
4.PARAMETER SETTING START-UP B-65222EN/03
- 166 -
In this state, activating phase data is output to No. 353 on the CNC
diagnosis screen. Note that display data = 256 on the diagnosis screen
corresponds to an activating phase of 360 degrees. The following
expression is used for output unit conversion to an activation phase
[degrees]:
Activating phase [degrees] = (Value of DGN No. 353) × 360/256
2) Turn off the power to the CNC and servo amplifier.
3) Detach the linear motor power line from the servo amplifier, then
connect the power line to the DC power supply.
Connect the + terminal of the DC power supply to phase U of the
power line, and connect the - terminal of the DC power supply to
phase V and phase W of the power line.
U
V
W
+
-
DC power
Coil slider
Fig. 4.1.1(e) Connection of DC power suppl
4) In the emergency stop state, turn on the power to the CNC and
servo amplifier.
5) Display No. 353 on the CNC diagnosis screen, and turn on the
power to the DC power supply. Next, increase the current
gradually (DC activation).
When the force of the linear motor produced by current supplied
from the DC power supply exceeds static friction, the linear
motor starts moving, and the linear motor automatically stops at
a position where activation phase = 0.
A position where activating phase = 0 is present at intervals of
60 mm with 1500A/4 or larger linear motors, or at intervals of 30
mm with 900D/4 or smaller linear motors.
WARNING
If a large current flows abruptly, the motor produces
a large force, resulting in a very dangerous situation.
When making this adjustment, be sure to increase
the current value gradually starting from current
value = 0 [A].
6) When the linear motor is at rest, read the value of No. 353 on the
CNC diagnosis screen. Turn off the power to the DC power
supply immediately after reading the value of No. 353.