Parts Express 3A Variac Variable AC Power Transformer 0-130 VAC
3A Variac Variable AC Power Transformer 0-130 VAC is rated out of 5 by 2.
Rated 5 out of 5
from 3A Variac AC Power SupplyThis item is better than I expected. Arrived quickly, packaged securley and works like a charm. The meter is very accurate and the variac does not hum. Just what I needed at the best price around. Thank you Parts Express.
Date published: 2014-09-14
Rated 5 out of 5
from Optimum unit for hot wire cutting EPS foam.I have used this item on virtually all of the stylus pattern EPS foam cutters, of which I am the original designer, and have sold for more than 20 years. It is absolutely the smartest way to power a foam cutter. The voltage adjustment is infinite from 0 to 130 volts. You typically need only about half the output to power a 60-inch, .014: inconel .wire, which is the ONLY wire to use when cutting EPS foam. It is the strongest, quickest to heat up, and with the least amount of stretch.This power supply comes ready to use. Simply alter a two-wire extension cord (eliminate the green ground if using 3-wire type) and attach the black and white wires to each end of the cutting wire. First make sure the unit is turned to zero. Plug the variable transformer into any 120-volt AC outlet and then plug the altered extension cord into the outlet on the front of the unit. Place a piece of EPS foam on top of the cutting wire which must be elevated so the foam piece will drop down when you turn up the voltage. I have found that the optimum heat is obtained when smoke rises from the cutting wire almost immediately after it has passed through the foam. This is the styrene residue burning off the wire. By keeping the wire elevated, and slowly increasing the voltage, you then pass a test piece of scrap EPS foam across the inconel wire allowing you to obtain the optimum heat. Good luck.
Date published: 2014-08-08