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Old Sep 04, 2012, 11:30 AM
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Cardiff, UK
Joined Aug 2008
358 Posts
Question
Hot Wire Foam cutter power supply

Hi All, looking at building a hot wire foam cutter to cut 1 meter wing panels. I do not want to build my own power supply and would prefer to use something 'off the shelf' as i'm not too confident in my electrical ability.

I have found this

Fusion PS200 Adj Power Supply [FS-PS200ADJ] 40.84

The PS200 Adjustable is a regulated 5~15V power supply with current limiting from 0~15A. With an LCD readout showing the voltage and current being supplied, it can also be used to charge Lead Acid batteries.

Features
Input Voltage: 220~240V AC
Output Voltage: 5~15V DC Regulated
Current Rating: 0~15 Amps
Output Connections: 4mm Banana Sockets / Clamps

Will it be okay to use? I have used the foam calculator and have seen that 12v and 3A is needed for this length, but the advantage of voltage and amps adjustment is that i could use the power supply for different size cutters if needed. Do you think this power supply would work, its quite cheap @ ~ 40 delivered.

I have noticed it could output 15v @ 15A, is this a bit dangerous? Ideally i would like one that is quite safe if i turn the dials the wrong way by accident!

And does anyone use any type of fuse to prevent melting the internals of the power supply?

planning on using guitar string top-e as advised,
Any help greatly appreciated

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