Css Operating Mode - HEIDENHAIN IOB 49 User Manual

CSS operating mode

The operating parameters are set in the CSS / DIRECT RPM form.
Press the CSS SETUP soft key to open the form or select the
parameter from the JOB SETUP menu.
 The SETTINGS field is used to select the mode of operation and the
control settings. The spindle is controlled by selecting CSS or by
entering the spindle speed directly. The values to be entered
depend on the selected option.
If CSS was selected to maintain a constant surface speed, the surface
speed entered with the numeric keys is maintained. As the diameter
of the part changes, the spindle speed will be adjusted.
To set a specific spindle speed, select DIRECT / RPM and enter the
value with the numeric keypad.
If the position display of the third axis is configured to be used for the
spindle speed, the rpm in the SETTING field can be set to the current
spindle speed by pressing the TEACH soft key.
Select OFF when spindle control is not needed.
 The GEAR SELECTION field is used to manually enter the operating
gear with the numeric keypad.
If the gear control parameter in INSTALLATION SETUP is
set to EXTERNAL, the field will show the current gear
selection based on the external inputs. The field can then
not be selected and is skipped.
 The LIMITS field is used to establish the minimum and maximum
limits of the controlled spindle speed. When operating in the CSS or
DIRECT RPM modes, the DAC output will not be set to a speed
above or below these limits.
If the position display of the third axis is configured to be used for the
spindle speed, the rpm in the SETTING field can be set to the current
spindle speed by pressing the TEACH soft key.
Press ENTER to save the parameters and exit the input form. Press
the C key to exit without saving the changes you made.
The settings will be lost when the ND 780 is switched off.
12
Fig. I.8 Form in which the speed limits are defined
I Operating Instructions