Electric Motor and Shield

Your best bet would be to talk to a few suppliers - they'll help you build up a picture of what you'll need, and after the first couple you should get familiar with the terminology and what sort of kit is available.

If you PM me your e-mail address (don't post it it open forum, admin will frown upon it an delete it!) I can send you a useful bit of blurb about motor selection. Click below:

Send JohnDG a Message

Superior Electric ( SLO-SYN stepper motors )

has an excellent tutorial booklet on steppers and step controllers.

http://mcsupplyco.com/uploads/Manufacturers/Superior.asp

I expect other stepper manufacturers do as well.

Thanks but I was saying that I do not need a stepper motor. I need a simpler AC or DC motor that has good torque density with these parameters.

I should have been more clear about that.

Hope this helps...

http://playground.arduino.cc/Main/DCMotorControl#.UxYRwfldWSo

You guys are great. The static I am trying to cut through in all this is to find what type of motors give the greatest power per volume or weight (at a reasonable cost). I sense some of these calculate these densities by neglecting all the other electronics that go to drive the thing. I want a variable speed compact device for a simple application with occasional use and am wondering if the old fashioned brushed DC motor is the best choice.

Trident Engineering a good place to browse small motors. Usual disclaimers.

http://www.tridenteng.co.uk/