Quote:
Originally Posted by coleasterling
It really depends on what bend radius you want. With copper, you typically want a bend radius a little over the material thickness, at least in the thicknesses we're working in. So for a 20gauge sheet, you'd want around an 0.040" radius. That should be pretty doable even with a home-built brake.
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I don't think that the bend radius is critical. As long as it is reproducible, the hole locations and bend locations can be adjusted.
We had to ream out the holes on the top copper sheet during construction of my DC controller - the bend was not perfect, and the holes were lined up for the lighter gauge.
Are you getting the holes drilled as well? If so, it would be great if the bends were marked. I don't know what the convention is - perhaps a scribed line on the outside of the bend, showing begin and end of the bend? Or maybe a bit of slop for non-perfect bend alignment (perpendicular) ... 0.125" maybe?
This is just me guessing - I'm sure you have a solution already!