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Orientation (Pr. 350 to Pr. 362, Pr. 393 to Pr. 399)
PARAMETERS
3
(3) Orientation from the reverse rotation direction
If the motor is running in the reverse rotation direction, it will orientation stop
with the same method as
"orientation from the current rotation direction".
If the motor is running in forward, it will decelerate, the rotation direction will
be changed to reverse run, and then orientation stop will be executed.
CAUTION
1. The encoder should be coupled with the motor shaft or the spindle oriented with a speed ratio of 1 to
1 without any mechanical looseness.
2. To ensure correct positioning, the encoder must be set in the proper rotation direction and the A and
B phases connected correctly.
3. The orientation may not be completed if the pulse signals are not received from the encoder during
orientation due to a break in the cable or the like.
4. To terminate orientation, the start signal (STF or STR) must be first switched off and the orientation
signal (X22) must be switched off. As soon as this orientation signal is switched off, orientation
control ends.
5. For orientation control, set correct values in Pr. 350 "stop position command selection" and Pr. 360
"external position command selection"
If the values set are incorrect, proper orientation control will not be performed.
6. When orientation control is exercised, PID control is invalid.
REMARKS
If "E.ECT" (no encoder signal) is displayed causing the inverter to trip when the orient signal (X22) is ON, check for the
encoder signal loss of the Z phase of the encoder.
z Pr. 357 "orientation in-position zone"
(factory setting:11)
• The positioning width for orientation stop can be
set.
The factory setting of Pr. 357 is "11". To change
the
Δθ value, finely adjust with ±10 increments,
and make fine adjustment.
• If the position detection value from the encoder
enters ±
Δθ during orientation stop, the orientation
complete signal (ORA) will be output.
Example of operation
CAUTION
This setting is used to judge the ON/OFF of the orientation complete signal, and does not determine the
orientation stop precision.
Speed
(forward)
X22
ORA
[t]
Speed
(reverse)
X22
ORA
[t]
Set point
Δθ Δθ
Δθ
=
Pr. 851 number of encoder pulses × 4
360°
× Pr. 357