Re: [mill_drill] Variable Frequency Motors
- Hi John;
We put a Mitsubishi VFD rated for 5HP on a circa '29 SB 15 in my
neighbors shop a while back. This was used with the Westinghouse 3
phase motor that was either original, or old enough to have been mounted
on the lathe when it was new. Truly wonderful little devices, superb
speed control and regulation. We used the old drum switch to control
the low voltage reverse signal lines from the VFD and put the remote
speed control and a pilot light in a die cast box mounted to one of the
overhead drive castings. Even found a very old Bakelite knob and
jeweled indicator lamp bezel. Hid the VFD on the rear of the machine in
an area where it would be safe from chips and oil. We ran all the wires
to the controls through Greenfield (just to look original.) From the
front, the machine looks like it is a nicely restored OLD machine, you
just know something is up when you have this ancient knob giving
At least one other list member purchased a VFD with a matching 3 phase
motor after several of us suggested going with a VFD in response to a
posting about going over to 3 phase motors. He posted afterwards that
he was very pleased with the results.
Many folks have commented favorably on their dealings with Dealers
My neighbor bought his from Bill Therry of Therry Brothers Machinery.
Great folks, but unfortunately they are sold out of the large batch of
controllers they bought.
> jwalters wrote:
> Has anyone had experience with variable frequency 3-phase motors on
> any shop
> equipment. Does anyone have a source for purchasing these motors.
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