E3D Tool Changer Pebble Wiper V2.1

Pebble Wiper V2.1 for Tool Changing 3D Printers

I was tired of unreliable, time and filament-wasting purge blocks which made the tool changing 3d printer experience much less convenient. The Pebble Wiper system instead extrudes a small amount of filament (a pebble) onto a small flat platform, cools this filament, and then wipes it off the platform using a servo. If any filament is leftover on the nozzle, the hotend then does a brushing routine over a soft silicone brush. The Pebble should fall into the “Pebble Bucket” which simply slides onto the bottom of the Wiper and can hold several prints worth of Pebbles.

I also created a version of the Pebble Wiper which uses a lead screw to raise and lower the platform along a linear rail. This version is available as a remix:

I recommend the height adjustable version as it can adjust to different hotend lengths and allows you to use a more reliable, however complex, wiping routing. 

I have included SLDPRT, STEP, and STL files for regular E3D Tool Changers using both fancy and cheap servos.

BOM for Pebble Wiper V2.1:
Printed PW V2.1 (I recommend printing in Polycarbonate, but other materials may work just as well, depending on your use case)
Servo (I recommend the KST DS215MG, a servo lead extension may be required)
Silicone Brush
Adhesive Backed Metallic Strip
*Optional: Metal Servo Arm

Links to model sources and materials used:

René's "Automatic Adjustable Brush": https://rene-jurack.de/automatic-adjustable-brush/
Gregs's “Adjustable Cleaning Brush”: https://www.thingiverse.com/thing:3744969

Servos:
- https://tinyurl.com/DS215MG
- https://tinyurl.com/MG14Servo

Silicone Brush:
- https://tinyurl.com/Silicone-Brushes

For the metallic strip any adhesive-backed metallic foil should work, such as HVAC foil tape.

Please check out my GitHub page for other information if needed: https://github.com/KevinMar1/Pebble_Wiper/releases/tag/V2.1

If you have any further questions, feel free to message me on my Instagram account @kevins_prints, or email me at Kevin.Mardirossian@gmail.com