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LynxSherpa

Caution: not thouroughly tested!

CAUTION: Rn it seems as if the wear on the gears is quite high

I have to do some additional testion concerning this but rn I would not use it

alt text

Why another Sherpa:

I was looking for a new extruder as my Orbiter started dying on me and had my eyes on the sherpa mini. Doing a bit more research, I looked at the sailfin and found a mod keep the tensioner open for easier filament swaps which led to look for mods of the sherpa mini as well in my pursuit of finding the perfect extruder. I stumbled across the Sherpa Zero and thought it looked promising, though it had 4 major drawbacks imo:

  • It was not RIDGA compatible and my RIDGA gears were already on their way, so using RIDGA was set in stone
  • Having the angle adjustment screw on the tensioning arm defeats it's whole purpose imo
  • The bridge on the front housing just doesn't really look good when printed
  • No way to add a bowden collet (well this carries over from the original sherpa mini)

That's where the LynxSherpa comes in: The angle adjustment screw now sits in the front housing, the bridge is gone, the cad is cleaned up, it is RIDGA compatible and there is a core piece ready for a bowden collet (the small one that's used on the hextrudort or orbiter). When adjusting the angle adjusment screw, make sure to leave a little play, you'd rather still have a little bit of wood grain than worn out gears.

Workings:

The general idea is the same as with the Sherpa Zero, the adjustment screw is just fixed now instead of in the tensioning arm. I would also advise to use a nylon screw to not damage the axle of the idler gear.
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File names:

There are 2 different tensioning arms like with the original sherpa mini: a long and a short one. There are also 2 version of the core: the default one (dubbed normal) and one which will accept a bowden collet (dubbed collet) For the front housing there are 4 versions: a normal one and one for extruder mounts like on the armchair xol where you can add one screw from the front (dubbed XOL). Both of those versions feature a version for a "long" angle adjustment screw (m3x8) or a short one (m3x6). There is also a file for a printed version of the m5x7x0.5 shim. The optional folder contains a Turbiter mod which fits the LynxSherpa (and the normal sherpa) on an Armchair XOL.

Credits

Sherpa Mini
Sherpa Zero

Changelog

v1-0-1

  • adjusted the size of the printed shim to be a snug fit on the axle so it doesn't slide off on it's own when disassembling the extruder
  • added a little groove in the face plate so it looks nicer
  • added printable m3 shims, I used one on the m3x20 axle of the tensioning arm (facing the core) and 2 on the idler grae axle, one on each side (totally optional)

v1-0-0

Initial release