I have a simple profile and no matter what I choose on CAMWorks for Solidworks 2018 , the post processor will not get it correct. I am running this on a Haas VF3 and this actually calculates I and J incorrectly every time. Below is the post. I did find a reference to the lead in value but nothing seems to work there either. I have a 0.498" Endmill and it has the correct diameter offset in the machine. The roughing post works but there is no G41 in that one. I get Tool Compensation errors every time.
%
O03106(LEAD IN AMOUNT)
G20 G17 G40 G80 G90
T06 M06 (1/2 EM CRB 4FL 1 LOC)
G54 G90 G94
S3000 M03
G00 G90 X-.4631 Y.2204
G43 H06 Z1.1 M08
G01 Z.75 F35.
G90 G41 X-.2793 Y.4043 D06
G03 X-.25 Y.475 I-.0707 J.0707 (dead here)
G01 Y1.75
X.5
G02 X1.35 Y.9 I0 J-.85
G01 Y.6663