[Adhesion problems when printing with Taulman Nylon 680]

On 11/14/2016 at 6:09 PM, knightcase said:

I am working on a project which requires printing with food safe Nylon. I am using Taulman Nylon 680. I have a Ultimaker 2 + Extended printer. I have tried multiple configurations and have found that my best prints results from using .2 mm layer, nozzle temp of 252 C, retraction disabled, print speeds of 40 to 50 mm/s and no fan. For the small parts, they are printing fine and I have had limited success on larger parts at partial fills (normally 20 to 40 %) My problem is occurs on large parts (i.e. a 75 mm diameter disc 8 mm thick) when using 100% fill and I can't find a configuration that keeps the Nylon adhering to the print bed. I have tried print bed temps from 65 C to 80 C. I have tried Kapton tape, glue and Kapton tape and glue combined but none of this is working. I’ve seen some posts on the internet recommending anything from sanding the build plate to using a piece of Poplar wood instead of the normal build plate but before I do anything else, I thought I would reach out to this forum to see if anyone has advise/recommendations. Any direction/support anyone can offer me on this issue would be greatly appreciated.

Hello, I am having some troubles in printing with nylon 680. It seems as the filament doen't have time to cool down, but just in the bottom part of my piece (it's a small cylinder with a flange to the bottom). Could you please suggest me which parameter should I fix? Thanks!!