HF 8x12 lathe variable speed conversion

gt40

Enlightened
Joined
Oct 13, 2009
Messages
443
Location
bainbridge island
I am starting this thread to document my conversion of my HF 8x12 lathe to variable speed.

I was able to pick up a kb multi drive for cheap. The model is KBMD-240d. It has the capabilities of the kb controller that has been posted about in another thread and puts it all together in one box: forward, reverse stop and power + an led to show when it is has power going to it. It can run either 110 or 240 v and run both 90v and 180v dc motors up to 2hp.

I got one on ebay for 70 bucks with the optional heatsink thrown in and added the accessory forward-brake-reverse switch for 50 bucks. A bit more than doing the diy route but everything is in one place and it can run a variety of motor sizes via power resister.

Here are some pics:

Front:
dcfront.JPG


Heatsink:

dctop.JPG


Inside:
dcinside.JPG


Terminal:
dcterminal.JPG


forward-brake-reverse switch installed:
dcswitch1.JPG


dcswitch2.JPG


I also picked up a ge industrial motor on ebay. I am still learning as I go so I hope it will work but the price was right.

From the ad:

Amps:10.5A/0.76F RPM: 1725 Frame: 56 Volts: 90A/100F

Pics:
motor1.jpg


motor2.jpg


I was reading about shunt motors and they are reversible + variable speed capable. The controller is compatable anyways. Any thoughts on whether this is the best type to use or not would be appreciated. I am waiting for it to be delivered. I will post more after I get the motor.
 
Last edited:
Cool build :thumbsup:

Just one request ... would you resize the first six photos from their current 1280x960 to the size of the last two - 500x375. Slightly larger is no problem, lots of members post at 640x480. When the photos are huge, they can't be fully viewed on some monitors, especially if the monitor is displaying larger font sizes.
 
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