Build Your Own Foam Cutter

Choose any thickness of wire— from .005 to 0.25. Thin wires are safer and cut cleaner, but they sag and break if stressed. Large wires are more durable. Use the transformer and control unit shown. Design a fixture to hold the wire— use a spring to hold a constant tension in the wire. We offer components only— not instructions for building. This schematic is shown only to indicate how a system could be configured. Consult an electrcian or electrical engineer for proper wiring and setup. Transformer Specifications: Input: 115 volts Output: either 12 volts at 8 amps or 24 volts at 4 amps (you can hook it up either way). Size: 3 3/8" x 2 7/8" x 3" Capacity: .005" wire up to 12" long .010" wire up to 18" long .015" wire up to 24" long .020 wire up to 16" long Model ABT-2 $60.25 Delivered Price Model 18TP Control Unit $132.00 Delivered Price Model 18TP unit includes a standard grounded plug on a six foot power cord and a three-prong receptacle for quick and easy line and load connection. A lighted rocker switch turns power to the unit on and off; a case-mounted, easy-to-operate 270°-turn potentiometer provides variable control of the RMS output voltage. Unit chassis are designed for portable use or 2-hole fixed mounting. 120 volts AC, 50/60 Hz, 10 Amps, 1200 Watts Power Circuit: power semiconductor with parallel r-c circuit Control Circuit: all solid state circuit for stable, full-range control Frequency: 50/60 Hz Output Voltage: 0-95% of input Overall Efficiency: 99% Power Loss: 1.5 watts/amp Control Input: variable resistance, 270°-turn potentiometer Control Power: 1 watt Fuse Protection: special "2 millisecond" fuses are factory tested and coordinated to protect the power semiconductors from short circuit faults. Input Connection: grounded three-prong plug. (NEMA 5-15P @ 120 VAC, or 6-15P @ 240 VAC ) Output Connection: three-prong receptacle. (NEMA 5-15P @ 120 VAC, or 6-15P @ 240 VAC ) Nichrome Wire -Tophet A -For cutting styrofoam -One-pound spool -Various sizes available -Non-Magnetic AWG #22 #24 #26 #30 #36 Diameter Inches .0253 .0201 .0159 .0100 .0050 Diameter mm .643 .511 .404 .254 .127 Ft/Spoot (approx.) 501 793 1,260 3,140 3,200 Ohms/ft 1.815 1.609 2.571 6.5 26.00 FOB CA

Foam cutter, Nichrome wire, transformer, control:

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