16mm Film Processing Stage

thingiverse

These assembled parts, including a 2ft section of 4" PVC pipe, an end cap, a 36" length of flat punched bar, and several bolts, form a processing stage for a 16mm film processing machine. The film stock is threaded over one roller, under the other, and back up over the first roller again. The film can then be slowly pulled through the tank to immerse it, roughly 48 inches at a time, in any chemical solution that won't damage the pipe. A top mount holds a pair of rollers and bolts onto the flat bar, resting on the top of the PVC pipe. The spacer piece is designed to prevent the free-hanging bottom of the flat bar from swinging, keeping the bottom roller firmly centered in the pipe. The bottom mount piece provides an attachment point for a 1/4" bolt at the bottom of the flat bar, used as an axle for the bottom roller. It's recommended to use corrosion-resistant hardware here, especially a locking nut for the axle, so that the rotation of the roller doesn't move it. Some results can be seen in the following videos: https://www.youtube.com/watch?v=dFDyr2IUXQo https://www.youtube.com/watch?v=Bx1UGwYp3nc