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BCN-B11127-479*
5.5 Zeroing
5.5.1 Stopper type zeroing
In stopper type zeroing, a machine part is pressed against a stopper or the like by jog operation, manual
pulse generator operation or the like to make a home position return and that position is defined as a
home position.
(1) Signals, parameters
Set the input signals and parameters as follows:
Item Device/Parameter
Used
Description
Automatic/manual selection signal (MDO)
Short MDO-SG (ON).
Point table No. selection 1 (DI0)
Open DI0-SG (OFF).
Manual zeroing mode
selection
Point table No. selection 2 (DI1)
Open DI1-SG (OFF).
Stopper type zeroing
Parameter No.8
3 : Stopper type zeroing is selected.
Zeroing direction
Parameter No.8
Refer to the parameter No.8
Zeroing speed
Parameter No.9
Set the speed till contact with the stopper.
Zeroing position data
Parameter No.42
Used to set the current position on completion
of zeroing
Stopper time
Parameter No.44
Time from when the part makes contact with
the stopper to when zeroing data is obtained to
output zeroing completion (ZP)
Stopper type zeroing torque
limit
Parameter No.45
Set the servo motor torque limit value for
execution of stopper type zeroing.
Zeroing acceleration time
constant
Point table No.1
Use the acceleration time constant of point
table No.1.
(2) Timing chart
In position (INP)
Rough match
(CPO)
Zeroing
completion (ZP)
Servo motor speed
Forward rotation
start (ST1)
Reverse rotation
start (ST2)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
5ms or less
Zero address
Parameter No. 42
ON
OFF
Automatic/manual
mode selection
(MDO)
10ms or more
Limiting
torque (TLC)
ON
OFF
Torque limit value
Stopper
Parameter No. 28
Parameter No. 45
Parameter No. 28
Stopper time
Parameter No. 44
Point table No.1
Acceleration time constant
Zeroing speed
Parameter No.9
The address on completion of zeroing is the value automatically set in parameter No.42 (zeroing
position data).
Parameter No.14 (STC) will be disabled during zeroing.
