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6 POSITIONING CONTROL
6.23.11 Home position return by the stopper type 2
(1) Stopper type 2
Position of stopper is home position in this method.
It travels the direction set in the "home position return direction" with the "creep
speed", and it presses against the stopper and makes to stop with the "creep
speed". (The torque limit value is valid set in the "torque limit value at the creep
speed" of the home position return data from the home position return start.)
Real position of servomotor at the time of detection for turning the torque limiting
signal OFF to ON is home position.
Torque limit value after reaching creep speed is set in the "torque limit value at
the creep speed" of home position return data.
(2) Home position return by the stopper type 2
Operation of home position return by the stopper type 2 is shown below.
Creep speed
Stopper
Real position of servomotor
at this point is home position.
Home position
return start
Torque limit
value
V
Torque limiting
signal
(M2416+20n)
Time which stops rotation of servomotors
forcibly by the stopper
(Note): "Travel value after proximity dog ON" storage register becomes "0" at the
home position return start.
t
Home position return data "torque limit value at the creep speed"
Home position
return direction
ON
OFF
Fig. 6.42 Home position return operation by the stopper type 2
(3) Home position return execution
Home position return by the stopper type 2 is executed using the servo program
in Section 6.23.16.
(4) Cautions
(a) A zero point does not must be passed (zero pass signal: M2406+20n ON)
between turning on the power supply and executing home position return.
(b) Home position return retry function cannot be used in the stopper type 2.