PG35L Micro Extruder V2 - For J-Head

by UltiBots, published

PG35L Micro Extruder V2 - For J-Head by UltiBots Aug 15, 2012
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Version 2 is an alternative of the TrinityLabs micro-extruder body. This version has integrated bearing to appose idler tension. Use of the external bearing is no longer needed. The body is stronger and has M3 nut slots that don't penetrate the entire body.

Alibre PE source files included.

MendelMax 1.5+ kits and printed parts are available for purchase at www.ultibots.com.


NOTE: http://www.thingiverse.com/thing:28503 is DEPRECIATED.

This extruder works well with AlephObjects Supa-Flat X-Carriage
The bearing holders shown are:
http://www.thingiverse.com/thing:15205, the last one on the download list.
SDP_bearing_mount_for_y_axis__on_side_with_square_ends_and_fixed_holes_by_Simon.stl file.

The V2 and V2.1 idler requires M3-40 bolts.
V2.1b and 30mm versions use M3-30 bolts.
Otherwise TrinityLabs vitamins are OK.
You will need to remove and drill out the support layers on the idler and body.

08/16/12 - v2.1 has nut trap inverted for reverse direction mounting orientation.
i.e. tighten idler from right... v2.0 tightens from left.

08/23/12 - corrected idler stl and added hole support. Added v2.1b with idler nut traps moved to allow for M3-30 bolts. Have not tested with 30mm bolts. Please comment if OK.

09/06/12 - tweeked v2.1b with a larger internal bearing cavity and M3 nut traps for the eMinebea motor. The new file is micro_extruder_body_30mm.stl Also tweeked is the idler with a wider bearing cavity.

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 Looks very similar to http://www.thingiverse.com/thing:21728http://www.thingiverse.com/thi.... In that one, I used a spring to apply tension on the idler bearing. Don't you need one on this one?

Direct Drive (Gearless) Extruder
by brnrd

brnrd - No springs are needed.  I have pushed 10+ kilos with no troubles.  Unlike yours, this design has an internal bearing that is in direct contact with the hobbed gear and opposes the idler tension.  It was designed to work with a PG35L geared motor.

Printed out perfect, everything fit and the hole suppport is fabulous. I sued V2.1b and I want to love it, but my extruder motor may have shit the bed. My only complaint is that there is no room next to the two bearings for washers, so there is a lot of friction. If you add 1.3 mm to each bearing hole you can slip in the needed bearings.

the greatest thing about this design, is that it doen't need any additional vitamens aside from one nut and bolt.

oh and if it's easy enough in your cad program, why not put M3 nut traps for the motor mount and simplify assembly.

permn00b -

I tweeked the internal bearing cavity and added M3 nut traps as requested.

The new file is named micro_extruder_body_30mm.stl.

Glad you are getting results.