Is this calculation correct ?

Sorry, I can't see it will work for you. I hope anybody else can give you hope.
The quadratur table are from the datasheet for PEC11 Series - 12 mm Incremental Encoder
Pelle

Edit: Look in the datasheet, there are a D in the end of the doted line, could it mean "DETENT"??

The encoder could also be delivered without detents???

A little bit confusing..........

enkoder3.JPG