Introduction

A standard Blackbox uses a Duet IR probe for the Z axis end-stop and mesh bed leveling. This guide will cover the use of a high precision mechanical switch in its place. The ability to use a simple switch is unique to tool-changing, as we are able to mount the switch at the lowest point of the X-carriage when a tool is not mounted.

The Honeywell switch used in this guide is available at KB3D HERE

  1. Download the STEP and STL pack HERE. Print the switch mount relevant for your build.
    • Download the STEP and STL pack HERE.

    • Print the switch mount relevant for your build.

    • Use the "standard" mount for builds using the Nema 8 stepper motor for tool locking

    • Use the "RemoteToolLock" mount for builds with the optional cable driven tool locking feature.

    • This printed part will always be close to the heated bed. As such, a suitable material should be chosen.

    • Print orientations are shown to the left.

  2. Insert (2) M2 heatset inserts into Print_ZSwitchMount. Solder a length of wires to loose switch. The Honeywell switch referenced in this guide is made for soldered connections. Typically only 2 wires (GND and NO OR GND and NC) are needed for operation. This will depend on your controller and preferences.
    • Insert (2) M2 heatset inserts into Print_ZSwitchMount.

    • Solder a length of wires to loose switch. The Honeywell switch referenced in this guide is made for soldered connections. Typically only 2 wires (GND and NO OR GND and NC) are needed for operation. This will depend on your controller and preferences.

    • Orient the switch as shown and secure using (2) M2x8mm fasteners.

  3. Use (2) M3x8 fasteners to secure the Z switch assembly to Print_XBracket. Use (2) M3x8 fasteners to secure the Z switch assembly to Print_XBracket.
    • Use (2) M3x8 fasteners to secure the Z switch assembly to Print_XBracket.

  4. The X, Y and Z offsets are important for proper calibration. Use the following values as a base-line for fine-tuning the offset of the switch to the nozzle. This offset is key to nozzle alignment via TAMV (HERE) and mesh bed leveling.
    • The X, Y and Z offsets are important for proper calibration. Use the following values as a base-line for fine-tuning the offset of the switch to the nozzle. This offset is key to nozzle alignment via TAMV (HERE) and mesh bed leveling.

    • X Offset = 13.6mm

    • Y Offset = 62.95mm

    • The Z offset will vary based on your hot end/nozzle combination.

Finish Line

Kris Brickman

Member since: 06/09/2020

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