Kermit said:
Another link to cuss, or is it discuss?
http://www.reliance.com/mtr/mtrthrmn.htm
Be prepared, this one will be to complicated for most but will be elementary to others.
Good link, not to bad a read. Does answer at least to my level of understanding why the brushes on my doner motor are off center
One method of reducing the arcing due to non-linear commutation is to shift the brushes away from the geometrical neutral position.
Motor is designed to favor one rotational direction, so I better get my rump out and walk the talk, remount the motor to agree with its build design.Fortunately its supplied mounting system makes this an easy change.
All these links for DC Power supplies have there merits, and I can see the 12/24v 15amp unit as a controller for say a windshield wiper motor powered hacksaw controller for those who just like to be a tad off the bubble.
I made the switch from the original AC driven system 'cause I'm lazy. Switching belts around gets tiresome in a hurry and I avoid using the backgears, if I bust em replacements are hard to find. DC drive therefore sounds like the solution.
What do I want this conversion to do?
Make the wheels on the bus go round and round. Problem Stated
Considerations
1. I'm clueless
2. I'm cheap
3. Minimal thinking
4. Easily available
5. Skill level
6. Not burn the Barn Down!
1. Clueless and Cheap, searching around for the results of others who have tackled this conversion bring up as a common denominator, Treadmill Motors
2. Minimal thinking and availability, Treadmills are designed is as many shapes and sizes as a womens dress, finding one that is suitable just a metter as lookin over the racks (E-bay, Craigslist, local thrift stores) till one jumps out and says Howdy.
3. Skill level, I have seen items on this board that in my wildest dreams I could never match with my stone axe and hammer view of the world. As much a bolt on operation as possible for this thick head.
"Treadmill" motor is there, pulleys are there, mounting brackets, controller and various pieces of stock all in one package. All for under a C-note, or rather 69 GBP, 125CAD, 154AUD.
As reported by the ol Kill-A-Watt meter the converted unit draws around 5 amps, well within the components capacity. All wires securely attached and a new GFI in the wall plug circuit. All in all pleased with the conversion. Room for improvement, sure, will it happen, maybe. Its functional, does what is asked of it.
But whitout post such as
[author=Kermit link=topic=4210.msg44098#msg44098 date=1235313068]
I would not have gained further insight into the working of DC motors.