I know a good bit about mastercam 9
but my first attempt at chamfering failed, and even combing through all the books ive got the only part they showed on chamfering left me clueless

i make a contour, select 2d chamfer
leave the depth at 0 select the chamfer box
here it says the chamfer will be determinded by the distance in x and a tip offset, so how do i calculate for the chamfer i want?


i used the 1/2 x 45 tool they have made it .25 over in x and left the tip offset at .1 as the book suggested but it alarmed on me