Topics created by nz_andy

Here is a short video.
Key principle is:
1: The PTFE tube held by the shuttle wants to move away from the pressure of the fed filament when there is a blockage at the other end (i.e. there is no filament extruding)
2: When there is no blockage at the other end (i.e. filament is being extruded) pressure is released.

Use a fine capillary tube (2.5mm OD - 2mm ID) and drill out the end of the PTFE tube so that it slides easily. Using this method Filament will not get jammed when a new roll of filament is fed behind the old (as there is no way for it to get around the outside of the pushed filament)

Screenshot 2022-06-18 154211.png

@chrishamm thanks, is there a way to drop a youtube video in here or can it only be a link?

Below is a picture of a nylon 6 print, works as well as a Multi-jet fusion part, maybe better. I think FDM has a lot of future, it was on the back-foot for a while but it still has a long way to go. (plenty of good refinements coming along) our latest print heads are making a big difference.

Nylon 6.jpg

@nz_andy Beautiful machine! Why did you elect to go for external stepper drivers and what difference has it made?

Thanks for the help, much appreciated, some good options there.