《目次》 《索引》
TI 71M01D03-03
1st Edition : 2007.03.12-00
Software
Hardware
Z-pulse
CCW (or B)direction
Z_OUT±
CW (or A)direction
time
ON
OFF
Accurate edge
Inaccurate edge１％
time
ON
OFF
Accurate
edge
200μs min
time
5-1.3 Choose detection edge for Z-pulse
There are “accurate edge” and “inaccurate edge” for Z-pulse. Please make
sure to choose the accurate edge when setting PLC.
Z-pulse is output as shown below.
Set the accurate edge as home position. The accurate edge depends on rotating
or moving direction.
Direction A
Direction B
Direction A or B is for LINEARSERV.
○ Chattering of Z-pulse
In case motor moves slowly, it may happen to get wrong home position due to
chattering of inaccurate edge. Please make sure to detect accurate edge, not
striding across inaccurate edge.
○ Detection accuracy of home sensor output
If the home sensor is turned ON/OFF near the accurate edge, the home position
may be shifted by an amount equivalent to 1 pulse of the Z-pulse due to the
accuracy of the sensor.
ex) In case of homing to CCW direction (accurate edge=rising edge):
Home sensor
CCW direction
ON
OFF
Z-pulse
ON
OFF
The home position is mis-detected
because the inaccurate edge shows
the same rising edge as the
accurate edge due to chattering of
inaccurate edge.
Moving
direction
CCW direction
ON
OFF
Z-pulse
ON
OFF
The home position is shifted by an
amount equivalent to 1 pulse of
the Z-pulse because the position
at which home sensor is turned
ON/OFF is shifted.
Moving
direction
Home sensor
Notice
Notice
Falling edge
Rising edge
ON
OFF
Accurate
edge
Accurate
edge
Inaccurate
edge
Inaccurate
edge
Inaccurate edge１％
time
ON
OFF
Accurate
edge
200μs min
CW
direction
CCW
direction
5-2
