Ender 3 old series (v1 and V2) and Neo series Z sync belt tensioner

prusaprinters

An easy to print Z sync belt tensioner designed to work in conjunction with the original spool holder or as standalone. The parts are easy to print and they do not require supports. Hardware needed for this model is:  - M4x30 cap head/button head screws  - 3 pieces  - M4 knurled flat washer  - one piece  - Either a GT2 idler or a pair of 4 mm ID flanged bearings  - For the GT2 idler which has a diameter of 5 mm, a small section of aluminum or brass pipe with the outer diameter of 5mm and inner diameter of 4 mm is needed  - cut to a length of about 12 mm (needed to prevent crushing the bearings of the GT2 idler)  - M3 penny washer  - one piece  - M4 thumb nut - one piece   - M4 T-nuts or slot nuts ( strongly recommend slot nuts as they are far superior)The files are to be printed in the specified orientation with 100% infill (two risers are to be printed). They can be printed from either PLA, PETG or ABS.