Pan-Tilt lighting head for Martian rover

thingiverse

No robot is ever complete without lights and eyes. This pan/tilt assembly is for the Martian rover (http://www.thingiverse.com/thing:1318414). Repbaza kindly provided a mounting for a standard servo, making it impolite not to use it. Two standard-size servos are required (it's designed for Futaba s3003) although mine were bought cheaply on E-Bay and are slightly larger than the official dimensions, possibly fake. Any standard servo should fit through; one with a maximum 90-degree rotation angle is desired. The holes are splined for a Futaba servo but can be changed in FreeCAD for other servos if needed. It's difficult to print the spline shaft accurately enough for a perfect fit so it's printed 0.1mm too large and uses a bit of bicycle inner tube repair rubber around the spline to make a tight fit. It has mounting holes for five standard 5mm LEDs. Three white and two red LEDs are used, and a 4-channel sequencer (http://www.ebay.co.uk/itm/231693026897) drives them via a few diodes and resistors. Printer Settings: JGAURORA A3 Rafts: Doesn't Matter Supports: No Resolution: 0.1mm Infill: 30% Notes: Printed in ABS. Most of it isn't tricky apart from the spline shafts - hence the 0.1mm resolution. How I Designed This: FreeCAD The original is included in case you want to adjust it. The upper servo has been "padded out" with a larger top to match the dimensions of mine.