[bbqa01]

I use MasterCam X3, wire EDM,
Two circle with same center point, The inner start cut from inside and outter is start cut from out side,
I don't know how to select toolpath for 2 circle at same time? (mastercam only have inside or outside in lead out setting!!).

[John_B]

I think if you reverse the direction of one in relation to the other it will make the lead-in move be opposing each other in direction... Seems that is what it has done to me when selecting circles for milling.

[bbqa01]

John_B, I tried your way but "not success" !.
Can you tell me more detail about parameters setting ?
Thank you.

[Superman]

The trick is how you select the chain/s ( your closed chain is selected by the entity that you select first, with the nearest endpoint being the start point of the chain )
( this assumes that the start point of the circles is at the 3 o'clock position ( zero degrees )

So for the two circles
inner circle, select above the RH quadrant point on the circle ( it will show 2 arrows ( big for direction - should point CCW, small for the cutting side -should point to the centre )
outer circle, select below the RH quadrant of the outer circle ( big arrow points CW, small arrow point outwards )

if you do select wrong, that chain can be reversed using the red arrows in the "Chaining" dialog box. Or you can delete that selection & re-select to go the correct way
( for the "chaining" dialog box - hit the cheveron, in the upper LH corner, for additional advanced options ( moving start points etc.))

PS - avoid using the WINDOW to select entities, always pick the chain