Siemens SINUMERIK 840D Programming Manual page 140

3
Milling Cycles
3.5 Slots on a circle – SLOT1
VARI, MIDF, FFP2 and SSF (machining type,
infeed depth, feedrate and speed)
You can define the type of machining with parameter
VARI.
Possible values are:
UNITS DIGIT
• 0=Complete machining in two parts
- Machining of the slot (SLOT1, SLOT2) or
pocket (POCKET1, POCKET2) to the final
machining allowance is performed at the
spindle speed programmed before the cycle
was called and with feedrate FFP1. Depth
infeed is defined with MID.
- Removing stock for the remaining final
machining allowance takes place at the spindle
speed preset by SSF and feed FFP2. The depth
infeed takes place with vertical indeed via
MIDF. If MIDF=0, the infeed is equal to the final
depth.
If FFP2 is not programmed, feed FFP1 acts.
Similarly, if there is no message from SSF, i.e.
the speed programmed before cycle start is
active.
• 1=Roughing
The slot (SLOT1, SLOT2) or pocket (POCKET1,
POCKET2) is solid machined up to the final
machining allowance at the speed programmed
before the cycle call and feedrate FFP1. The depth
infeed is programmed in MID.
• 2=Finishing
The cycle requires that the slot (SLOT1, SLOT2)
or pocket (POCKET1, POCKET2) is already
machined to a remaining final machining
allowance and that it is only necessary to
machine the final machining allowance. If FFP2
and SSF are not programmed, the feedrate FFP1
or the speed programmed before the cycle call is
active. Depth infeed takes place with via MIDF
with paraxial infeed.
In machining mode VARI=30 the edge finishing
cut is performed at the last roughing depth.
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SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
3
12.97
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