Pan / Tilt kit for TowerPro SG90 9g servos

thingiverse

This is a pan and tilt rig which fits TowerPro SG90 servos. These servos cost about $2 on ebay. This thing was designed to work as the neck / head platform for a Halloween prop. The motors have plenty of muscle for a light head. I used a thin plastic Jack-o-Lantern candy bucket. We added a Raspberry Pi and a PiCam, then programmed it to do face tracking using computer vision software. You could also use an Arduino Nano ($2.50) and a PIR sensor ($3) to have a scarecrow "come to life" when someone comes near it or use an HC-05 bluetooth-to-serial converter to control it remotely from your phone or tablet. This was not designed to be compact for R/C FPV. It is intended to be a light neck mechanism. However, it may be suited to other, larger FPV applications. Post-Printing Post-printing instructions: Use a #6 screw, nut and lock washer on the tilt hinge. If the screw is too long, it can be difficult to assemble. Get a short one. Make sure you center your motors using your motor controller before assembling! The horns should be "elbow" style and need to be aligned pretty well to get everything in the right place. It's hard to know where to put the horn if the motor is not calibrated and centered. Glue the pan motor mount to the pan part. There is a small indentation in the pan part that helps seat the motor mount in the right place. I've attached photos of this joint for easy reference. As a last resort, I have also added an "assembled" model for viewing only to show how the parts go together. Screw on the horns into the right place and then glue them to the respective part. Use epoxy! I tried hot glue and it is a little soft. It allows a lot of bending and twisting in the final assembly. Epoxy is stronger and holds everything tight. Most places carry JB-weld but I think it's crap. Their 5-minute "clear" stuff takes an hour to set and it's gummy and yellow. I use Permatex Permapoxy 5-minute epoxy (clear) as shown in the picture. Get a tube of it and never go back. Mix it on a clean sheet of paper with a toothpick and then apply it carefully. DO NOT get any in the outside (front) edge of the motor mount's bottom bracket. It will prohibit proper seating of the motor. Any excess or beads should be on the outside or on the edges that have a fillet. Use the screws that come with your motor. It's designed for them and they work splendidly without glue or nuts. A final thought - I would consider modifying the tilt bracket to be 1 mm longer and insert a #6 washer between the two halves of the hinge to reduce friction. The grain of 3D prints can add some snagging and grinding, plus more surface contact than is necessary.