A little help with grinder setup.

R

rscoffey

Joined
Sep 12, 2006
Messages
109
A while back I was fortunate that the boss let me order a KMG grinder. So far, so good. I set it up using the motor I had been powering my old Craftsman 4 x 36 with. This is a motor I found in a surplus yard for $15 and used pulleys on for speed control. Well, I am becoming less and less satisfied with this setup. I can stop the grinder with my index finger (have the scrape to prove it).

I've read a number of posts about others using a VFD to regulate the speed of their tools and it seems the more reading I do, the more confused I become.

Since I do not have 220v in my garage (workshop) and installing it is not an option, I am looking for another solution. I thought getting a 1.5 hp, 115v motor might do the trick, but I don't want it to run a 3600 rpm. I think a VFD is the answer, but when I look at the specs, they talk about horsepower, 115v in and 220v out and so forth. I know almost enough about electricity to keep myself from being electrocuted and I'm gettin' lost.

What I would like to achieve is a motor I can plug into the wall and have a method of varying the speed. Sounds so simple, and yet...

Can someone give me a little assist?

Many thanks

Bob
 
VFD Variable Speed made simple

Simplest, and cheapest are hardly ever the same.

Yes you can get cheaper NEMA 1 VFD’s and build your own enclosure
Or you may find them cheaper at other retaillers, but watch shipping.

Wayne Coe
http://www.waynecoeartistblacksmith.com/Motors___VFDs.html

VFD-
KBAC-27D

Motor
3 phase 220v 1.5 HP motor, TEFC, frame 56 or 56C, RPM is up to you.
Make sure it has a footed base for the KMG, or a c mount for Bader and GIB styles.
I get them on ebay, even with paying $80 for shipping to Canada I save $$$ on a used motor.


Wiring kit
Wiring kit - for 115v VFD includes 8' 14 gage molded cord, 2' 4 conductor wire for from VFD to motor, cable glands, wire nuts and grounding connectors $45.00 including shipping CONUS.


The 1.5 HP combination is the most common setup, as reported by Rob Frink in some thread somewhere
It allows you to plug into any 110vac, 15 amp outlet.
A 2 HP motor requires a 220vac input.

There are cheaper VFD units like the TECO, but the only VFD I have found that will run a 1.5 HP motor on a 110v 15 amp input is the KBAC27D

It is NEMA4, sealed from metal dust that can smoke the unit.
It has good community and company support, like the manuals, hook-up diagrams, photos and adjustment settings on Rob Frink’s website.

I like the fact that I can buy it from a local distributor in Canada.

Travis W reported being able to run a 2 HP on a 110v circuit, but I haven’t tried it.

Hookup is dead simple-Here's how
http://www.beaumontmetalworks.com/VS-setup.html
 
Last edited:
I bought my 2hp motor and vfd from wayne coe and he sent real clear instructions on how to wire it up. Took me like 5 minutes to wire it up.
 
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