The Third Axis; Spindle Movements; Spindle Speed S, Directions Of Rotation - Siemens SINUMERIK User Manual

Remark
G4 S.. is only possible if a controlled spindle is available (if the speed specifications are also programmed via S...).
11.8

The third axis

Prerequisite
The control system itself must be designed for three axes.
Functionality
Depending on the machine design, the third axis can be required. These axes can be implemented as linear or rotary axes.
The identifier for these axes is defined by the machine manufacturer (e.g. C).
For rotary axes, the traversing range can be configured between 0 ...<360 degrees (modulo behavior) or -360 degrees/+360
degrees if there is no modulo axis is present.
With an appropriate machine design, a 3rd axis can be traversed linear simultaneously with the remaining axes. If the axis is
traversed in a block with G1 or G2/G3 with the remaining axes (X, Z), it does not receive a component of the feedrate F. Its
speed conforms to the path time of axes X, Z. Its movement begins and ends with the remaining path axes. However, the
speed cannot exceed the defined limit value.
If a block is programmed with this 3rd axis only, the axis will traverse using the active feedrate F when the G1 function is
executed. If the axis is a rotary axis, the unit of measurement for F is degrees/min with G94 or degrees/rev. of the spindle
with G95.
For these axes, offsets can be set (G54 ... G59) and programmed (TRANS, ATRANS).
Programming example
The 3rd axis is a rotary axis with the axis identifier C
N5 G94
N10 G0 X10 Z30 C45
N20 G1 X12 Z33 C60 F400
N30 G1 C90 F3000
Special instructions for rotary axes: DC, ACP, ACN
For example, for rotary axis A:
A=DC(...)
A=ACP(...)
A=ACN(...)
Example:
N10 A=ACP(55.7)
11.9

Spindle movements

11.9.1

Spindle speed S, directions of rotation

Functionality
The spindle speed is programmed under the address S in revolutions per minute, if the machine has a controlled spindle.
The direction of rotation and the beginning or end of the movement are specified via M commands.
Programming
M3
M4
M5
Remark: For integer S values, the decimal point can be omitted, e.g. S270.
Programming and Operating Manual (Turning)
01/2017
; feedrate F in mm/min or degrees/min
; X-Z traverse path with rapid traverse, C at the same time
; X-Z traverse path at 400 mm/min, C at the same time
; Axis C traverses alone to position 90 degrees at a speed of 3000
degrees/min
; Absolute dimensions, approach position directly (on the shortest
path)
; Absolute dimensions, approach position in positive direction
; Absolute dimensions, approach position in negative direction
; approach absolute position 55.7 degrees in positive direction
; Spindle clockwise
; Spindle counter-clockwise
; Spindle stop
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