Changes

The Proto-Form has an oven surface for heating and softening the plastic. It is made of multiple nichrome wire elements, draws 7200 watts, and reaches full operating temperature very quickly.  

The Proto-Form has an oven surface for heating and softening the plastic. It is made of multiple nichrome wire elements, draws 7200 watts, and reaches full operating temperature very quickly.  

The most likely source of problems would be for someone to leave the plastic under the heater for way too long and set it on fire. To help avoid this error, the blueprints suggest that the oven's power switch should be a five-minute timer. Alternate options include adding a "deadman switch" such as a foot pedal. In any case, defeating any safety devices must be considered cause for revoking authorization.

The most likely source of problems would be for someone to leave the plastic under the heater for way too long and set it on fire. To help avoid this error, the blueprints suggest that the oven's power switch should be a five-minute timer. Alternate options include adding a "deadman switch" such as a foot pedal. In any case, defeating any safety devices should probably be considered cause for revoking authorization.

The plans call for 18" of clearance on each side of the machine during operation, and 36" above. This will be difficult to idiotproof, but the clearance requirements will be clearly displayed on the structure of the machine. The top surface will have projecting vanes to prevent accidental blockage of the vents.

The plans call for 18" of clearance on each side of the machine during operation, and 36" above. This will be difficult to idiotproof, but the clearance requirements will be clearly displayed on the structure of the machine. The top surface will have projecting vanes to prevent accidental blockage of the vents.