Sequence Of Motions For Finishing (_Vari=2) - Siemens SINUMERIK 840D Programming Manual

03.96
04.00
3
Depth infeed:
• Infeed to safety clearance
• Insertion to machining depth
The first machining depth is the product of:
• the total depth,
• the final machining allowance and
• the maximum possible depth infeed.

Sequence of motions for finishing (_VARI=2)

Depending on the setting of parameters _FAL and
_FALD, a finishing operation is performed on the spigot
surface or base or both. The approach strategy
matches the motions in the plane executed for roughing
operations.
Description of parameters
See Section 2.1.2. (Drilling, Centering – CYCLE81)
for a description of parameters RTP, RFP, SDIS,
DP, DPR.
See Section 3.9 for a description of parameters
_MID, _FAL, _FALD, _FFP1, _FFD.
_PRAD (diameter of spigot)
The diameter must be entered without a sign.
_PA, _PO (spigot center point)
With parameters _PA and _PO you define the
reference point of the spigot.
Circular spigots are always measured from the center.
_CDIR (milling direction)
The machining direction of the spigot is defined in this
parameter.
Under parameter _CDIR the mill direction
• direct "2 for G2" and "3 for G3" or
• alternatively "climb milling" or "opposed milling"
can be programmed. Climb milling or opposed
milling is determined within the cycle via the spindle
direction activated prior to the cycle call.
Climb
M3 → G3
M4 → G2
 Siemens AG 2000 All rights reserved.
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
3.14 Milling circular spigots - CYCLE77 (SW 5.3 and later)
Opposed
M3 → G2
M4 → G3
Milling Cycles
3
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