Tapchanger

A nozzle Z probe + toolchanger for Voron 2.

Features

Off the shelf voron parts, except for bearings.
Uses Dragon Burner toolhead - can fit 6 hotends in 350 frame. Stealthburner and MiniStealthburner are an option but limited support. (Experimental version of the Rapid Burner is in the works by @Marshalldog) (Experimental version for the Xol-Toolhead is in the works)
Uses OptoTap probe sensor for nozzle Z probing.
Same rigidity and probe accuracy as Tap.
Same external printer dimensions, except for top hat.
No servos, no wires on the shuttle, recommended to use with a Canbus toolhead board for less wires, but anything goes.

Shuttle Printer

Build guide

I would recommend to get a single hotend working first:

Check the BOM.
Print the parts.
Assemble it.

Multiple tools setup:

Install Umbilical.
Install Docks
Add a TopHat
Configure Klipper
Calibrate the offsets. I'm using this

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.
Dragon Burner from chirpy2605.
HGX gears extruder derived from nhchiu's ProtoXtruder

How does this work?

It's essentially an oversized linear rail, that supports only ~4 mm of travel. The steel rail is replaced by bearings riding on rods.

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.

Preview Shuttle

Revision history:

V4.3

Dragon burner printability, ease of assembly tweaks:

Two piece mount plate with less supports needed
Better access to the heatset inserts
Slightly larger sensor screw holes to better work with polycarbonate
Will need to reprint the cowling as well, slight changes there

V4.2

Small tweaks across the board:

Dragon toolhead mount plate 1mm thicker - no interferance with fans and 8mm tensioning screws do not stick out
Fix shuttle mounting plate misalignment, thanks vikwin for spotting
Alternative version for the PFTE tube holder at the side
Dock for RapidBurner
Extras
- Better ventilated EBB36 shield
- Improved strain relief for HGX + DragonBurner
- More Stepper gear distance adjustability for HGX + DragonBurner.

Dragon burner toolhead exploded view:

Exploded

V4.1

HGX gears + Dragon + EBB36 optimized toolhead:

17 mm shorter filament path
17 grams lighter than stock, only 2 screws
Integrated harness strain relief
Integrated EBB36 mount & shield
Bambu & Revo adapters only for now
There will be some supports to remove.

HGX gears toolhead

V4.0

Liftbar dock

Liftbar

Other minor DragonBurner changes:

More clearance around the hookon slot.
More room around the cooling fans, to avoid cracking the cowling when tightening the bottom screws.
More sturdy dock.

V3.2

Introduces support for the Experimental Rapid Burner Toolhead by @Marshalldog.

V3.1

End of year update, lots of small printability, clearance, etc updates. This is a stable version.

Migrated to Dragon V8 hotend.
More clearance around the OptoTap sensor.
Tuning of the tension screw angles to minimize the docking resistance.
More clearance for big block hotends.
Hook-on dock is now the recommended for DragonBurner.

V3.0

Further improvements to DragonBurner toolhead and dock. The screw head locking mechanism is back. Configuration updated, with better dock pathing.

The Dragon Burner toolhead is now the default. Let me know if you would like to see backports.

V2.9

Improved DragonBurner toolhead and dock, adding bottom mounting screws for better stability. Needs the modified cowling now.

V2.8

Added Tophat and Ubmilical, it's now a Printer!

Printer

V2.5

Added top mounted dock. see updated Dock folder.
Slight tweaks square rods mounting plate for easier fit.

Preview

V2.3 - Nozzle pads upgraded to springsteel ones, no more melting.

Pads

V2.2 - Square rods version added.

Option to use square rods for better contact surface for the bearings. Shares the shuttle and bearings with rods.

There are now total of 3 versions:

Plates - bigger bearings, more work to make the plates and assemble. The rolling surface is not great. Very rigid.
Rods - smaller bearings, easiest to assemble, but more flex.
Square rods - middle ground between plates and rods, the rigidity testing was done with this.

Versions

V2.1 - Rods fixes.

Various fixes to refine the rods version. Ready for general testing.

V2 - Rods version added.

A new experimental version using 3mm rods. See -rods files. Shuttle and mount plates changed, the rest is same.