7.
The solenoid on the control valve is not functioning. REFER TO SECTION 8.3
8.
The foot pedal switch is not functioning properly. A voltage test may be run on the terminal strip
in the control box to determine if the foot switch is working properly.
WARNING: THERE IS LINE VOLTAGE PRESENT IN THE CONTROL BOX WHEN THE
MACHINE IS POWERED. THESE TESTS SHOULD BE PERFORMED BY A
QUALIFIED ELECTRICIAN.
Sect. 9.9 POWER UNIT & Sect. 10.0 ELECTRICAL SCHEMATIC will help with below.
To test the foot switch, power the machine and test the voltage between terminal #’s 17, 18, 19 &
Ground. Test the voltage between terminal #19 and Ground. The reading should be 110 to 120 volts.
This will determine that you have the proper voltage to the pedal. With the pedal up, the voltage
should read 110 to 120 volts between #17 and Ground. There should be no voltage reading between
18 and Ground. With the pedal depressed, the voltage should read 110 to 120 volts between #18 and
Ground here should be no voltage reading between #17 and ground. If these readings are not
correct, continue on with the following steps:
A.
Turn the machine’s power off at the disconnect switch. Remove the cover on the foot pedal and
check for any loose connections.
B.
Make sure that the switches are adjusted properly. (You should hear two distinct "clicks",
approximately 1/2 inch (12mm) apart, when depressing the pedal.) There is a set screw adjustment
on the pedal shaft to adjust the switches.
C.
Check the switches with an Ohm meter.
9. Damage to the foot pedal cord: Check the continuity of the wires in the cord with an Ohm meter.
Make sure that the power to the machine is off and locked out. The wires must be disconnected
from the pedal and terminal block.
►
CAUTION: ALL ELECTRICAL WORK PERFORMED ON THIS IRONWORKER
SHOULD BE PERFORMED BY A QUALIFIED ELECTRICIAN.
A.
MOTOR WILL NOT RUN:
1.
Check the SHEAR/NOTCH and PUNCH/TOOL selector switches. The machine will not start
unless the selector switches are both in the START position.
2.
Check the disconnect switch. Make sure that it is in the ON position.
3.
Check the emergency stop palm button. A defective or stuck emergency stop button will not allow
the machine to be powered. Check the emergency stop button for this station of the machine with
an Ohm meter. With the switch in its normal position, the reading should show continuity from
one terminal to the other.
8.1A ELECTRICAL TROUBLESHOOTING:
SHEAR/NOTCH STATION
PAGE 79
