You can use reference points to create a clearance position. Then you could set your clearance & retract points inside your pilot hole.

Is it possible that your using cutter comp & your lead in is not proper? In your "distance to go" can you see the machine making the comp along the length of the 1st contour?

One benefit of having your post output the redundant "Y0." is that your turning tool paths will remain on the same plane if you use a backplotter like CIMCO. The same goes for "C0." I often switch back & forth between Lathe & Mill backplot to view my toolpaths.

(PROGRAMMED BY - [email protected]) (PROGRAM - TAILTEST) (DATE - OCT.-09-15) (TIME - 06:23) (DRAWING NUMBER - TAILTEST) (DRAWING REV - TAILSTOCK) (OPERATION - TEST) (MACHINE - OKUMA LB3000) (ITEM NUMBER - P000) (PROVEN BY - ) VCHSW=0 (****************************************) N23 (POSITION TAILSTOCK Z5.0) VCHSW=1 (ACTIVATE TAILSTOCK OPERATION MODE) VTSWP[2]=VZOFZ-.5 (TAILSTOCK POSITION) VTSAP[2]=VZOFZ+.7 (TAILSTOCK APPROACH) VTSRT[2]=VZOFZ+5.0 (RETRACT POSITION) G195 SP=2 M55 (TAILSTOCK POSITION) M00 (****************************************) N24 (ENGAGE TAILSTOCK) VCHSW=1 (ACTIVATE TAILSTOCK OPERATION MODE) VTSWP[1]=VZOFZ-.5 (TAILSTOCK POSITION) VTSAP[1]=VZOFZ+.7 (TAILSTOCK APPROACH) VTSRT[1]=VZOFZ+2.5 (TAILSTOCK RETRACT) G195 SP=1 M56 (ADVANCE TAILSTOCK) M01 (****************************************) N25 (POSITION TAILSTOCK Z10.0) VCHSW=1 (ACTIVATE TAILSTOCK OPERATION MODE) VTSWP[3]=VZOFZ-.5 (TAILSTOCK POSITION) VTSAP[3]=VZOFZ+.7 (TAILSTOCK APPROACH) VTSRT[3]=VZOFZ+10. (RETRACT POSITION) G195 SP=3 M55 (TAILSTOCK POSITION) M01 M00 (****************************************) N26 (SEND TAILSTOCK HOME) VCHSW=1 (ACTIVATE TAILSTOCK OPERATION MODE) M847 (TAILSTOCK HOME) M01 M02

G13 (PROGRAMMED BY - [email protected]) (PROGRAM - O0402) (DATE - JAN.-25-16) (TIME - 10:53) (DRAWING NUMBER - 2KT113397SK1) (DRAWING REV - 0) (OPERATION - 2ND STRESS) (MACHINE - OKUMA LB4000II EXMY C2000) (ITEM NUMBER - SK1) (PROVEN BY - ) (****************************************) VCHSW=0 (TAILSTOCK OPERATION MODE OFF) (****************************************) P1 (SYNC A&B WORK OFFSETS) IF [VORD[0011] EQ 0] NPS1 (JUMP PAST THE ALARM) VUACM[1]='A INDIV ON!' VDOUT[992]=1 NPS1 (JUMP PAST ALARM) V1=VSZOZ (TRANSFER ZERO SET INTO VARIABLE 1) P3 P5 M01 (OP STOP & SYNC) (****************************************) DEF WORK PAINTT LF, LC, [-671,0], [51,51], [678,0] PAINTT LF, LC, [0,0], [0,0], [0,0], 0 END DRAW (****************************************) N1 P100 (ENGAGE TAILSTOCK) VCHSW=1 (ACTIVATE TAILSTOCK OPERATION MODE) VTSWP[1]=VSZOZ-.4 (TAILSTOCK POSITION) VTSAP[1]=VSZOZ+.7 (TAILSTOCK APPROACH) VTSRT[1]=VSZOZ+2.5 (TAILSTOCK RETRACT) G195 SP=1 M56 (ADVANCE TAILSTOCK) P101 M01 (****************************************) N2 P200 (RELEASE STEADY REST) P201 M00 (VISUAL CHECK) (****************************************) N3 P300 (FINISH 4.179 STEADY REST) M01 M103 (CHIP CONVEYOR ON) T11 (TOOL - 11 OFFSET - 11) G0 X100. Z1. M05 G50 S650 (OPERATION TYPE) VTLIN[11]=1

