Hi I'm new to this site. I've be reading everything I can about making a DC motor controller that will run a home built mill I'm making. I do gunsmithing work and I cut parts from sleel and aluminum, I don't have a lot of room in my shop for a bridgeport and all of the pieces I work with do not warrent such a large machine. I've tried the drill press thing with a x,y table, but I want to built something stiffer with, hopefully this 2.5 hp, 5600 rmp 120 vDC motor and all the controls that came from a working treadmill. I am searching for advice to either use the components I have, or to just buy a KBMM-125 or KBMD- 240? I understand enough about the circuitry to get me I trouble. My trade was a metal fabricator 40 yrs. Testing I have run this motor with a 5A Variac to bridge rectifier. I would run very smoothly slow to fast rpm, But I thought the torgue was missing when I put a load on it. It also popped a breaker when I loaded it with at slower rpm. I'm sure the 5 amp variac didn't like that either. I ve read on this forum or another someone telling someone to buy a KBMM PWM controller and it would pulse 120v dc to the motor varing the speed and torque would also be there at mid range rpm's. I looked into buying one on Ebay but the Kbmm-125 goes to 90v and the KBMB -240 is 230v and supplies up to 180vdc I my memory serves me. If I buy a KB, I still think I need a pot. and resistor and a fuse also? On the other hand, I may very well have all those goodies at my disposal and not know it, also not know how to configure them to make a controller. All I need is ON/OFF and varible speed. I have taken pictures of the components I have. I just have to figure out how to post them here. Hey got the pic's. Any advice appreciated, thanks Pat.
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