I am designing and building a homemade telescope, loosely following designs from here. While a lot of their components are ingeniously designed, I wasn’t satisfied with the spider plans they provided. I decided to try my hand at designing my own spider in Fusion 360 (using their free enthusiast subscription) and 3D printing it.
The spider snugly fits in an 8″ diameter tube. There are 3 slots in the perimeter to allow rotational alignment along the axis of the tube. There are 3 additional screws in the central cylinder that tilt the diagonal mirror holder and provided height adjustment. The diagonal holder has multiple grooves to provide more surface area for the silicone to bond to. The surface the mirror mounts on is on a 45. The entire thing was printed in PLA on Mark’s SOM printer (huge thanks to Mark for helping out).
A similar design could be constructed in the machine shop with multiple operations and perhaps even some welding, but the ease of designing this in Fusion 360 along with the little setup involved in the 3D printing process made this an ideal path to choose.
Every Monday Milwaukee Makerspace will be hosting Model Monday, a night dedicated to drawing in Fusion 360. If you are unfamiliar with the program it is made but Autodesk for designing with CAD (Computer Aided Drafting) and Creating with CAM (Computer Aided Machining). The parts designed in this software can then be taken to one of our many CNC machines like our Amazing Tormach, the 4×8 router table, or our soon to be completed Plasma cutting table. Fusion 360 is a free program so the price is right and it is fully capable of helping you make just about anything.
Each week Carl Stevens walks members from drawing a part to generating a tool path so you can start making chips. Participants are encouraged to come with a part they need help drawing with or a project idea. In the last few classes the class has drawn a roller skate plate for Kayla and a Speed Wrench for Larry. Stop by Monday’s at 6pm with your laptop or use a computer at the space to get started modeling.
Join us for The Greatest Show (& Tell) on Earth at Wisconsin State Faire Park September 24th & 25th, 2016. Admission is free. A joint presentation by Milwaukee Makerspace and the Betty Brinn Children's Museum.
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