Characterize DC motor

[aurmer]

I have experience with electronics, and I am just starting out with electromechanical.

I bought this motor on the cheap (attached image), and I would like to characterize it to know what NOT to do with it. All it says is 24VDC. I tried looking up the part number, but perhaps I don't know what site to find the spec sheet on?

If the spec sheet is obviously available, then I missed it. If not, what can I do to determine the motor's limits? Most importantly an amperage limit.

Thanks for any guidance.

[mjkuwp]

Browse Pittman motors site

http://www.pittman-motors.com

They have excellent resources

Also, you may find good information in one of their videos


and this
http://www.pittman-motors.com/Portals/0/Resources/Understanding_DC_Motor_Curves_and_Temperature%20_pt1.pdf

The 24V is a nominal rating but the motor will operate over a wide range.  The current limit is, of course primarily related to heat.

Do you have a lab power supply?  A photo tachometer or some other means to measure speed?

[rstofer]

Arrow is a huge distriibutor of electronic stuff.  Have you searched their site?

[aurmer]

My next question is, what is the least expensive way to measure the stalling torque of a small DC motor? After a youtube search, I see that this guy has the right idea.

I suppose I can literally rig up an arm length, and a weight, but in terms of 'torque measuring equipment', what can I find on the low end? How well could I expect low end equipment to perform? +/-10%? 25%?

Do you have a lab power supply?  A photo tachometer or some other means to measure speed?

I have a power supply, but I have no means to measure speed. The photo tachometer looks promising; I believe I am in for one tomorrow.

Thank you for the video link. It was enlightening.

Arrow is a huge distriibutor of electronic stuff.  Have you searched their site?

I wasn't able to find my exact model, but I did find some 403a series motors from Globe Motors. The 24V models I saw in a spec sheet had a max current just over 1A. I think I have an idea now. I can test this through my benchtop power supply and monitor the current as I play with it.