folding table

[MARCOC]

hello to all, I was trying to figure out how the bending table works, but I did not find any precise explanation on both the fields and on its operation, I tried to make a simple l to 90° thickness 1mm
but development doesn't come back

Can someone give me information about it?? ? ?
the fields where I wrote should be correct.
first thing if he in the model does not find a pious 90 internal radius1 gives me error in development? ? ?
second what does development not return to me? ? ?Where does that 4 come from, which should be 3,142? ? ?

thanks and who can make me understand

 

[Zac69]

I am not an expert in this matter, but I think the problem is due to the k factor not set correctly

 

[MARCOC]

Can't anyone give me an answer... No one uses the tables or has he ever helped us? ?

 

[Matteo Cappelli dis.CAD]

Hi.
vague memories... .
in the design folder data\bend tables find the file banda table (mm).xls
open it and impose the thickness valueformulas, update the table.
at this point selections to make the copy-pastein inventor create a new table-based explanation rulepositioning the mouse on the crossroads-table, paste...prove ....