Cutting Data Calculator; Application - HEIDENHAIN TNC 620 User Manual

4
Programming: Programming Aids
4.6

Cutting data calculator

4.6 Cutting data calculator

Application

With the cutting data calculator you can calculate the spindle speed
and the feed rate for a machining 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 TOOL CALL
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
R:
VC:
S=
Window for feed rate calculation:
Code letter
S:
Z:
FZ:
FU:
F=
You can also calculate the feed rate in the TOOL
CALL block and automatically transfer it to the
subsequent positioning blocks and cycles. For
entering feed rates in positioning blocks or cycles,
select the F AUTO soft key. The TNC then uses the
feed rate defined in the TOOL CALL block. If you
have to change the feed rate later, you only need to
adjust the feed rate value in the TOOL CALL block.
154
Meaning
Tool radius (mm)
Cutting speed (m/min)
Result for spindle speed (rev/min)
Meaning
Spindle speed (rpm)
Number of teeth on the tool (n)
Feed per tooth (mm/tooth)
Feed rate per revolution (mm/1)
Result for feed rate (mm/min)
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015