Pickleball Machine

This pickleball machine can hurl balls at you at upwards of 60 MPH! It features adjustable speed, top/back spin and feed rate, a 100 ball hopper and a remote control. Weighing in at only about 7 lbs (without the battery), you can mount it to a standard tripod, or you can print the mini-tripod shown. It runs for several hours on a 9ah, 12v battery. And for all those loose balls, try my Ball Scoop: https://www.thingiverse.com/thing:3813749 Watch it go at: https://youtu.be/mo0VZ6vfwUY UPDATE: I've posted STEP format CAD files for an updated version of this thing that uses direct-drive DC motors rather than the belt drive system used here. **Part List:** 2x 8mm rod x 2.625", v-groove in end for retaining ring (wheel axle) 2x 8mm retaining ring (wheel axle) 2x 8mm x 0.020" thick shim washers 1x 8mm rod x 1" (roto axle) 3x 608 ball bearing 3x 8-32 x 0.375" screw (rod set screw, shield) 6x 8-32 x 1.125" screw (arm plate) 4x M3 x 6mm screw (RS550 motor) 2x RS550 motor (flywheels) 1x Maxon 2140-937-58.236-050 motor (rotor) 12x 8-32 x 1.5" (wheels) 12x 8-32 nylock nuts 4x 8-32 x 0.75" screw (coupler) 3x 10-32 x 0.75 FH screw (hopper plate) 8x 8-32 x 0.75" FH screw (hopper plate, tripod plate) 4x 10-32 x 0.75" screw (tripod plate) 8x 4-40 x 0.375" screw (hopper motor, controller cover) 3x 0.75" x 14" aluminum tube 1x 0.75" x 7.688" aluminum tube 1x 10-32 x 8" threaded rod 2x 10-32 coupler nuts 1x 1/4-20 x 3.5 bolt (tripod lock) 1x 1/4-20 nut 2x 120MXL025 belt (150t) 4mm corrugated sign board (approx 6 sq ft) Hopper plate Tripod plate 3/4" thick EVA foam (2lb/ft^3 density) Gaffer's tape **Wheel Assembly** The wheels are 6" dia. discs cut from lightweight EVA foam. (I used a Fiskar's kneeling pad from Home Depot.) Use a hole saw to cut out a 1" diameter center hole, and then rough cut with a knife, jig saw or bandsaw an oversized 6" diameter. Press the disc over the pulley90_back piece and use the hole pattern in the back piece to drill out the six holes in the perimeter of the