HEIDENHAIN TNC 620 (81760x-02) ISO programming - Manual (Page 144)

Programming: Programming aids
4.6 Cutting data calculator
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TNC 620 | User's ManualDIN/ISO Programming | 2/2015
4.6 Cutting data calculator
Application
With the cutting data calculator you can calculate the spindle speed
and the feed rate for a machine process. Then you can load the
calculated values into an opened feed-rate or spindle-speed dialog
box in the NC program.
To open the cutting data calculator, press the
CUTTING DATA
CALCULATOR soft key. The TNC shows the soft key if you
open the calculator ( CALC key)
open the dialog field for spindle speed input in the T block
open the dialog field for feed rate input in positioning blocks or
cycles
enter a feed rate in manual operation (F soft key)
enter a spindle speed in manual operation (S soft key)
The cutting data calculator is displayed with different input fields
depending on whether you calculate a spindle speed or a feed rate:
Window or spindle speed calculation:
Code letter Meaning
R: Tool radius (mm)
VC: Cutting speed (m/min)
S= Result for spindle speed (rev/min)