Low-speed with high torque 3

[Juleen]

Hello, I am new here and don't know much about motors but I hope you could be kind enough to help me find what I look for.
I need a 240V electric motor with 5+ Nm of torque. It will run at 0-180 rpm and I wonder what kind of motor I should use that has that torque no matter what speed it's running at. 5x5x5 inches size or smaller would be nice.
Not sure about what to use for adjusting revs of the motor, preferably something small enough to fit in a hand-held unit.

As you can tell I'm clueless about this stuff which is probably the simplest thing in the world to you guys, but I don't know who else to ask so please bare with me.

A list of what specs the motor I need would be lovely.

Thanks

 

[LionelHutz]

I see the requirement for torque and speed but I'm seeing a bunch of possible info missing.

How accurate do you want the speed?

Do you need position control, ie, do you need to know the rotational angle of the shaft?

Do you need to know how much it has rotated?

The solution depends on the answers to these questions too.

 

[Juleen]

Doesn't have to be very accurate at all.
No need for positioning control.
No need to know how much it has rotated.

All I need is a motor that I can control the speed of.
I want one of those Leeson motors I linked and I was thinking of buying one of the Leeson control units just like sreid told me to do. That has to be good!
Anything else I need to get it going?

 

[LionelHutz]

OK, use the motor and drive you're looking at and you should be good.

 

[roydm]

Juleen,
Heres a suggestion, how about a cheap electric drill with speed control. You could replace the trigger potentiometer with a regular one and throw away all the surplus bits. Another good motor to use is a auto screen-wiper motor
Roy

 

[Juleen]

I done with my little project now and I want to thank you guys again for all the help you gave me! If it wasn't for you I would probably have given up when I didn't know what stuff to use. I owe you one!

And a picture! Leeson motor and controller work perfectly!

http://img521.imageshack.us/my.php?image=tamer11za5.jpg

 

[roydm]

Looks real nice, but what the heck is it?
My guess, some sort of reciprocating saw
Roy

 

[itsmoked]

Thanks for the comeback!

Keith Cress
kcress -

http://www.flaminsystems.com

 

[LionelHutz]

Interesting project. Glad it worked out for you.

LOL, I'm not going to say what came to mind when I looked at the pic.