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If youve seen my new roaster you will have noticed that I used a car power window motor. The benefits are;
12 volts (safe and the volts can be lowered to reduce RPM)
geared for smooth jerk free operation, high torque and low RPM.
output shaft is at a 90 degree angle to the motor for a lower profile.
The disadvantages with power window motors is they have thermal cut switches that interrupt the power circuit during an overload/over use scenario - this feature is deliberately over-sensitive to quickly kick in when a nuisance wants to repeatedly operate a window. Therefore a wiper motor is probably a better option as it will handle a much greater load before tripping.
And that is what I was worried about mine; I was expecting the motor to stop at the critical stage of the roast. Luckily it just kept on purring beautifully (Japanese made for Honda!). Feeding it 6 volts had greatly reduced the chance of an overload situation.
Since then Ive been searching online for a gearhead motor and came across a few at Jaycar. These start at $14.95, have high torque and low RPM - an theyre geared but have a straight shaft and not the right angled low profile shaft as in the motors mentioned above. Part number YG2732 is the entry model, but I think part # YG2734 is the better option due to its much higher torque output and lower RPM (36 as opposed to 70). Price is $24.95
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