The Pillory - AMS + External Rear Bridge Feeder 2

This creation is the development of my previous design A1-Mini-RearMountAMS+External-Rear-Bridge-Feeder. In which due to my unsatisfaction of the filament flow process performance. Don't get me wrong the inspiration is good but it is not flawless. Most of the the filament get stuck in between the PC4-M6 pneumatic connectors, which I believed the gap between the 2 pneumatic connectors cause the filament to bump particularly if the filament is not straight enough. This is most likely the root cause in most coupling solutions that uses a dual pneumatic connectors.

In this design I have used instead a PTFE Tube Coupler, a straight through Pneumatic fitting  which is installed in the bridge for the AMS lite and the external spool for manual feeding.  So far I have tested the PTFE Tube Coupler as stand alone and the filament flow  is consistent  and every pass through is say 99% flawless though sometimes if the filament is not straight enough and if encounter a bump the AMS is strong enough to push through and no manual intervention is required to push the filament. Since the the coupler requires to be bracketed I design a pillory like to hold  PTFE Tube Coupler the in place.

Additionally parts  used in this design are 4 pieces of PTFE Tube Coupler and 2 pieces of  PC4-M6  pneumatic connectors. 

Also you need an 2 pieces of M3 machine screw and 2 pieces of M3x3x4.2mm heat-inserts

I dubbed this design “the pillory” due to its likeness to the punishment tool in the medieval period.

Printed in Bambu Lab PETG-HF filament with the settings below with AMS

Nozzle = 0.4mm
Layer height = 0.20mm Standard

Wall generator = Arachne
Wall loops = 3
Sparse infill density = 20%
Sparse infill pattern = Gyroid

Support = enable

Infill gap = 100%