Direct-drive Simplified

Uploaded 1/22/2017 UPDATES:

1/24/2017 624 bearing idler id change to a more press fit, widened out the lip for the extruder flange so that it wasn't so tight to install, changed the other nut hole to 3mm also 1/24/2017 PTFE inner and outer ports implemented as well as further tweaking with size and simplicity
1/26/2017 624 bearing is now held by a flat head m4 bolt and nut. Widened the PTFE counter-bores. Widened the cold-end flange height. Removed strange flange that prevented easy idler inspection and cleaning 2/27/2017 Stiffened the 624 bearing holder, and also now does not need a flat head to fit a bolt head to hold the bearing.

With more to come!

for 1.75mm extrusion

Remixed around cheap Chinese hot end off eBay, and existing designs.

BOM BOLTS: M3 X 5 (3) M3 X 20 (4) M3 X 50 (4) M4 X 10 (1)

NUTS: M3 (5) M4 (1)

ALSO: 624 BEARING (1) PTFE FOR 1.75MM FILAMENT (ABOUT 40MM) CABLE TIES (6) Optional 40 mm fan

Changes: Standard OD for the cold end (16mm flange OD & 12mm shaft +.1mm/-0mm), with a flange height of 5mm. Idler remade for a 624 bearing. Spring tension idler is now made fore a m3 nut & bolt. Modified to hold PTFE for minimal resistance by request. Also Idler modified to use m4 flat head bolt to reduce play.

Description @ Nitrositos carriage http://www.thingiverse.com/thing:1964847 "A carriage remix. You can use flanges to hold. And use the 4 screws to anchor the extruder completely.

Un remix del carriage. Puedes usar bridas para sujetar. Y usar los 4 tornillos para anclar el extrusor completamente."

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