IAI America PCON-CA - Manual (Page 211)

Chapter 8
Troubleshooting
POWER CON
PCON-CA/CFA
203
[In the case of Pulse Train Control Mode]
Situation Possible cause Check/Treatment
The actuator does not
stop at the command
position.
PIO signal processing or parameter
setting is incorrect.
1) Incorrect electronic gear ratio
2) Acceleration/deceleration is set
incorrectly in the host controller.
3) Noise
4) The pulse-train type, a parameter, is
selected incorrectly.
5) The unit moving distance per pulse,
which is a setting condition of
electronic gear ratio, a parameter, is
too small.
1) Check the setting of electronic
gear ratio. The host controller
also has the electronic gear ratio
parameter. Set the electronic
gear ratio not to be inconsistent
with that of the host controller. In
addition, reduce the electronic
gear ratio as much as possible.
If not, data overflow may occur
in arithmetic processing to
disable correct positioning.
[Refer to 3.3.4 [1] Electrical
Gear Setting.]
2) The actuator operates at the
speed and
acceleration/deceleration based
on the frequency of input pulses.
Check if the
acceleration/deceleration set in
the host controller exceed the
rating acceleration/deceleration
of the actuator.
3) Noise can be misread as the
pulse if it jumps into the pulse
train.
Take proper measures against
noise. [Refer to 1.7 Noise
Elimination and Mounting
Method.]
Check the cable connection
between the controller and
AK-04 if AK-04 is used.
• Cable length :
50mm or shorter
recommended (as short as
possible)
• Shield treatment :
Use the shield treatment wire.
4) Check the pulse-train type.
[Refer to 3.3.4 [2] Format
Settings of Command Pulse
Train.]
5) Do not make the unit moving
distance less than the resolution
of the encoder. The actuator
does not move unless pulses by
the resolution of the encoder are
input.
[Refer to Caution in 3.3.4 [1]
Electrical Gear Setting]
(Note) In case of 2) or 3), the
actuator may not
sometimes operate.
You may not find case 4)
when the actuator is
moved for a long
distance at a high
frequency.
The actuator does not
reach the command
position when operated
with extremely low
speed.
To avoid unnatural move, the actuator
would not move unless the differential
pulse becomes 3 pulses or more.
Set to the full-servo mode. (Set
Parameter No.53 Stop Mode initial
setting to 4.)