Service Manual
Original issue
May 2014
Page
56/64
Model
XL-420
| 56
No.
Name of al code
Way of detect
Solution
1
Trouble of protection
relay
If exceed amount of electric current has
followed to bobbin winder motor more than
50ms out of 250ms at condition of PWM output
is off and releasing protection relay while main
power is on.
Replace CPU
board is needed.
Trouble of protection
relay
In case if main axis rotates within about 250ms
at condition of PWM output is on and released
protection relay while main power is on.
Replace CPU
board is needed.
2
Trouble of PWM output
In case if main axis rotates within about 250ms
at condition of PWM output is off and
connecting to protection relay while main
power is on.
Replace CPU
board is needed.
Trouble of loading
current
Regardless of motor turned on or off, if exceed
amount of electric current has followed to main
axis motor for more than 3seconds.
Replace CPU
board is needed.
3
Trouble of main shaft
stop (detected it is
moving even though it
should be stopped.)
In case if main axis rotates faster than 300rmp
for more than 300ms while main axis motor is
not been turned on.
Replace CPU
board is needed.
In case if main axis motor rotates more than 3
rotation while main axis motor is turned off.
Replace CPU
board is needed.
4
Trouble of main shaft
rotation (detected
abnormal speed)
In case if main axis motor rotates faster than
1000rmp for 10ms.
Replace CPU
board is needed.
In case if PWM output of main axis motor is
lowest duty and rotates 150rpm faster than
aiming number of rotation while main axis
motor is turned on.
Replace CPU
board is needed.
5
Trouble of needle
swing motor H.P.
HP signal is not turn to "ON" at initial
movement of hoop when turning on main
power.
Replace switch
of stepping motor
is needed.
HP signal is not turn to "OFF" at initial
movement of hoop when turning on main
power.
Replace switch
of stepping motor
is needed.
6
Trouble of feed motor
H.P.
HP signal is not turn to "ON" at initial
movement of hoop when turning on main
power.
Replace switch
of stepping motor
is needed.
HP signal is not turn to "OFF" at initial
movement of hoop when turning on main
power.
Replace switch
of stepping motor
is needed.
SEC.25-3 Trouble
contents
with LED on panel (3)