Hitachi SJ-FB - Manual (Page 23)

23
Chapter 7 FUNCTIONS
A044: 1 st Control Method
P014: Orientation Stop Position
P015: Orientation Speed setting
P016: Orientation Direction setting
P017: Completion range setting
P018: Completion delay time
P023: Position loop gain
C001-C008: Intelligent input terminal
C021-C025: Intelligent output terminal
Relation
7.1 Orientation function
This board is provided with the orientation function used to
position the motor at a certain point during operation. This
function can be used for replacing a component of the main axis
of the subject machine tool for example.
7.1.1 Function outline
The orientation function maintains position which has decided
with the position control after speed control operation. The action
is shown in Figure 7-1.
1. In the speed control operation period, inverter drives at constant speed with the orientation
speed setting (P015). (Orientation mode becomes valid when turning RUN command ON
under ORT is being ON.)
2. After arriving to the orientation speed setting(P015), the first coming the Z pulse is detected
after that the control mode moves to the position control.
3. Inverter controls the motor to stop at a certain stop position which is set to (P014) during
position control operation period.
(Note 1) Rotation speed of the motor is zero but inverter is outputting to the motor.
Don't touch the motor power line. Otherwise, there is a danger of electric shock and/or injury.
Figure 7 - 1(1) Orientation and timing
(Action timing of when the ORT input signal is OFF during the orientation )
(Note 2) In case of reoperating when the operation command is set terminal.
Set the command operation(FW,REV)again.
(1) (2)
(3)
(4)
(5)
Speed control Position control
Operation command
(FW/RV)
ORT terminal
Rotation Speed
of Motor
Z pulse
POK signal output
(Positioning completion)
Output motor
Acceleration rate
follow acceleration
time setting F002
Deceleration time doesn't follow
deceleration time setting F003.
If the loop back gain (P023) is
big, deceleration time is short
In the case of exceeding
the required stop position
Output zero
servo
(Note 1)
Completion delay time setting (P018)