One common method is to fix one end and tighten the other end in a drill chuck. Apply tension to the wire while turning the drill slowly. This works well but I find it can be tricky to detach the wire from the drill without putting kinks in it.
The method I'm going to describe is to build a jig. It works well and only take a few minutes to build.
Step 1: Materials and Tools
- A length of wood to fix the jig to. Can be as long as you like. The one I used is about 1.5 metres long -- that's about 5 feet in American units or 1.5 meters in American metric :-)
- Two eye bolts
- A 'D' shackle
- A turnbuckle
- A drill
- Wire cutters
- Eye protection
Step 2: Making the Jig
Attach the turnbuckle to one of the eye bolts with the 'D' shackle.
That's it, done!
Step 3: Using the Jig
Tighten the turnbuckle and the wire will automagically straighten as the tension increases.
WEAR EYE PROTECTION! It's all fun and games until someone get a piece of wire in the eye if too much tension makes it snap.
When the wire is straight snip it off at each end with wire cutters.