I need to regularly (daily) cover and uncover a space (in a chicken coop) about 300mm x 300mm using a piece of ply or masonite.
The coop only allows for the cover to be pivoted across the top of the space. (Think dog-door flap).
I have a 12VDC reversible motor (70RPM) which will do the trick. I was thinking of simply putting a spool on the shaft of the motor and pulley above the flap and rotating the motor to wind in (and wind out) some cable (yarn, fishing line, braided wire).
The distance to be wound in/out would be about 400mm. A spool of 10mm diameter at 70RPM would wind that in in about 12 seconds which is fine. I’d use microswitches as a trigger to stop the motor.
Does anyone have any thoughts on:
- What to use as a spool
- How to fix the spool to the motor shaft (4mm D-shaped)
Any other advice would be great.
ps. the purple door is what I need to raise/lower.