Custom telescope mount using harmonic drives and ESP32

73 waerhert 8 8/19/2025, 9:46:27 AM svendewaerhert.com ↗

Comments (8)

fusslo · 23m ago
I've been using freeCAD for about 3 years now. Looking at what he was able to make with it blows my mind. I love freeCAD, but I don't think I've ever been so continuously frustrated by a piece of software
Klaster_1 · 6m ago
For real, I've been using FreeCAD for small hobby stuff for 7 years and still often find extremely frustrating UX issues in features new to me, stuff that wouldn't pass QA (I'm a FE dev and know a thing or two about that). When I proceeded to understand why overconstraints are an error and not a warning, I immediately discovered a multiple page thread on FreeCAD forums with regulars gaslighting how everything was exactly as needed because "performance", despite this being a deliberate choice, not a solver limitation. This gatekeeping attitude is really off-putting, the project needs a UX expert and a good community manager to root out that power user crap.
imtringued · 8m ago
Three years should be more than enough time to have learned how to perform a few simple extrusions and pockets. What we're looking at here is essentially a pipe with a cap.

Free cad gets really complicated the moment you want to do surface modeling.

Aaargh20318 · 10m ago
Cool project. Strain wave mounts are fantastic. Just ordered a wave 150i myself. Can’t wait to not having to waste time balancing my scope anymore.
ddahlen · 53m ago
This is really impressive! I considered buying a big harmonic drive mount for my scope, but the cost is really prohibitive.

I have experienced the pain of getting ekos/kstars/indi tools to work well on my personal scope. If you want to try driving indi devices via python I have some python code (it's not super polished, but it does enough for my needs): https://github.com/dahlend/contindi

mrgaro · 48m ago
I'm most impressed with being able to order the CNC'ed metal parts. I'm just a novice cad designer and I'd love to learn that capability.
4gotunameagain · 17m ago
It's super easy actually ! 1) Upload step file, 2) see what's possible:

https://jlccnc.com/cnc-machining-quote

ryanong · 56m ago
This post reminds me of the beauty of open source. Well done build and a great project summary!