SMC Networks LECSB2-T Series User Manual

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16. POSITIONING MODE
16.12.8 Dog type rear end reference home position return
POINT
This home position return method depends on the timing of reading DOG
(Proximity dog) that has detected the rear end of a proximity dog. Therefore,
when a home position return is performed at a creep speed of 100 r/min, the
home position has an error of 6400 pulses. The higher the creep speed, the
greater the error of the home position.
Deceleration starts at the front end of a proximity dog. After the rear end is passed, the position is shifted by
the travel distance after proximity dog and the home position shift distance. The position after the shifts is
used as the home position. The home position return is available independently of the Z-phase signal.
(1) Device/parameter
Set input devices and parameters as shown below.
Item
Used device/parameter
Setting
Automatic operation mode of
the program method
MD0 (Operation mode selection 1)
Switch on MD0.
Dog type rear end reference
home position return
[Pr. PT04]
_ _ _ 5: Select the dog type (rear end
detection/rear end reference).
Home position return
direction
[Pr. PT04]
Refer to (2) of section 5.4.1 to select the home
position return direction.
Dog input polarity
[Pr. PT29]
Refer to (2) of section 5.4.1 to select the dog input
polarity.
Home position return speed
[Pr. PT05]
Set the rotation speed specified until a dog is
detected.
Creep speed
[Pr. PT06]
Set the rotation speed specified after a dog is
detected.
Home position shift distance
[Pr. PT07]
Set this item to shift the home position, which is
specified after the rear end of a proximity dog is
passed.
Travel distance after
proximity dog
[Pr. PT09]
Set the travel distance specified after the rear end
of a proximity dog is passed.
Home position return
acceleration time constant
[Pr. PC30]
The acceleration time constant set for [Pr. PC30]
is used.
Home position return
deceleration time constant
[Pr. PC31]
The deceleration time constant set for [Pr. PC31]
is used.
Home position return position
data
[Pr. PT08]
Set the current position at the home position return
completion.
Program
DI0 (Program No. selection 1) to
DI7 (Program No. selection 8)
Select a program containing a "ZRT" command,
which performs the home position return.

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English