TapChanger - a toolchanger for Voron 2

A toolchanger system For Voron 2 based on the Tap bed probe.

This is independant effort, not affiliated with the Voron team. Use at your own risk.

Features

• Drop in compatibe with Stealthburner hotends.
• Adaptable from Tap with mostly just printed parts.
• Same rigidity and probe accuracy as regular Tap.
• Mostly staying within the same external printer dimensions.
• No servos, no wires on the shuttle, recommended to use with a Canbus toolhead board for less wires, but anything goes.
• Uses the Tap sensor to verify successful dropoffs and pickups.

See Youtube for some action.

Design

Toolheads are docked in an extra extrusion at the front of the printer. The toolhead is rested on a dock and as the shuttle moves down toolhead slides off the Tap rail.

Cudos for inspiration to WP-Daksh and the Voron India discord.

The Tap probe is almost working as a toolchanger out of the box, the main issue is that a naked linear carriage is prone to loosing balls. This is solved by pushing in a supporting TPU plug while the shuttle is traveling between the tools.

In a normal Tap setup, the plug would need to come from above the rail and no room for it there. So the MGN9 rail is flipped around - the carriage is on the shuttle side and the rail is on the toolhead side, allowing the plug to sit below the Tap rail in the dock.

Work site here

This is early build, reliability is still unclear, significant changes likely.

Done:

• The main shuttle + Stealthburner mount
• The dock works
• Put on a printer
• Make the distribution board
• Make the first print
• Iron out klipper setup.

WIP:

• More instructions
• Mini stelthburner version
• Test, fix, repeat

Known issues

• The toolhead has tendency to lean away from the shuttle when picking up, causing failed pickups if alignment is flaky, a revised dock is being considered.

Changelog

V0.2: Tools are changin.

• First successful print with ~50 changes.
• Completely new dock, the rest slightly reworked.
• Initial klipper setup. Tool auto-detection. Tap Z probe works across tools.

V0.1: It fits together.

• Basic hardware assembly and operation works.
• Real printing - still to be tested.