HEIDENHAIN TNC 360 ISO Programming - Manual (Page 215)

TNC 360 11-16
11 Tables, Overviews, Diagrams
11.4 Diagrams for Machining
Depth of cut per tooth
d [mm]
Spindle speed
S [rpm]
Feed rate F
The feed rate F of the tool is calculated from the number of tool teeth n,
the permissible depth of cut per tooth d, and the spindle speed S:
F = n
. d . S
Units:
F in mm/min
d in mm
S in rpm
The feed rate read from the diagram must be multiplied by the number of
tool teeth.
Example:
Depth of cut per tooth
d = 0.1 mm
Spindle speed S = 500 rpm
Feed rate from diagram F = 50 mm/min
Number of tool teeth n = 6
Feed rate to enter F = 300 mm/min
The diagram provides approximate values and assumes the following:
• Downfeed in the tool axis = 0.5 . R and the tool is cutting through solid metal, or
• Lateral metal-to-air ratio = 0.25 . R and downfeed in the tool axis = R