Input Signals Required For Origin Search; Origin Search Methods And Parameters - Omron CS1W-MCH71 MOTION CONTROL UNIT - 09-2004 Manual

Input Signals Required for Origin search

8-2 Input Signals Required for Origin search
CW/CCW Limit Signals
Origin Proximity Signal
Encoder Phase-Z Signal
External Input signal 1,2,
and 3
8-3

Origin Search Methods and Parameters

8-3-1 Origin Search Methods
Origin at Power ON Mode
Limit Reversal Mode
2-level Speed in One
Direction Mode
492
The following input signals and conditions are required to perform the origin
search operation.
Parameter
CW/CCW Limit Signals
Origin Proximity Signal
Encoder Phase-Z Signal
External Input Signal 1,2,
and 3
These signal inputs indicate the maximum operating range of the work when
the motor rotates in the direction of clockwise (CW) or counterclockwise
(CCW).
This signal input indicates that the axis is near the origin.
This signal will be output when the encoder makes one revolution.
The first phase-Z input position after the origin proximity signal input changes
from ON to OFF becomes the actual machine origin.
Instead of encoder phase-Z signal, one of these signals determines the actual
machine origin. The signal to be used can be selected in the system parame-
ter [P4AA06: Origin determine signal].
There are four possible settings for the origin search methods.
• The position of the motor when the power is turned ON is defined as the
origin automatically.
• If an origin search is performed in this mode, the position where the origin
search is started will become the origin.
• The direction will be reversed if a limit input signal is input during the ori-
gin search.
• After starting the operation towards Origin search start direction at Origin
search feed rate, when Origin proximity signal input (normally open) is
turned ON, the speed will be changed to Origin search approach speed.
At the rise of Origin determine signal input after the Origin proximity signal
input has been turned OFF, the speed is changed to Origin search creep
speed. The axis travels for the final travel distance to define an origin.
• When there is no Origin proximity signal input, a limit signal input can be
used instead.
• The origin search is performed only in one direction.
• After starting the operation towards the phase-Z detection direction at Ori-
gin search approach speed, the speed will be changed to Origin search
creep speed at the rise of the Origin determine signal input and the axis
travels for the final travel distance to define an origin. An alarm will occur if
a limit signal input is received before the origin proximity signal input.
Description
Normally closed switches are required.
The logic of the input signal can be changed in the
parameter, so either Normally closed or Normally open
switch can be used.
Built-in signal of the encoder on the servomotor.
Normally open switches are used, and connected to the
servo driver.
Section 8-2