Delta ASDA-B3 Series, Руководство пользователя

Страница: 236 / 815

ASDA-B3 Motion Control
7-17
7
4.
Referencing the falling edge of the ORG signal.
This method uses the falling-edge signal of the home sensor as the reference origin.
You can choose whether or not to use the Z pulse as the reference origin after the ORG
signal is detected.
Motor
Z pulse
Start point 1
Limit signal
(a) Reverse to Z
End
Start point 1
(b) Go forward to Z
End
(b) Do not look for Z
Start point 1
End
ORG signal
Limit
Start
point 3
Start
point 2
Start
point 2
Start
point 3
Start
point 3
Start
point 2
(a)
If you set the servo to to look for the Z pulse in the reverse direction, when the ORG
signal at the start point is un-triggered (low, Start point 1), the servo operates at high
speed (first speed setting) until reaching the rising edge of the ORG signal. Then it
decelerates and switches to low speed (second speed setting) until the ORG signal
switches to low. Next, the servo reverses to look for the Z pulse. When the servo finds
the Z pulse, it decelerates to a stop, completing the homing procedure.
If the ORG signal at the start point is un-triggered and the current position is relatively
closer to the limit switch (Start point 2), the servo operates at high speed (first speed
setting) until reaching the limit switch. You can set whether to show an error or reverse
the operating direction when it reaches the limit switch. If you set the servo to reverse
direction, it operates in reverse direction to reach the home sensor (ORG). Once
reaching the home sensor (ORG), the servo decelerates and operates at low speed
(second speed setting) in the forward direction to reach the falling edge of the ORG
signal. Next, the servo reverses to look for the Z pulse. When the servo finds the
Z pulse, it decelerates to a stop, completing the homing procedure.