HEIDENHAIN IOB 49 - Manual (Page 10)

10 I Operating Instructions
I – 2 Contr
o
lling the Constant Surf
ace Speed (CSS)
I – 2 Controlling the Constant
Surface Speed (CSS)
In CSS mode, a constant surface cutting speed can be maintained on
a lathe. The following functions are available:
„ CSS mode: The DAC output signal provides constant surface speed
by adjusting the spindle speed as the diameter (radius) of the
workpiece changes.
„ Direct entry of spindle speed: The DAC output signal sets the
spindle speed based on the value entered via the numeric keypad.
„ Speed limits: The user may set a safe operating range (minimum
and maximum speeds) for spindle speed.
„ Gear selection: Three different gears can be specified for varying the
relation between the actual speed and the DAC output signal.