Servo-deployed Nozzle Wiper for 3030mm Extrusion -*UPDATE*

thingiverse

This is a servo-deployed nozzle wiping system engineered to mount on 3030 Aluminum Extrusion, designed specifically for the Hypercube Evolution that I built. I developed this to utilize the Precision Piezo Orion sensor, which is absolutely exceptional, but requires a relatively clean nozzle. This enables me to automate the cleaning of the nozzle at the start of the probing cycle. I updated and finalized this design on 4/15/19 - the revised design incorporates a bearing above the servo to provide a stiffer and more reliable nozzle wipe. Additionally, you no longer need to remove the bottom of the servo to install it into the mount. It seems to work very well, so I've removed the "Work in Progress" tag. I use this system with a hardened steel E3D nozzle, so I have no concerns using a brass brush as the wiping material. If you're using a standard brass nozzle, you might want to consider using a nylon brush (or a piece of silicone) to avoid wear. To build this system, you'll need to buy the following items: * 3x M3x10mm screws (2 to mount the servo to the mount, 1 to secure the arm to the servo) * 1x M3x20mm to clamp the servo at the front of the mount * 2x M3x6mm screws (to clamp the brass brush in place. Any screw length will work here, but M3x6mm just looks nicer) * 5x square M3 nuts (https://www.amazon.com/100pcs-Stainless-Steel-Square-Nuts/dp/B018JPZNS6/ref=sr_1_3?ie=UTF8&qid=1517527748&sr=8-3&keywords=square+m3+nut) * MG995 Servo: (https://www.amazon.com/gp/product/B01N4QD32E/ref=oh_aui_detailpage_o01_s02?ie=UTF8&psc=1) You'll also need: * 1x 608 bearing * Brass Brush (https://www.amazon.com/gp/product/B06XWFM1HJ/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1) * A small piece of 0.008" shim stock to act as a "wiper" to help catch large pieces before they hit the brush. I used a small piece of 0.008" shim stock on one side of the brush to act as a wiper to help catch large pieces before they hit the brush. We'll see how well this works in practice once I get the machine up and running.