Feedback/integration request for Mellow/Annex Engineering Sherpa Micro extruder

[nexus665]

Hi,

I recently changed my Voron toolhead from SB to Xol and am pretty happy with it in comparison. I got the Sherpa Micro extruder, as the article description stated it had the same mounting pattern as the Mini - should have double-checked :) Of course, it doesn't. It also does not feature the extended front plate that has a fastener below the interface plane with the mount.

Github Link to the Extruder
CNC Version I got (german shop)

CNC/printed versions are identical, but the mounting pattern is a bit narrower than the Mini. Also, the pancake stepper interferes with the mount of the Mini, so there was no simple fix and I could not just move the mounting holes.

So I took the mini mount and modified it to fit on a CNC Tap V2 (fits V1 too), along with a mount plate for an EBB36 board that is way more stable than others I've found - because it uses 3 mounting points instead of 2. The mounting pattern for the stepper does not interfere with the EBB board at all, unlike all versions I found online so far - which use the stepper mounting bolts exclusively. Mine uses the TAP mounting holes instead. Nice extra benefit of this: shorting out your toolhead board on a fastener becomes almost impossible. As for how I know that can happen on other EBB mount plates...smh...well, at least I had a nice dummy PCB to test with ^^

This is a not perfectly cleaned up version, I'd like your feedback on it before I put in more work to clean up the last few small artifacts from plugging a top section onto the existing Sherpa Mini mount. Oh, and shave off the extra bit on the left that's not supporting anything on the Micro.

I used two M3 heatserts on top to fix the extruder to the mount - the hole pattern interferes with the Tap mounting screws and makes a through-plate mount option pretty difficult. Do you think that's acceptable?

It is to me, because I designed the EBB mount to also brace the extruder. It is VERY stiff as is, my resonant freqs moved up a couple of Hz vs. my old mount (from the project you link to in the docs for 3rd party EBB mounts). Also, it has been working quite nicely in my Voron for a week now, so I'm happy with that.

STL:
CNC-Sherpa-Micro-Extruder-Mount.zip

(obviously, CAD is available if interested)