HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 595)

HEIDENHAIN CNC PILOT 4290 595
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Finishing – Machining standards
Finishing – Tool tolerances
For tool selection, the following applies:
„ Tool angle (EW): EW >= mkw
(mkw: ascending contour angle)
„ Tool angle (EW) and point angle (SW):
NWmin < (EW+SW) < NWmax
„ Adjacent angle (FNWT): FNWT = NWmax – NWmin
Machining standards
„ Standard/Full-surface – external/longitudinal [FAL]
„ Standard/Full-surface – internal/longitudinal [FIL]
„ Standard/Full-surface – external/transverse [FAP]
„ Standard/Full-surface – internal/transverse [FIP]
Machining of contour areas:
„ 0 – Full-surface finishing cycle: TURN PLUS looks for an
optimum tool for machining the complete contour area.
„ 1 – Standard finishing cycle:
„ The machining operation is primarily executed with
standard finishing tools. Relief turns and undercuts are
machined with a suitable tool.
„ If the standard finishing tool cannot be used for relief turns
and undercuts, TURN PLUS splits up the machining
operation into standard machining operations and
machining the form elements.
„ If a division into standard machining and form-element
machining is not possible, TURN PLUS switches to “full-
surface machining”.
Tool tolerances
Adjacent angle tolerance [FNWT]
Tolerance range for secondary cutting edge
Relief cutting angle [FFW]
Minimum angle differential between the contour and
secondary cutting edge