Tapchanger lite
A lightweight toolchanger for Voron 2. A rewrite from Tapchanger that is easier to build and run but not as rigid. Primarily aiming to support Mini Stealthburner and other lightweight toolheads.
The cool stuff over Tapchanger:
- lightweight, the shuttle + mounting plate is only 42g, half of normal Tap weight
- self locating and tolerant to ~1mm offsets on all axis.
- zero Z travel on the hotend when docking, allowing to install wipe pads, etc
- 3x faster dock sequence with only 16mm z travel, still need to move up to the tool parking area though
- no moving parts, except the bearings
- significantly cheaper to make, no rail needed
The questionable stuff:
- less rigid than the linear rail, performing quite well so far however.
How does this work?
It's essentially an oversized linear rail, that supports only ~4 mm of travel. The steel rail is replaced by small steel plates where actual contact takes place. The bearings take place of the balls, and we can get away with only 3 per side.
In addition it's a kinematic mount, meaning that it's self aligning and there is no play even if the parts are not aligned precisely. The two middle bearings ride on socket scew heads providing a somewhat flat surface and adjustability to tension the mount.
Build guide
Check the BOM.
Print the parts.
Assembly instructions coming...
Configure Klipper.
Community
Improvement ideas - bugs, pull requests welcome. Find me on Voron Toolchangers Discord, or file bugs here.
See Tapchanger youtube channel.
Credits
- Basic models from Voron Stealthburner and Voron 0.
- Mini SB Orbiter cowling form mozartlovescats.
- Mini SB LGX lite cowling form MC.
Revision history:
V1.1 - Verified and cleaned up.
- Minor model tweaks for better fit and printability.
V1 - This should work
- Redesigned and optimized - not compatible with V0
- Significanly more rigid
- Supports both Mini and full size Stealthburner
V0 - Initial drop
- It can print and looks reasonably rigid
- ~10 Tool chnages so far
- Initial dock, that looks okay for the job