The switch is small, and has all the correct mounting pins and orientation to work in the direction it was designed for. After staring at switches and running the ejection motor countless times, I came to the conclusion that the best solution was to turn one of the switches around to work in reverse: once the motor started its ejection sequence (by an ejection switch), this switch would drop off the timing cam and close, giving power to the motor until the timing cam came around again to open it at the end of the cycle and stop the motor.
I needed at least one switch to open at the end of the ejection cycle to stop the motor so it wouldn’t eject all the pictures once it started. Two microswitches on the drive train showed promise for isolating control over film ejection to a simple mechanical means, but to my dismay, both were oriented in the wrong direction. Diving deep into the Polaroid SX-70Ī few blind clips later, and pressure on the correct points and I had the film mechanism in my hand. And even then, I wasn’t sure what I’d be working with once I got there. There were times I wasn’t sure I was going to be able to disassemble it down to the film pack and keep the drive train intact. So, after watching a few SX-70 disassembly videos, I filed a screwdriver head down to a 1mm square and jumped in with both feet. It seemed such a shame to purposely wreck one permanently.Īs a last-ditch attempt to find an alternative, I got a Polaroid box camera (Sun 600) and tore it apart, but found the motor and gear train were too high to fit into a pack camera. These cameras are becoming popular and they are an elegantly designed miracle. Polaroid SX-70 Sonnar guts A Polaroid SX-70 Sonar and a Model 450Įven after the decision was made it took me a while to get up the nerve to tear apart an SX-70 Sonar. That Polaroid camera happened to be a model 450.
Repurposing orphaned instant cameras: Creating the Polaroid "SX-450" - EMULSIVE Close Search for:
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