Below is an example of proper code for transforming a C-axis Contour toolpath. (no Y-axis). The text in blue is what I had to add. I have tried this with MPLFAN, & MPLMASTER, and i get the same results. The posts I have tested are for Fanuc and Okuma Controls. When I try to do this same thing using Y-axis, the output is perfect. (*****************************) N1(INTERPOLATE HOLES) M67 G28 U0. W0. H0. T0303(.75 SOLID CARBIDE EMILL W/.032 RAD.) M93 (CHIP CONVEYOR ON) G54 G98 M68 G0 C0. G0 Z2. X7. G97 S2500 M24 G12.1 G1 X7. C0. F500. Z.25 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. Z2. F500. (INTERPOLATE HOLES) G13.1 G0 C90. X7.0 Z.25 G12.1 G1 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. Z2. F500. (INTERPOLATE HOLES) G13.1 G0 C180. X7.0 Z.25 G12.1 G1 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. Z2. F500. (INTERPOLATE HOLES) G13.1 G0 C270. X7.0 Z.25 G12.1 G1 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. Z2. F500. G13.1 G28 U0. M05 M25 G28 W0. M95 (CHIP CONVEYOR OFF) M66 M30 % Below is what my post actually outputs. (no Y-axis). The text in red is where the post seems to reset C-axis to zero each time.(from what i gather in the debugger). (*****************************) N1(INTERPOLATE HOLES) M67 G28 U0. W0. H0. T0303(.75 SOLID CARBIDE EMILL W/.032 RAD.) M93 (CHIP CONVEYOR ON) G54 G98 M68 G0 C0. G0 Z2. X7. G97 S2500 M24 G12.1 G1 X7. C0. F500. Z.25 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. Z2. F500. (INTERPOLATE HOLES) F500. F500. Z.25 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. Z2. F500. (INTERPOLATE HOLES) F500. F500. Z.25 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. Z2. F500. (INTERPOLATE HOLES) F500. F500. Z.25 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. Z2. F500. G13.1 G28 U0. M05 M25 G28 W0. M95 (CHIP CONVEYOR OFF) M66 M30 % If i were to chain all 4 holes and not use Transform, the code would be correct like below. The problem is, I want my operator to be able to read the code, & this is much easier if the C-axis is rotated between each location and basically the same program is run again. Also this is just an extrememly simple example to be able to read the code easier. (*****************************) N1(INTERPOLATE HOLES) M67 G28 U0. W0. H0. T0303(.75 SOLID CARBIDE EMILL W/.032 RAD.) M93 (CHIP CONVEYOR ON) G54 G98 M68 G0 C0. G0 Z2. X7. G97 S2500 M24 G12.1 G1 X7. C0. F500. Z.25 Z0. F100. X7.375 F40. X7.75 G3 X6.25 Z-.05 R.375 X7.75 Z-.1 R.375 X6.25 Z-.15 R.375 X7.75 Z-.2 R.375 X6.25 Z-.25 R.375 X7.75 Z-.3 R.375 X6.25 Z-.35 R.375 X7.75 Z-.4 R.375 X6.25 Z-.45 R.375 X7.75 Z-.5 R.375 X6.25 Z-.55 R.375 X7.75 Z-.6 R.375 X6.25 Z-.65 R.375 X7.75 Z-.7 R.375 X6.25 Z-.75 R.375 X7.75 Z-.8 R.375 X6.25 Z-.85 R.375 X7.75 Z-.9 R.375 X6.25 Z-.95 R.375 X7.75 Z-1. R.375 X6.25 R.375 F4. X7.75 R.375 G1 X7. Z.25 F500. X0. C3.5 F500. Z0. F100. X.375 F40. X.75 G3 X-.75 Z-.05 R.375 X.75 Z-.1 R.375 X-.75 Z-.15 R.375 X.75 Z-.2 R.375 X-.75 Z-.25 R.375 X.75 Z-.3 R.375 X-.75 Z-.35 R.375 X.75 Z-.4 R.375 X-.75 Z-.45 R.375 X.75 Z-.5 R.375 X-.75 Z-.55 R.375 X.75 Z-.6 R.375 X-.75 Z-.65 R.375 X.75 Z-.7 R.375 X-.75 Z-.75 R.375 X.75 Z-.8 R.375 X-.75 Z-.85 R.375 X.75 Z-.9 R.375 X-.75 Z-.95 R.375 X.75 Z-1. R.375 X-.75 R.375 F4. X.75 R.375 G1 X0. Z.25 F500. X-7. C0. F500. Z0. F100. X-6.625 F40. X-6.25 G3 X-7.75 Z-.05 R.375 X-6.25 Z-.1 R.375 X-7.75 Z-.15 R.375 X-6.25 Z-.2 R.375 X-7.75 Z-.25 R.375 X-6.25 Z-.3 R.375 X-7.75 Z-.35 R.375 X-6.25 Z-.4 R.375 X-7.75 Z-.45 R.375 X-6.25 Z-.5 R.375 X-7.75 Z-.55 R.375 X-6.25 Z-.6 R.375 X-7.75 Z-.65 R.375 X-6.25 Z-.7 R.375 X-7.75 Z-.75 R.375 X-6.25 Z-.8 R.375 X-7.75 Z-.85 R.375 X-6.25 Z-.9 R.375 X-7.75 Z-.95 R.375 X-6.25 Z-1. R.375 X-7.75 R.375 F4. X-6.25 R.375 G1 X-7. Z.25 F500. X0. C-3.5 F500. Z0. F100. X.375 F40. X.75 G3 X-.75 Z-.05 R.375 X.75 Z-.1 R.375 X-.75 Z-.15 R.375 X.75 Z-.2 R.375 X-.75 Z-.25 R.375 X.75 Z-.3 R.375 X-.75 Z-.35 R.375 X.75 Z-.4 R.375 X-.75 Z-.45 R.375 X.75 Z-.5 R.375 X-.75 Z-.55 R.375 X.75 Z-.6 R.375 X-.75 Z-.65 R.375 X.75 Z-.7 R.375 X-.75 Z-.75 R.375 X.75 Z-.8 R.375 X-.75 Z-.85 R.375 X.75 Z-.9 R.375 X-.75 Z-.95 R.375 X.75 Z-1. R.375 X-.75 R.375 F4. X.75 R.375 G1 X0. Z.25 F500. Z2. F500. G13.1 G28 U0. M05 M25 G28 W0. M95 (CHIP CONVEYOR OFF) M66 M30 % 2 of my lathes here do not have Y-axis, and I do this type of operation almost daily. I have searched through this forum and have not seen anyone make mention of this issue. So I always thought that I was doing something wrong. Anybody else come across this?