Vexta PMC Series User Manual

28
Problem
The motor rotates in
the wrong direction.
Motor rotation is
erratic.
Motor start up is
unstable.
Measures
Connect the CW pulse signal line to the
pulse/CW pulse signal input terminal, and
connect the CCW pulse signal line to the
rotation direction/CCW pulse signal input
terminal.
If the motor rotates in a counterclockwise
direction the motor and driver are normal.
Recheck the rotation direction signal levels.
(“photocoupler ON” = clockwise,
“photocoupler OFF” = counterclockwise)
For harmonic geared type and 10:1 of MG
geared type, due to the gear’s construction,
the direction of rotation of the output shaft is
opposite to the direction of rotation of the
motor itself as commanded by pulse input
(Refer to page 16).
Connect the CW pulse signal line to the
rotation direction/CCW pulse signal input
terminal, and connect the CCW pulse signal
line to the pulse/CW pulse signal input
terminal.
The motor will run irregularly if two pulses are
input at the same time.
Make sure the motor shaft and load are
securely attached and properly aligned.
Recheck the operating conditions, and if
necessary lighten the load.
Check points
7. In 2-pulse input mode
(pulse input mode switch
in the 2P position) are the
CW and CCW pulse signal
lines connected
backwards?
8. In 1-pulse input mode
(pulse input mode switch
in the 1P position) leave
the rotation direction/CCW
pulse signal input terminal
unconnected and try
inputting a pulse signal to
the pulse/CW pulse signal
input terminal.
9. Is harmonic geared type or
gear ratio of 10:1 of MG
geared type used?
10. While in 2-pulse input
mode (pulse input mode
switch in the 2P position)
are the both of pulse/CW
pulse and rotation
direction CCW pulse
signal input at the same
time?
11. Are the motor shaft and
load properly aligned? Is
the load too heavy for the
motor?
First check items 5, 6, 7 and 8.

Vexta PMC Series Specifications

General

Brand	Vexta
Model	PMC Series
Category	Engine
Language	English