HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 302)

302 DIN Programming
4.1
9
Thr
ead cy
cles
6: Constant infeed with remaining cutting (4290)
The control uses the same cutting depth for each infeed; the
cutting depth corresponds to the maximum infeed I. If the thread
depth is not a multiple of the cutting depth, the control uses the
depth of the remaining cut 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.