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IndustryArena Forum > Other Machines > CNC Wire Foam Cutter Machines > I need help for select power supply for hot wire
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  1. #1
    Join Date
    Feb 2007

    I need help for select power supply for hot wire

    Hello every one
    Iam beggining a small cnc foam cutting machine
    Cutting area 40” x 30”
    Wire lenght max 35”

    The machine body and cnc moving is not a big problem,
    I have built some cnc routers and this part is fine.

    I have Nichrome wire Rene 41 cal 27, from Jacobs,
    4.02 Ohm/foot

    I need help to select the power supply for heat rhe
    In jacobs online calculator for that single wire lenght
    Transformer Should be 25v and 2.6 A.

    I have some transformers, but I don’t know wich one
    I can use.

    1- A Power Electric RT-625A transformer
    I think it was from an old Back UPS.

    2- Switching Power Supply .
    HSTNS- PD02
    Mod- DPS-700CB A
    Output 775 W -12V 64.5A

    3- A small welding stick machine that gives
    Arpund 30V and can hold 200A

    4- A complete APC 500 Back UPS
    without the battery

    For different wire lenght
    I think to build a voltage regulator
    using a Triac 600V 35A.

    Can you help me to select the right transformer

    Thanks in advance for read and help me
    Sorry my bad english

  2. #2
    Join Date
    Nov 2013

    Re: I need help for select power supply for hot wire

    I have made one of those before and would suggest something like this to control the power going to the wire. It is basically an industrial dimmer switch and could possibly work without a transformer. Crydom may have products better suited to your particular application. This will get you pointed in the right direction at least. Come to think of it, you might try using a dimmer switch if you can get the wire hot enough with the 1 amp or so that they are rated for.
    Good luck

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