Rpm Calculator - HEIDENHAIN ND 780 Handbuch

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.
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I Operating Instructions