Tuesday, January 6, 2026

Mod-8mm Film - film transport experiment looks promising

Practical work on the idea of 8mm wide film without sprocket holes to make more room for the frame images. Diagram attached. Here my dead old Sankyo 620 Super-8 camera moves film again with a stepper motor drive repurposing the pinch roller sound drive. Testing here using outdated film with sprocket holes which gives a measuring standard to check out the movement. The “drift” effect is expected. What we are looking for is a smooth steady drift.



There are 2 test cartridges. The other one gives “rough drift” and from that I learn that the Nema 11 stepper motor is running with only just enough torque. I need to evaluate Nema 17 or the physically longer higher torque version of Nema 11. “Rough drift” video:


Photos:

About Mod-8mm





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