HEIDENHAIN ND 780 - Handbuch (Seite 160)

36
I Operating Instructions
I - 2 Gener
a
l Oper
ations f
o
r ND 780
RPM Calculator
The RPM calculator is used to determine the RPM (or surface cutting
speed) based on a specified tool (part, for turning applications)
diameter. The values shown in this Figure are only an example.
Consult your tool manufacturer’s manual to verify spindle speed
ranges per tool.

Press CALC.

Press the RPM soft key to open the RPM Calculator form.
 The RMP calculator requires a tool diameter. Use the numeric hard
keys to enter a diameter value. The diameter value will default to the
current tool’s diameter. If there is no last value entered in this power
cycle, the default value is 0.
 If a surface speed value is required, enter the value using the
numeric hard keys. When a surface speed value is entered, the
associated RMP value will be calculated.
When in the Surface Speed field, a soft key is available for opening on-
line help. The table may be consulted for a recommended range of
surface speeds for the material being machined.
 Press the UNITS soft key to show the units as inch or millimeter.

The RPM Calculator form is closed by pressing the C key saving
current data.