http://www.bladeforums.com/forums/showthread.php/1125701-Knife-making-book?p=12845172#post12845172
VFD Variable Speed made simple
Step pulleys are not as cheap as you may think
Maska cast steel pulleys are good and well balanced $75 EACH here plus shaft, bearings, belt
It all adds up to about 1/2 the price of a KBAC-27D
I like direct drive with no belts using a VFD and 3 phase motor for about $200 over the price of the step pulleys with much finer control.
Yes you can get cheaper NEMA 1 VFD’s and build your own enclosure
You may find them cheaper at other retailers and on Ebay direct from china.
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 many are happy with a 1700 RPM running at double speed.
Make sure it has a footed base for the KMG and NWG, or a C flange face mount for Bader, Bee, Wilton and GIB styles.
I get them on ebay, even with paying $80 for shipping to Canada I save $$$ on a used motor.
The 1.5 HP combination is the most common, as reported by Rob Frink
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 burnout the unit.
It has good community and company support, manuals, hook-up diagrams, photos and settings on Rob Frink’s website.
I like the fact that I can buy it from a local distributor in Canada.
Travis W reports running a 2 HP on a 110v circuit, but I haven’t tried it.
Hookup is dead simple
http://www.beaumontmetalworks.com/VS-setup.html