Parameter V: Type Of Infeed - HEIDENHAIN CNC PILOT 640 User Manual

4

Parameter V: Type of infeed

With the V parameter you define the type of infeed for thread cutting
cycles.
The following infeed types are available:
0: Const. mach. X-section – the control reduces the cutting
depth with each infeed so that the chip cross section and
therefore the removal rate remain constant
1: Const. infeed – with each infeed the control uses the same
cutting depth without exceeding the Max. approach I
2: EPL with distrib. of cuts – the control calculates the cutting
depth for constant infeed from the Thread pitch F1 and Shaft
speed constant S. If the multiple of the cutting depth does not
correspond to the Thread depth, the control uses the Rem. cut
depth for the first infeed. With the "distribution of remaining cuts,"
the control divides the last cutting depth into four partial cuts.
The first cut is half the calculated cutting depth, the second is a
quarter and the third and fourth each are an eighth
3: EPL w/o distrib. of cuts – the control calculates the cutting
depth for constant infeed from the Thread pitch F1 and constant
shaft speed S. If the multiple of the cutting depth does not
correspond to the Thread depth, the control uses the Rem. cut
depth for the first infeed. All subsequent infeeds are constant and
correspond to the calculated cutting depth
4: MANUALplus 4110 – the control executes the first infeed
with the Max. approach I. To determine the subsequent cutting
depths, the control uses the formula
no. of cuts, where
depth is reduced with each infeed due to the current number of
cuts increasing by the value
cut depth R is fallen below, the control uses the value defined
in this as the new constant cutting depth. If the multiple of the
cutting depth does not correspond to the Thread depth, the
control executes the last cut at the final depth
5: Constant infeed (4290) – with each infeed the control uses
the same cutting depth where the cutting depth corresponds to
the Max. approach I. If the multiple of the cutting depth does not
correspond to the Thread depth, the control uses the remaining
cutting depth for the first infeed.
6: Const. w/ distrib. (4290) – with each infeed the control uses
the same cutting depth, where the cutting depth corresponds to
the Max. approach I. If the multiple of the cutting depth does not
correspond to the Thread depth, the control uses the Rem. cut
depth for the first infeed. With the "distribution of remaining cuts,"
the control divides the last cutting depth into four partial cuts.
The first cut is half the calculated cutting depth, the second is a
quarter and the third and fourth each are an eighth
346
gt = 2 * I * SQRT
gt is the absolute depth. Because the cutting
with each infeed, and if the Rem.
1
DIN/ISO programming | Thread cycles
current
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017