Modular Phone Holder and Arm

thingiverse

This is a modular girder system to put an extendable, adjustable phone holder arm onto your table. You can build 1-3 (haven't tested more, but three is already flexing much) sections of girders to assemble a joints system. Highly suggested to use *PETG* for everything except base table plate - PETG is more resistant to bending and isn't slippery (especially important for joints), and ABS is slippery and helps making the rotating table plate part easier to turn. Instructions for 3 sections long arm: * using **ABS**, print all three `rotating table plate - *.stl` parts * 60% infill (can do less, but this is what holds everything in place when arm is fully extended and you put a big phone in it!) * using **PETG**, print the swing joints @ 100% infill (these receive lots of load, especially when you want to torque them down to stop slippage - you want them full of material) * 4 x `swing joint - female side.stl` * 3 x `adapter.stl` - this is what you put the hex nuts in, bolt to the girder, and then you can bolt the male joint on it * 3 x `swing joint - male side.stl` * 1 x `phone holder - bottom.stl` - PETG is important here because the parts that press against phone will bend, you don't want them crack * 1 x `phone holder - top.stl` - PETG is important here because the parts that press against phone will bend, you don't want them crack * using **ABS, PLA or PETG** (I used PETG - less brittle, but ABS worked for one of the sections, too) print: * 12 x `girder plate.stl` - 100%-20% infill all will work - since the parts are very small, it doesn't make much difference in plastic consumption nor printing time Other hardware: * a pile of M3 bolts in lengths of 8, 10 and 12 mm + M3 nuts. * 4 x M6x30 bolts + nuts for joints * M6x40 bolt + nut for phone holder * based on where you want to attach this contraption to, you can use screws or bolts up to M6 to attach table plate on. Ideas - wall, table, one of the enclosure sides. Other notes: * printing temperatures - according to your preferences for specific materials. I use: * ABS - 240ºC nozzle, 110ºC bed, enclosed * PETG - 235ºC nozzle, 80ºC bed, preferably enclosed * layer sizes - 0.2 is what I chose, others could be possible but I prefer smaller ones as there are relatively many small details in those designs. * materials - ABS could also be glued together for additional strength using acetone * post processing - haven't tried but I think this thing should benefit from annealing (optional) * I believe these things, as they do serve structurally and do not require much dimensional accuracy * after that they can be drilled to size if necessary * different parts should deform evenly if treated together, so they'll still match