Spindle Speed (S), Direction Of Spindle Rotation (M3, M4, M5) - Siemens SINUMERIK 840DE Programming Manual

Feedrate Control and Spindle Motion

7.12 Spindle speed (S), direction of spindle rotation (M3, M4, M5)

Constant feedrate on contour with CFC
The feedrate is reduced for inside radii and increased for outside radii. This ensures a
constant speed at the tool edge and thus at the contour.
7.12 Spindle speed (S), direction of spindle rotation (M3, M4, M5)
Function
The functions described are used to
• switch the spindle on
• specify the required direction of spindle rotation, and
• define the counterspindle or an actuated tool as the master spindle, e.g., on turning
The following programming commands are valid for the master spindle: G95, G96/G961,
G97/G971, G33, G331 (see also Chapter "Main spindle, master spindle").
Machine manufacturer
Definition as master spindle is also possible via machine data (default).
Programming
M3 or M1=3
Or
M4 or M1=4
Or
M5 or M1=5
7-34
machines.
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals