Hello
Is anyone familiar with subprograms on a 4290 control.
I'm drilling 1015 1/4" holes in 3.0" sch80 stainless pipe. There are 44 rows with 23 holes per row with a rotation of 8.18 deg between rows.
I am currently using a separate machining operation for each row with a program stop at the end of each row to inspect the drill. I get 4 rows before the drill needs sharpened.
After sharpening I do a go to block to restart as the program goes it takes longer & longer to restart. If I could program a c axis location and insert a subprogram I think it would be a lot quicker. If anyone is familiar with this control I would appreciate some help.

THANKS
Dave