Question about electrical safety for a project with a 60V Power Supply and a Nema 34 Motor? Answered
Hi Instructables Community,
I'm working on a project with someone where we are making a VR game that uses a stationary exercise for interaction. For example, if you turn up a hill in the game while exploring a map, it gets harder to pedal.
The resistance on the exercise bike is controlled by turning a knob.
The knob just controls a brake-like device that adds friction to the flywheel.
We're just going to use a stepper motor to control the knob with a belt.
We, somewhat unscientifically, compared the torque required to turn the knob on the bike to how much torque Nema 17 and Nema 23 motors require to pull parts of a 3D printer back and forth and decided we probably need to use the bigger NEMA 34 motor.
The stepper motor driver and motor we are going to require a 50V or 60V, 5A DC power supply.
The motor will need to be attached to the frame of the bike near the resistance knob.
The stationary bike we are using is made of steel and very heavy and will be moved around a lot when people want to try it or move it out of the way. I'm a little worried that since the bike will be moved around a lot and since the motor will be connected to the bike, that if a wire got pinched or damaged it could lead to an electrocution hazard.
How can I make the electronics on this project as safe and fool-proof as possible?
My plan for safety right now is:
- Use a GFCI power adaptor to power the power supply (link)
- Keep the power supply and driver in a metal, grounded project enclosure (link)
- Ground the steel frame of the stationary bike.
- Keep the project enclosure fixed to the stand of the bike so that it moves with the bike when the bike is moved out of the way.
- Put the wires to the motor in some sort of heavy-duty insulation or conduit that's securely fixed to the frame to avoid any pulling/s shearing.
Any advice/feedback/recommendations would be greatly appreciated.
I don't have any photos of the set-up right now since this project is still in the planning stage.