4 The outline of motor control
17
4-5 Home Position Set and Search drive
Home position of the unit is set by home position search drive. If the sensor of the origin
point (H.P switch) is detected, motor will stop automatically and the moving direction and
the origin point at the time of detection are memorized on a main unit.
At the beginning
A setup of H.P can be set up by connecting with H.P LS switch of LS connector and
detecting the origin point sensor arranged at the mechanical origin point.
To set H.P, you need to decide the direction of detecting origin point.
In the case of the following figure, detect way is CW.
Once detect the origin point, motor stopped automatically and memorize the direction
and H.P pulse data. In this case, motor speed must be low within response time of sensor.
You need to check the set speed.
Selection of detecting ways
There are three ways of detecting origin point.
Some are in case of memorized data had existed and another is in case of no memorized
data.
[METHOD A]
METHOD
ORIGINAL
STATE
DETECT WAY
PROCEDURES
ACCURACY
TIME
A
NO
MEMORIZED
DATA
MANUAL
Manual operation
JOG CW, CCW or
START
+
JOG
CW,CCW
AVERAGE
SHORT
B
NO
MEMORIZED
DATA
SEMI
AUTOMATICAL
Hold “START” switch
more than 1 sec.
GREAT
LONG
C
EXISTED
MEMORIZED
DATA
SEMI
AUTOMATICAL
Push “START” switch.
GREAT
SHORT
CW
CCW
origin sensor (H.P LS)
CW
CCW
origin sensor (H.P LS)
mechanical cam for detect origin point
mechanical cam for detect origin point
