ACU-RITE CSS I/O Users Manual - Manual (Page 16)

14 I Operating Instructions
I - 3 Contr
o
lling the Constant Surf
ace Speed (CSS)
I - 3 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.
„ The READY output (X103-12) is active when the readout has
recognized the CSS I/O hardware, is monitoring the inputs, and is
controlling the output relays. If the CSS I/O detects a
communications error with the readout, the READY relay will be de-
energized.
When the CSS status field is set to disabled, then no CSS functionality
is available. Eight (8) generic switching outputs are available for
useage. When STANDARD, or LIMITED is selected, then the
remaining setup options must be completed. Only 5 generic
switching outputs will be available for usage.
The CSS setting screen provides a choice between
STANDARD, LIMITED or DISABLED mode. This setting
should always be set to STANDARD mode.