Siemens SINUMERIK 808D User Manual page 214

C D IR (milling direction)
Use this parameter to specify the machining direction for the groove. Possible values are:
● "2" for G2
● "3" for G3
If the parameter is set to an illegal value, then the message "Wrong milling direction, G3 will be generated" will be displayed
in the message line. In this case, the cycle is continued and G3 is automatically generated.
FAL (finishing allowance)
Use this parameter to program a finishing allowance at the slot edge. FAL does not influence the depth infeed.
If the value of FAL is greater than allowed for the specified width and the milling cutter used, FAL is automatically reduced to
the maximum possible value. In the case of roughing, milling is performed with a reciprocating movement and depth infeed
at both end points of the slot.
VAR I, MIDF, FFP2 and SSF (machining type, infeed depth, feedrate and speed)
Use the parameter VARI to define the machining type.
Possible values are:
● 0=complete machining in two parts
– Solid machining of the slot (SLOT1, SLOT2) to the finishing allowance is performed at the spindle speed programmed
before the cycle was called and with feedrate FFP1. Depth infeed is defined with MID.
– Solid machining of the remaining finishing allowance is carried out at the spindle speed defined via SSF and the
feedrate FFP2. Depth infeed is defined with MIDF.
If MIDF=0, the infeed is performed right to the final depth.
– If FFP2 is not programmed, feedrate FFP1 is active. This also applies analogously if SSF is not specified, i.e. the
speed programmed prior to the cycle call will apply.
● 1=Roughing
The groove (SLOT1, SLOT2) is solid-machined up to the finishing allowance at the speed programmed before the cycle
call and at the feedrate FFP1. The depth infeed is programmed via MID.
● 2=Finishing
The cycle requires that the slot (SLOT1, SLOT2) is already machined to a residual finishing allowance and that it is only
necessary to machine the final finishing allowance. If FFP2 and SSF are not programmed, the feedrate FFP1 or the
speed programmed before the cycle call is active. Depth infeed is defined with MIDF.
If a different value is programmed for the parameter VARI, the cycle is aborted after output of alarm 61102 "Machining type
defined incorrectly".
FAL D (finishing allowance at slot edge)
When roughing, a separate finishing allowance is taken into account at the base.
D P1
Use the parameter DP1 to define the infeed depth when inserting to the helical path.
STA2 (insertion angle)
Use the STA2 parameter to define the radius of the helical path (relative to the tool center point path) or the maximum
insertion angle for the reciprocating motion.
● Vertical insertion
The vertical depth infeed always takes place at the same position in the machining plane as long as the slot is reached
by the end depth.
● Insertion oscillation on center axis of slot
It means that the milling center point on a straight line oscillating back and forth is inserted at an angle until it has
reached the nearest current depth. The maximum insertion angle is programmed under STA2, and the length of the
oscillation path is calculated from LENG-WID. The oscillating depth infeed ends at the same point as with vertical depth
infeed motions; the starting point in the plane is calculated accordingly. The roughing operation begins in the plane once
the current depth is reached. The feedrate is programmed under FFD.
214
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017