8. ELECTRIC MECHANISM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Error status

#8 Error code appears on the display window when the foot switch is depressed.

 

 

 

 

 

 

 

 

 

Probable causes

 

Check/ repair/ adjust

 

Parts to be replaced

 

 

2. Power supply circuit board is

a. Measure the resistance between the fuse

 

Power supply circuit

 

 

defective

 

when

the

feed

No.1 terminal which is close to the center

 

board

 

 

mechanism

does

not

move

of the power supply circuit board and pin

 

 

 

 

and error code E-A0 appears

2 of P5 (DC300) connector.

 

 

 

 

on the display window.

 

If the resistance is ∞ Ω, the power supply

 

 

 

 

([E.A1] KE-436B, 436C)

circuit board is not defective.

 

 

 

 

 

 

 

 

 

b. Separate P9 (POWER) connectors on the

 

 

 

 

 

 

 

 

 

main circuit board, turn on the power, and

 

 

 

 

 

 

 

 

 

measure the voltage across the following

 

 

 

 

 

 

 

 

 

pairs of pins, pins 4 and 6 and pins 5 and

 

 

 

 

 

 

 

 

 

7, in the connector on the cord.

 

 

 

 

 

 

 

 

 

If the voltage is +55V in each case, the

 

 

 

 

 

 

 

 

 

power supply circuit board is not

 

 

 

 

 

 

 

 

 

defective.

 

 

 

 

 

 

 

 

 

After measurement, turn off the power,

 

 

 

 

 

 

 

 

 

wait at least 5 minutes, and rejoin P9

 

 

 

 

 

 

 

 

 

connectors.

 

 

 

 

 

 

 

 

 

c. Separate P9 (POWER) connectors on the

 

 

 

 

 

 

 

 

 

main circuit board, turn on the power, and

 

 

 

 

 

 

 

 

 

measure the voltage across pins 2 and 3

 

 

 

 

 

 

 

 

 

on the cord.

 

 

 

 

 

 

 

 

 

If it is + 24V, the power supply circuit

 

 

 

 

 

 

 

 

 

board is not defective.

 

 

 

 

 

 

 

 

 

After measurement, turn off the power,

 

 

 

 

 

 

 

 

 

wait at least 5 minutes, and rejoin P9

 

 

 

 

 

 

 

 

3638Q

connectors.

 

 

 

 

3. Home position sensor is defec-

a. Turn the poewr switch off and then on

 

Home position sensor

 

 

tive when the work clamp

again, and move the work clamp to near

 

 

 

 

moves

in

an

unexpected

the home position by hand.

 

 

 

 

direction and error code E-A0

If the home position sensor LED is lit, the

 

 

 

 

appears on the display window.

home position sensor is not defective.

 

 

 

 

([E.A1] KE-436B, 436C)

b. Check that P1 (ORG) connector on the

 

 

 

 

 

 

 

 

 

main circuit board and the home position

 

 

 

 

 

 

 

 

 

sensor are plugged in.

 

 

 

 

 

 

 

 

 

c. See “8-9. Checking the input sensor and

 

Main circuit board

 

 

 

 

 

 

 

DIP switch input” to make sure that the

 

 

 

 

 

 

 

 

 

home position sensor is connected.

 

 

 

 

 

 

 

 

 

If item a causes no problem and item b

 

 

 

 

 

 

 

 

 

results in defective sensor input, either

 

 

 

 

 

 

 

 

 

the cord connection is poor or the main

 

 

 

 

 

 

 

 

 

circuit board is defective.

 

 

 

 

 

 

 

 

 

 

4. Pulse motor and cord are

a. Separate P6 (YPM) and P7 (XPM)

 

X- or Y-pulse motor

 

 

defective

when

the

work

connectors on the main circuit board.

 

assembly

 

 

clamp operates

abnormally

Measure the resistance between the

 

 

 

 

and error code E-A0 appears

following pairs of pins, pins 4 and 6 and

 

 

 

 

on the display window.

 

pins 5 and 7, in the connector on the

 

 

 

 

([E.A1] KE-436B, 436C)

cord.

 

Main circuit board

 

 

 

 

 

 

 

If the resistance is 2–3 Ω, it is not

 

 

 

 

 

 

 

 

defective.

 

 

 

 

 

 

 

 

 

After measurement, rejoin P6 and P7

 

 

 

 

 

 

 

 

 

connectors.

 

 

 

 

 

 

 

 

 

b. If item a causes no problem, the main

 

 

 

 

 

 

 

 

 

circuit board is defective.

 

 

 

 

 

 

 

 

3639Q

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KE-430B, 430C series

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