Specifications

App - 41
STROKE LIMIT
The range in which a positioning operation is
possible, or the range in which the machine can be
moved without damage occurring.
(Movement outside this range is possible in JOG.)
For operations using a worm gear, the stroke limi
t
is determined by the length of the screw. Fo
r
operations using a fixed-feed, it is determined b
y
the max. dimension to be cut.
The upper and lower limits are set in the
parameters, however a separate limit switch should
be established and an emergency stop circuit
outside the PLC should be installed.
0
Lower limit
Upper limit
3m (9.84feet)
Positioning possible in a 3m (9.84feet) range
Limit switch for
emergency stop
T
TEACHING
When the positioning address is uncertain, o
r
gauging is required, users may need to search fo
r
the positions by themselves. This function is used
in such case to teach the obtained position to the
machine.
For example, complex addresses, such as
addresses of a drawing, can be taught by tracing a
model, and the positioning operation can be
reproduced.
TORQUE CONTROL
With this function, a limit is established for the
resistance torque applied to a motor used fo
r
positioning. The power is turned OFF if torque
exceeding that value is applied to a motor.
When an excessive torque is applied to a motor, i
t
causes the current to suddenly increase. Due to
this, a motor may be burned or damaged b
y
stresses, causing the life of the motor to be
shortened.
With this function, the sudden increase in the
torque, which occurs at OPR, can be used as a
command to stop the motor.
TRACKING FUNCTION
With this function, positioning is carried out to a
moving target at relative speed by inputting the
movement amount from an external encoder and
adding it to the servo command value.
TURNTABLE
A table that rotates with power.
One rotation is 360° and this is divided into angles
suitable for the work.
The positioning control unit is "degree".
Rotated by the motor
30°
UNIT SETTING
Refers to setting a unit of the target address o
f
positioning, or of the movement amount.
By using the units of mm, inch, degree and pulse
appropriately, the initial value in the fixed
parameters becomes a pulse unit.
XY TABLE
A device that moves a table in the X (latitudinal)
and Y (longitudinal) directions so that positioning
can be carried out easily.
There are also commercially available XY tables.
Y table
Ball screw
X table
Base table
servo motor
X axis
servo motor
Y axis
U
X