OUT OF DATE - Work In Progress
The purpose of the drive train is to drive the take-up and feed reels. The design is modular such that a change in motor would not require a complete redesign of the assembly.
1. Can be easily assembled/disassembled with common tools
2. Parts are easily sourced from common online sources
3. Has enough torque to move a full 35mm reel from a dead stop
As a reminder, we have the design principles to guide you when making design decisions.
Smaller geared motors were also tested and worked. Permanent magnet motors chosen for longevity (no brushes).
You could use any size pulleys if you want. This may require adjusting where the standoffs are located so as not to overlap with the circumference of the pulley if it has a wide diameter.