NC Plot time cycle lathe wrong, answer

[duenow]

I found out why a 35 sec job will read 35 seconds (That's correct).
Other jobs about the same sec will read 2 min 45 seconds.

The difference is jobs that thd with the G76 cycle will show 3 or more
times the actual time.

Been wondering why some the time is right & some it's way to much.

[MetLHead]

I can't think of a reason that this would make a difference, but I'll check it out.

Thanks,
Scott

[duenow]

Originally Posted by MetLHead I can't think of a reason that this would make a difference, but I'll check it out. Thanks, Scott

Well I cut out the thd cycle & it's still 23M:29S. With thd cycle in it says
25M:29S
Actual time is 38 seconds. Not all my lathe programs do this about 2/3 are
the right cycle time, the other end of this part is right 23S. I just can't see why.

&HE:%
:0458(BEN-SHAFT-M10)
G20
G65P9150H1.(SET-FOR-50-90-PS1)
(BEN-BENT-SHAFT-M10)
(P/N-SHAFTBENTM10-JOB->O458)
N3(-TURN-&-FACE-T0303)
(PUT-TOOL-NOSE-RADIUS-IN-GEO-FILE)
G97M13S2500
M98P1
T0303
G99
G00X.6Z.200
Z0.080
G01X-0.060F0.006
G00X0.600
Z0.040
G01X-.060F.006
G00X.600Z.055
Z0.
G99G01X-.06F.006
G00X.04Z.100
G01G42X-.06Z0.F.010
G01X0.3110F.0060
G01X0.3910Z-0.0400F.0075
G01Z-1.0000
G01X0.470
G01X0.5000Z-1.0150F.004
G01Z-1.1000X.510
G00X.600
M98P2
N5(-THD-OD-CUT-T0500)
G97M13S2000
M98P1
T0505
X0.515Z0.375
/G76P010055Q0015R.0004
(P=SPRING-PASSES.P--=PULL-OFF-DIS.P----=COMP-ANGLE)
(Q=MIN-PASS-DEPTH.R=FINISH-PASS-AMOUNT)
/G76X0.3185Z-1.018P0362Q0128R-.0F0.059067
(X=ROOT-DIA-Z=LENGTH-P=SINGLEDEPTH-Q=1STPASSDEPTH-R=TAPER)
M05
M98P2
/M21
G00Z8.
M30
%

[duenow]

I did find one thing, the other end says Average Feed Rate 28.9098
& it is correct at 38 seconds.
the above says 0.2831, seems most all the programs that the cycle time is right have Average Feed Rates of 26.... to 29....
All those that come out way to long have a verysmall number in the AFR.

I run these jobs all the time so I know the run fine. this is weird.