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17. Self-diagnosis Mode
EP 1B Technical Manual
Melco Embroidery Systems
(3) LED diagnosis
(1) After the buzzer diagnosis steps, START LED starts to blink. Press the key to indicate "OK,"
and press the key to indicate "NG (No Good, or Failure)."
[MENU_LED BLINK? ]
(2) When the MENU LED starts to blink, press the key. When it does not blink, press the key.
[FREE TENTION/ENT ]
(4) Solenoid diagnosis
(1) After the LED diagnosis, press the ENTER key. If the solenoid is in excitation, [ON TENTION/ENT] is
displayed. If the actuation sound is heard, press the key. If not, press the key.
(5) Upper shaft sensor diagnosis
The items in the screen message [000 H H] respectively indicate the number of H/L times on the
VELO signal, SAFEPH signal level and XYACTPH signal level.
(1) The leftmost number on the display of [000 H H], at the left side indicates how many times the
SAFEPH becomes H. This means that the count number increases every time the VELO signal
level becomes H. To confirm the the VELO signal, rotate the handwheel rotate one cycle. The
number will be 410 to 420. (Driving motor has 45 slits on the gear, in this case moderating ratio
is 9.2. Therefore, the number equals 414 (45slits x moderating ratio 9.2 =414)). The number
varies between 410 and 420 approximately, depending on the rotation of the handwheel and
shield plate position.
(2) The two kinds of signal levels are indicated as H and L on the EP1B’s phase diagram as per
attached. Rotate the handwheel by hand. If it rotates according to the specifications, press the
key to indicate "OK." If the phase is out of range, remove the top cover and adjust the shield
plate position.
[Z MOTOR/START ]
* On the item (5), if the result is NG (No Good), the diagnosis steps of rotating the DC driving
motor for upper shaft will be skipped.
(6) Diagnosis for the upper shaft DC driving motor
(1) After confirming that the upper shaft sensor is OK, go to the DC driving motor diagnosis. When
you press the START key, the DC driving motor for the upper shaft starts to rotate.
When the STOP key is pressed, the rotation of the motor stops. When key is pressed, the
rotation speed will increase.
[SPEED=200 ]