[Payload] Polystyrene (EPS) cutter

Video with simple proof-of-simplicity example *sorry i am using a different video, but you get the point probably*

http://www.youtube.com/watch?v=q6oU2e5zxLA
In the video, just 3.7 V’s was applied with (measured) 2.5A current. The smaller the wire, the higher the current, so don’t get the wire too small.

Sizing it up

[caption id="attachment_1304" align="aligncenter" width="300" caption="A 50cm hotwire!"][/caption]
What you see in the image above, is a hotwire running over a steel thingy i had lieing around. It’s a good 50cm, ideal for cutting anything. I just wired it up directly to two LiPo’s (in series) having a total of 8V. LiPo’s have a pretty low internal resistance, so that will go fine, as long as you have the nichrome wire in place. I have nichrome wire that has 7 ohms per meter. I can not suggest you get a lower resistance than that, or the lipo might blow up. Anyway, i loved it, it cuts through EPS like butter.

Applying it for nylon cord cutdown

That’s easy. Just connect it to a simple relais (or some strong minimum 2A MOSFET/transistors). Just let any processor flick a switch and the nichrome wire will be glowing hot, cutting through anything nonmetallic (until it cuts itself). Disclaimer: i advise you not to try this at home. ]]>

You may also like...

1 Response

  1. September 16, 2011

    […] Making a proper antenna. Making a ‘hot-wire’ cutdown mechanism. Cutting your styrofoam. […]