gibbscam postpros

hello, I couldn't find anything on this subject so I'm calling on you. I currently have a prototrack that I code in mx3 with gibbscam. the machine fails to create helices by programming an arc (critical error). so I started to modify the composition to program a propeller.

here is my problem: I get the wrong starting angle of the propeller in relation to the x axis so that the machine knows where to start. for the moment I have no track to have this variant.
If anyone has a solution to my problem, that would be great!

translated with google, sorry I don't speak English.
jonathan