I routinely sharpen knives at work, and my chefs have a multitude of
sharpening devices from stones to handheld diamond devices to wet wheel
machines and a work sharp.
Anyway, I was given a Takagi enclosed wet wheel machine— but it
is from Japan, and only designed for 100V.
What is the simplest way to adjust the voltage so I can use it on
the 120V power here without burning it up?
( Note: not a modder here— so I’m not going to solder any contraptions together)
Wellp, you can find a 100V-to-120V adapter… somewhere.
Sure you don’t want to wire up a contraption?
For only 50W (ie, about 2A), you can get a 120V transformer with ~20V secondary, rated at least 3A. An 18V secondary is closest, 24V/25.2V next closest. Wire the secondary in series with the primary. You’ll see either ~140V (in-phase, step-up) at the ends, or 100V (out-of-phase, step-down). Go for the latter. It’ll be like a fixed-voltage variac.
You can use this cheap little module. Additionally it can also control the speed of your motor. No solder required, just screw the wire to the terminals :student:
Dunno if I’d use a dimmer circuit on an induction motor, though. They strongly prefer pure sinewave AC, not chopped. They also tend to overheat at the slightest provocation because of harmonics.
