6.1.4
Home Position Return Operation
< Home position return operation >
The home position return operation varies depending on
thestart position.
➀
The near point signal is turned off (before the DOG
passes).
➁
Thenear 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.
*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
theload torque, themotor may stall. In such a
case, even if the specified quantity of pulses are
supplied t the motor, the expected drive quantity
may not beobtained.
➁
Start and stop themotor 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 thedriveamplifier.
Home position
return direction
BFM #3 b10 = 0
Near point
signal DOG
operation
*1
*2
Home
position
Limit switch
for limit
detection
%
#
$
6
FX-1PG/FX
2N
-1PG PULSE GENERATOR UNIT
OUTLINE OF OPERATION MODES
6-5
