HEIDENHAIN SW 68894x-02 - Manual (Page 535)

HEIDENHAIN CNC PILOT 640 535
8.2
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Roughing – Machining analysis
TURN PLUS uses the PLVA/PLVI parameters to define whether a
roughing area is to be rough-machined longitudinally or transversely.
Machining analysis
Transverse/longitudinal ratio – external [PLVA]
 PLVA <= AP/AL: Longitudinal machining
 PLVA > AP/AL: Transverse machining
Transverse/longitudinal ratio – internal [PLVI]
 PLVI <= IP/IL: Longitudinal machining
 PLVI >= IP/IL: Transverse machining
Minimum roughing transverse length [RMPL] (radius value)
Defines whether transverse roughing is used for the front
transverse element of the outside contour of a finish part.
 RMPL > l1: Without additional transverse roughing
 RMPL < l1: With additional transverse roughing
 RMPL = 0: Special case
Transverse angle variation [PWA]
The first front element is declared a transverse element when
it is within +PWA and –PWA.