Variable Speed KMG on a "shoestring" budget

I can no longer see the pics also. They were working this morning. Is Pendentive's website down? I knew I should have made an acrobat document out of this thread when I first saw it. ;) -chris
 
Yeah...my website is down....I'm in the middle of getting the domain transferred. Email's down too....it'll be back up by Saturday hopefully....:rolleyes:


By the way, I found a 1 HP version of what I'm getting on ebay for $243. Just do a search for "1 HP motor" and you'll find it. Great deal if you don't need the full 1.5 HP (the max you can get from 110V).
 
still waiting for the domain to transfer...:( :confused: :(
 
Can this VDC device be attached to an existing belt sander? I have a 1x42 delta with disc sander. Its pretty good for knives I think but it spins to fast for knives and plastic at higher grits. I was thinking about using a router speed control or a fan control switch but someone said they wont work for brushless motors.
Can i just buy this control item and wire it to my delta sander?
 
You can get controller for AC motors, but they are generally more expensive. I'm guessing your sander is pulley driven, so you might consider changing out some pulleys for slower speed. Not as convenient, but with VS you start getting into a whole lot of money very quickly for a sander that may not warrant the expense.
 
Yes. But the circuitry is much more complicated, and expensive. That was the point of going DC in this thread.

There is a downside. DC current is a killer. AC throws you back when the current alternates from positive to negative, leaving you injured, but possibly alive. DC doesn't throw you back, you get stuck to teh contact point and fried.
 
Fiddleback said:
Yes. But the circuitry is much more complicated, and expensive. That was the point of going DC in this thread.

There is a downside. DC current is a killer. AC throws you back when the current alternates from positive to negative, leaving you injured, but possibly alive. DC doesn't throw you back, you get stuck to teh contact point and fried.
Click to expand...

Huh???
 
AcridSaint said:
You can get controller for AC motors, but they are generally more expensive. I'm guessing your sander is pulley driven, so you might consider changing out some pulleys for slower speed. Not as convenient, but with VS you start getting into a whole lot of money very quickly for a sander that may not warrant the expense.
Click to expand...

http://www.deltaportercable.com/Products/ProductDetail.aspx?ProductID=11470
Its a $100 setup. Very capable unit. there is a belt from the motor to the 42 inch belt but not much room to mount a drill press type wheel system. Ive been thinking about how i could modify it to tke drill press wheels. I dont know where i can buy the drill press whees though.
 
I think by "drill press wheels" you may mean "step pulleys." Do a search for step pulleys on google and you'll find all kinds of options. To save you a search, check out Tracy Mickley's site (usaknifemaker . com). He has grinder parts and supplies, as well as the popular no-weld grinder plans among many other things. Look under grinder parts in the catalog.

--nathan
 
surpluscenter.com might have pulleys you can use. You may not end up with variable speed, but you can at least change out the drive pulley to a smaller one to slow it down. The belt should be behind that disc where the guard is.
 
It is truly a nice job and the write-up is superb.:cool:
The only thing I can criticize is that metal/wood dust will likely destroy the motor before long.:( Blowing it out after each use will help, but an open motor will have problems. Those treadmill units are cheap enough, so it may not be a big enough issue unless you use the grinder a lot.

Again, nice job.:thumbup:
Stacy
 
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