Hi people,
I am an inventor collecting components for a new device. I currently require a set of durable motors able to operate with precise and fairly high (3x/sec) speed of rotation for extended periods of time, as well as deliver momentary bursts of torque in a 3-cm blade equivalent to perhaps the weight of someone flicking something with their forefinger from a standing start. Obviously I’d also prefer vibration, noise and overheating to be kept to a minimum.
I hope that makes sense and that you might be able to offer me some advice on a suitable model. I am unable to decide whether DC, servo or stepper would suit the purpose, let alone which model. Why should I choose one over the other?
Thanks!
Would you be able to give some details as to the actual application itself? The more information we have, the better we can help.
Not a whole lot, sorry, it’s still in process.
As I said, long-term continuous rotation at 100-200rpm as well as that momentary flicking motion are crucial. There will be almost no load bearing BTW and I’ll have an Arduino for control.
I think I’ve settled on something between 6-9 volts, does that sound right? Brushed give better torque at low speeds right? How long will they typically last for? Months, years? Would I need a sensor for precise control?
Thank you!
It really depends on your application. Most of the brushed DC motors we carry are between 6-12V, with some exceptions being in the 3V and 24V range.
Depends on the motor really.
A ballpark figure (which varies a LOT from one manufacturer to another) would be around 50,000 to 100,000 revolution projected lifespan under normal use before you see a decline in performance.
Would I need a sensor for precise control?
Correct - most people opt for an encoder mounted to the rear of the motor - you would ideally select a gear motor which already includes a rear encoder:
robotshop.com/en/gear-motors … shaft.html
