Rd Or 4Th Axis - Siemens sinumerik 802d sl Operation And Programming Manual

Programming
8.3 Axis movements
8.3.15

3rd or 4th axis

Functionality
Depending on the machine design, a 3rd and even a 4th can be required. This axis can be
designed either as a linear or as a rotary axis (e.g. rotary axis for the tool magazine). The
names for these axes are specified by the machine manufacturer (e.g. U, C or A).
For rotary axes, the traversing range can be configured between 0 ...<360 degrees (modulo
behavior).
With an appropriate machine design, the 4th axis can be traversed linear simultaneously
with the remaining axes. If the axis is traversed together with the remaining axes (X, Y) in a
block that contains G1 or G2/G3, no component of the feedrate F is assigned to this axis; its
velocity will depend on the time for traveling along the X and Y axes, and its motion starts
and ends with the remaining path axes. The velocity, however, cannot be greater than the
defined limit value.
When traversed separately with G1 in the block, the axis will traverse with the activate fee-
drate F. If it is a rotary axis, the unit for F will be correspondingly degrees/min with G94 or
degrees/revolution of the spindle with G95.
For these axes, offsets can be set (G54 ... G59) and programmed (TRANS, ATRANS).
Programming example
Supposed the 4th axis is a rotary axis and the name of the axis is A:
N5 G94
N10 G0 X10 Z30 A45
N20 G1 X12 Z33 A60 F400
N30 G1 A90 F3000
Special instructions for rotary axes: DC, ACP, ACN
e.g. for rotary axis A:
A=DC(...)
A=ACP(...)
A=ACN(...)
Example:
N10 A=ACP(55.7)
direction
8.3.16 Dwell time: G4
Functionality
You can interrupt the machining for a defined time between two NC blocks by inserting a
separate block with G4, e.g. backing off.
The words with F... or S... are for the time specifications in this block only. Any feedrate F
programmed beforehand is maintained.
8-168
; F in mm/min or degrees/min
; Traverse X-Z path at rapid traverse, and A at the same time
; Traverse X-Z path with 400 mm/min, A at the same time
; A axis traverses to 90 deg. position at a
velocity of 3,000 deg./min
; Abs. dimensioning; approach position directly (on the shortest path)
; Absolute dimensioning; approach position in the positive direction
; Absolute dimensioning; approach position in the negative direction
; Absolute position 55.7 degrees; approach position in the positive
SINUMERIK 802D sl Operation and Programming Nibbling (BP-N), 06/2006 Edition
6FC5 398-3CP10-0BA0