Input Rollers

This somewhat bizarre-looking contraption constitutes the input feeder. Each of the rubber wheels is individually sprung (by springs in the vertical tubes) to allow for some slight out-of-true running of the roller, which was difficult to avoid given the limited fabrication methods available to us when the project was started. We've acquired some better tools since then, and would probably use something much simpler if we were doing it again.

Brass couplings were made to adapt the mottley collection of roller shaft sizes to a uniform 3/8", that size being chosen to match a collection of small ball bearings that were on hand (from an IBM 26 card punch, if you're wondering). The bearings are held in mountings cut from aluminium bar and bolted onto the frame, one of which can be seen at the front.