Home Position Return Operation - Mitsubishi FX-1PG User Manual

FX-1PG/FX
6
6.1.4

Home Position Return Operation

< Home position return operation >
The home position return operation varies depending on
the start position.
*2
Limit switch
for limit
detection
$
➀ The near point signal is turned off (before the DOG
passes).
➁ The near point signal is turned on.
➂ The near point signal is turned off (after the DOG
has passed).
For this operation, the limit switches for detecting
the forward limit and the reverse limit should be
provided on the PC.
When the limit switch for limit detection is actuated,
the home position return operation is not performed
even if the home position return operation is
started. Move the dog by performing the JOG
operation so that the limit switch for limit detection
is not actuated, then start the home position return
operation.
-1PG PULSE GENERATOR UNIT
2N
Home position
*1
Near point return direction
BFM #3 b10 = 0
signal DOG
operation
% #
Home
position
OUTLINE OF OPERATION MODES
*1 The example above shows the case where the
BFM #3 b12 is set to 0
(DOG input polarity OFF → ON).
*2 When the limit switch for limit detection is turned
on, the pulse output is immediately stopped (BFM
#25 b3: ON). At this time, the clear signal is also
output.
< When the stepper motor is used >
When the stepper motor is used, rigid attention should
be paid to the following items.
➀ If the motor capacity is not sufficient compared with
the load torque, the motor may stall. In such a
case, even if the specified quantity of pulses are
supplied t the motor, the expected drive quantity
may not be obtained.
➁ Start and stop the motor slowly enough (by setting a
long acceleration/deceleration time to the BFM
#15) so that the acceleration/deceleration torque
does not become excessive.
➂ A resonance point is present in low speed
operation. It is recommended to avoid this point.
Set the bias speed (BFM #6), and do not perform
operation at a speed slower than that.
➃ An external power supply may be required for signal
communication with the drive amplifier.
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