The reel platforms support the reels on a flat surface and are used to mount the motors for advancing the film. You will need to build TWO of these.
1: Cut the following pieces of 80-20 T-slot aluminum and tap each end with a 1/4-20 tap. You should tap them to a depth of about 1/2". See step 3.
8x 12" (arms - positioned horizontally)
8x 3.75" (legs - positioned vertically)
2: Slide two nuts into each 12" piece. The side you put them in will face down.
3: Connect the pieces with the 3-way connectors. NOTE: I cut the bolts that were included with the connectors to half of their length so that I didn't have to tap the aluminum more than 1/2".
4: Attach the panel holders, 2 per 12" bar. This will hold the acrylic sheet. Don't tighten them all the way so that you can adjust them when you place the acrylic in.
5: If you have access to a laser cutter, you can laser cut the acrylic for the platform with this file. If not, you will need to drill holes as labeled in the file. One way to do this is to print out the file onto paper (may have to split it between two sheets and tape them together), and tape it to the acrylic and drill where you see marks for holes. I recommend using step-up bits for drilling acrylic, or you can just go really slow on your regular drill/press.
6: Insert the acrylic. Slide the panel holders into position and tighten them underneath. Bolt it to the panel holders using the 1/4"-20 80-20 flat-head bolts. If the holes don't quite line up, bore them out as necessary.
7. Locate the four outermost holes in the middle of the acrylic. Insert a 10-32 machine screw from underneath with a 10-32 flat washer to match and slide another washer onto the bolt from the top. Screw on the 1.5" stand-offs.
8. Solder lead wires onto the terminals of your motor.
9: Mount the motor with 10-32 machine screws. It's a good idea to affix the shaft coupler to the motor shaft at this point. In the picture only the bottom half of the coupler is shown. NOTE: If you were unable to source the motor I used (see parts list), then the mounting holes in the acrylic will be different and you will need to drill them yourself. The center of the shaft will need to be aligned with the center of the large hole in the middle of the acrylic.