HEIDENHAIN iTNC 530 (34049x-08) Cycle programming - Manual (Page 210)

210 Fixed cycles: contour pocket, contour trains
7.
11
TR
OCHOID
AL SL
O
T
(Cy
cle 275, DIN/ISO:
G275)
Roughing with closed slots
The contour description of a closed slot must always start with a
straight-line block (L block).
1
Following the positioning logic, the tool moves to the starting point
of the contour description and moves in a reciprocating motion at
the plunging angle defined in the tool table to the first infeed
depth. Specify the plunging strategy with Parameter Q366.
2 The TNC roughs the slot in circular motions to the contour end
point. During the circular motion the TNC moves the tool in
machining direction by an infeed you can define (Q436). Define
climb or up-cut of the circular motion in Parameter Q351.
3 At the contour end point, the TNC moves the tool to clearance
height and returns to the starting point of the contour description.
4 This process is repeated until the programmed slot depth is
reached.
Finishing with closed slots
5 Inasmuch as a finishing allowance is defined, the TNC finishes the
slot walls, in multiple infeeds if so specified. Starting from the
defined starting point, the TNC approaches the slot wall
tangentially. Climb or up-cut are taken into consideration.
Roughing with open slots
The contour description of an open slot must always start with an
approach block (APPR).
1
Following the positioning logic, the tool moves to the starting point
of the machining operation as defined by the parameters in the
APPR
block and positions there perpendicular to the first plunging
depth.
2 The TNC roughs the slot in circular motions to the contour end
point. During the circular motion the TNC moves the tool in
machining direction by an infeed you can define (Q436). Define
climb or up-cut of the circular motion in Parameter Q351.
3 At the contour end point, the TNC moves the tool to clearance
height and returns to the starting point of the contour description.
4 This process is repeated until the programmed slot depth is
reached.
Finishing with closed slots
5 Inasmuch as a finishing allowance is defined, the TNC finishes the
slot walls, in multiple infeeds if so specified. Starting from the
defined starting point of the APPR block, the TNC approaches the
slot wall. Climb or up-cut are taken into consideration.