For .6 ohms application foam cutter
11-06-2007, 10:14 AM
#1
For .6 ohms application foam cutter
What size in amps 24vac transformer do I need so that I won't burn it up?
2 amp lasted about 20 seconds before it smoked. .6 ohms is basically a dead short. I bought a hundred buck 8amp transformer, but am hesitant to try before I ask.
Thanks,
2 amp lasted about 20 seconds before it smoked. .6 ohms is basically a dead short. I bought a hundred buck 8amp transformer, but am hesitant to try before I ask.
Thanks,
11-06-2007, 11:04 AM
#2
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RE: For .6 ohms application foam cutter
Assuming Ohm's Law ( E = i * R) still applies these days.
E = 24 volts, R = .6 ohms then i (current) = E/R or 24 / .6 gives 40 amps.
I would venture that a 50 amp transformer would be reasonable since you would be loading it at 80%.
E = 24 volts, R = .6 ohms then i (current) = E/R or 24 / .6 gives 40 amps.
I would venture that a 50 amp transformer would be reasonable since you would be loading it at 80%.
11-06-2007, 11:10 AM
#3
RE: For .6 ohms application foam cutter
So if I use a dimmer switch on this transformer and not go over 4.8 volts, I'll be within the limits of the transformer. And then the question becomes 38 watts, and will it be enough to cut foam with this custom tool I made, probably not.
11-06-2007, 05:16 PM
#4
RE: For .6 ohms application foam cutter
ORIGINAL: seanreit
So if I use a dimmer switch on this transformer and not go over 4.8 volts, I'll be within the limits of the transformer. And then the question becomes 38 watts, and will it be enough to cut foam with this custom tool I made, probably not.
So if I use a dimmer switch on this transformer and not go over 4.8 volts, I'll be within the limits of the transformer. And then the question becomes 38 watts, and will it be enough to cut foam with this custom tool I made, probably not.
G'day Sean,
Use the dimmer on the primary side of the transformer, the high voltage side, start at the lowest setting & adjust up, until the wire is hot enough, it has worked for me.
We use 240 volts here in Aus, but your dimmers will work the same way, on 110 volts.
Light or electronic fan dimmers work well.
