Hi all I have a question about roughing a 1/4 rad.concave profile , all I wanted to do is rough and finish a 1/4 rad. groove in a 1"dia. round bar this is being done on a Viper lathe with a fanuc 21i controller , it wants to try and take the full rough depth of the radius at one time I have the program that I used and ended up just using large x+ wear offset and decreasing it after every complete cycle to get what I needed and the radius turned out fine but there has to be an easier way. I may be using the wrong canned cycle don't know for sure ? I have the program listed below any help I would be grateful.
O9997(OD CONCAVE .25 RAD.)
G0G28U0.
T0303(.170 RAD.TOOL ROUGH)
M91(main spindle call)
G92S1400(max. r.p.m.)
G96M03S575
G0X1.1Z-.92
G71U.05R.02
G71P1Q10U.02W.005F.008
N1G1X.83F.01
G2X.83Z-1.25R.08
N10G1X1.1
G0Z-.92
M1
T0303(.170 RAD. TOOL FINISH)
M91G96
M03S600
G0X1.1Z-.92
G70P1Q10
G0G28U0.
Z5.
M91M5
M30