry the Nylon in a low temp oven or using a “hot box”; the Taulman website will have instructions for building one using a home depot bucket and an incandescent light bulb. Be sure to dry it for at least 12 hours if using the Taulman rig…
Keep layer height around 150-200 microns; temp around 250, 50mm/sec, no fans, chamber closed.
This is a common issue with “wet” or moisture saturated nylon as it will not fully bond if the moisture content is greater than 10% relative humidity.
