Hi Everybody,

I have been having some issues with getting the right flat patterns that have bends with other than 90 Deg.

I have my own database of BD for ALU and Steel Sheets.

I do manual testing on the floor with my press guy and my 90 Deg samples are quit spot on.

The BD is very accurate on my 90 Deg Bends.

I use this formula below to get NON 90 Deg bend deduction value.

BD for 90°/ 90 X Needed Angle

**EX: ( in mm for ALUMINIUM 2.5mm TH, Bend Angle 36° )**

**4.09 / 90 X 36 deg**

0.045 X 36

**BD = 1.62 mm**

I got this formula from this forum but I am not sure if it has worked for me.

It just seems to be too simple to be truth.

Thank you for any help that you can offer.

Fred

Hey Fred!

Using my own Excel based calculator I get the following:

Most every time I needed to calculate one bend angle it was returned back to parallel on the next bend so I added the complimentary angle to my Excel sheet. I know 'European' angles are different, are you sure you're entering the actual bend angle into SW? I'll bet you are.