Until now I did not have any problems printing all kinds of filaments including PLA, ABS, PETG and EasyWood. The first test with Nylon (Taulman 645) filament changed this though.
The most important thing before trying to print Nylon is to make sure your hotend can handle the heat. (printing @ 245°C) For this I upgraded to an E3D V6 all-metal hotend over a year ago.
The first problem with printing Nylon is that the high temp protection of the printers firmware is kicking in a about the temperature needed to print Nylon. In order to prevent the high temp protection to kick in too fast I changed it in the firmware from 250°C to 270°C.
After addressing this I could try to print the first part, as you can see not a great succes.
I was experiencing serious under extrusion because the filament was slipping.
In order to improve this I added 2 washer under my tension spring to increase the clamping pressure of the filament. This helped, but not enough…
Looking at the drive gear it was not the best quality piece of material, after some looking around on the internet I found a replacement highly recommended by the community.
I chose to replace my drive gear with a 1.75mm drive gear from Ultibots.
Unlike other drive gears (MK7) this design is only for 1.75mm instead of both 1.75mm and 3.00mm. As you can see the teeth are much sharper giving the gear better grip on the filament. Also the material and finish of the part are really nice, I can highly recommend this as an upgrade. (even though the shipping and handling to the Netherlands is more than the part itself.)
Next steps to this post will be added later…. (or not)