how hard is it to wire a motor up to a kmg?

docdredd

docdredd

Joined
May 25, 2006
Messages
587
ok guys here is the skinney. i sold one of my cameras to buy a kmg. i plan on picking up a kmg8 sans motor. once i get a motor how do i go about wiring that bad boy up? i know im asking a broad question and wanting pointed answers but i just dont know alot about motors. Ide take a mass casulty any day i love trauma but i dont wanna cause any to myself hookin the dang thing up... savy? any hints or links would be gladly accepted
thanks
doc silas:D
 
Well Doc, in order to try and help, I've got a few questions:

- Single speed or variable speed?
- What (if any) motors do you have access to?
- What power do you have access to in your shop (115 or 220V?)
- What will your motor budget be?

Once some of that is fleshed out, I'm sure that once everybody around here quits making "my motor is bigger than your motor" jokes we can probably help you figure it out :D

-d
 
I don't know about a varible speed, but for single speed it's pretty easy. Most motors have a wiring skematic inside or outside the cover, just follow it and it'll come out rite. Just be carful and take your time and read the diagram.

I did screw one up one time and couldn't figure out why it kept tripping breakers and such. Turned out I wired it up for 220 and was running it off 120.:eek: Swapped the wires around and it's been running fine since.
 
deker said:
Well Doc, in order to try and help, I've got a few questions:

- Single speed or variable speed?
- What (if any) motors do you have access to?
- What power do you have access to in your shop (115 or 220V?)
- What will your motor budget be?

Once some of that is fleshed out, I'm sure that once everybody around here quits making "my motor is bigger than your motor" jokes we can probably help you figure it out :D

-d
Click to expand...

sorry a bit more info would probaly be called for huh?
ide love to pick up a varible speed motor, but i will settle for a fixed speed if i must:D right now im saving for the motor and i have no idea what they cost:foot: my budget will be whatever i have to save up to get somthing that will be dependable! i dont wanna dump 900 into a machine that im gonna rip in half the first time i install some mystery motor. i have access to both 110 and i also have 220 lines in my shop.(bought my house from retired electrition) and let me tell you this man knew how to set up a workshop. heck the shop was one of the main reasons i bought the house:D thanks for all the help guys.
doc silas
 
docdredd said:
sorry a bit more info would probaly be called for huh?
ide love to pick up a varible speed motor, but i will settle for a fixed speed if i must:D right now im saving for the motor and i have no idea what they cost:foot: my budget will be whatever i have to save up to get somthing that will be dependable! i dont wanna dump 900 into a machine that im gonna rip in half the first time i install some mystery motor. i have access to both 110 and i also have 220 lines in my shop.(bought my house from retired electrition) and let me tell you this man knew how to set up a workshop. heck the shop was one of the main reasons i bought the house:D thanks for all the help guys.
Click to expand...

OK, so, the inexpensive method for variable speed is to set up step pulleys so you at least get 3 or 4 speeds. Rob @ Beaumont has some really nice step pulleys, but if you're on a budget, do a little google searching and you can probably save a few $$. That will also simplify your wiring since the motor will only be going at one speed. Just make sure you get pulleys with the appropriate bore for your motor shaft and the shaft on the grinder drive shaft.

For finding a cheap motor, look in the yellow pages for a motor repair shop. Give them a call and ask if they ever sell used or repaired motors. I just did this to find a new motor for my power hammer and found a 3/4HP motor for $20 (I'll be returning it tomorrow to "trade up" to a bigger 1.5HP motor for an additional $40). Also, if you find a good motor shop you can talk to the guys there and they'll show you how to wire up whatever they sell you in about a minute.

If you go with step pulleys, a 1725RPM motor of about 1-1.5HP will probably serve you well. If you've got 115 and 220 available, you're not limited to 115V which may find you a good deal on a motor as well.

Hope that's a good start for you. If I didn't answer a question you were thinking of, let me know.

Let us know how it goes!

-d
 
Deker thanks alot man
this is enough to get me started. and more than enough to make me dangeros...hahah a thanks a bunch
peace
doc silas
 
I wired my KMG motor myself. And I am an electircal moron. If you can follow knifemaking processes, you can read the chart inside the motor electrical box and wire it up. No need to hook it to you KMG to see if its wired right....
 
It should be pretty easy to due. Like David said if you can follow knife making process your smart enough to hook up a motor.
 
I picked up a good 190V DC on Ebay with controller. Factory fan. Called the guy and asked if he could pull the motor and sell the fan himself, he was more than happy to do that.

With controller I think I dropped under $150 to my door. Don't have any problems hogging metal with it.

As to wiring, it will depend on the motor/controller, most have instructions.

--Carl
 
hey guys thanks alot. its nice to know that when u gotta a question all you gotta do is drop a line. works alot better than figuring all this stuff out the hard way!
peace
doc silas
 
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