
B–63172EN/01
26. SAFETY FUNCTIONS
NC FUNCTION
165
When the movable section has gone beyond the stroke end, a signal is
output, the axis decelerates to a stop, and overtravel alarm is displayed.
All directions on all axes has overtravel signals.
The movable section of the machine is parameter set in machine
coordinates value. If the machine moves beyond the preset range, it
decelerates to a stop and alarm is displayed. (This function is valid after
manual reference point return at power on.)
This function can be used instead of hardware overtravel limit switch.
When both is equipped with, both are valid.
Unlike overtravel detection, stored stroke check 1 checks whether the
distance between the current position and that at which the tool will be
stopped after deceleration exceeds the limit.
(X
1
, Y
1
, Z
1
, ...)
(X
2
, Y
2
, Z
2
, ...)
The shaded part is
the inhibition area.
When a new tool is mounted, position the tip of the tool on the two corners
of the limit area, and specify the machine coordinates of the corners in the
parameters for stroke limit 1. The machine coordinates are stored in the
CNC as the limit positions. Then input signals for setting the stroke limit.
Stroke limit setting signals are provided for each axis and each direction.
Checking of the stroke limit can also be selected by turning on or off the
limit release signal common to all axes.
26.2
OVERTRAVEL
FUNCTIONS
26.2.1
Overtravel
26.2.2
Stored Stroke Check 1
26.2.3
Externally Setting the
Stroke Limit