ELECTRICAL REPAIR
The following section contains instructions and
illustrations to aid in electrical repair. Most electrical
components cannot be repaired and require only removal
and installation of new components. If replacement parts
are to be installed, refer to the wiring diagrams found on
pages 49 & 50.
DANGER!
This machine contains high voltage. Disconnect
power at the receptacle before performing any
electrical repairs. Secure plug so that it cannot be
accidentally plugged in during servicing.
CHECKING THE MICRO
SWITCHES / AUTOMATIC
MODELS
The micro switches shown below play a very important
part in the control features of your machine. These
switches remain in the circuit at all times in order for the
controls to function properly.
MICROSWITCH
DESCRIPTION
"BAS"
MODELS
Top Micro Switch
X
Right Foot Switch
X
Left Foot Switch
X
Depth -of-Bend Switch
X
Zero Angle Micro Switch
Each micro switch has three terminals for connecting the
necessary wires. These terminals will be labeled as
follows:
“C” or Common
“NO” or Normally Open
“NC” or Normally Closed
To tell if the micro switch is good, remove it from the
machine and use an ohmmeter to check the circuits as
follows:
WITH THE SWITCH IN THE NEUTRAL POSITION -
Place one of the prongs from your ohmmeter on the
“common” terminal of the switch and the other on the
“normally closed” terminal. At this time there should be
continuity between the two. There should be no continu-
ity between the “common” and “normally open” at this
time.
(See Fig. 2-A)
WITH THE LEVER OR BUTTON DEPRESSED
-
Place
one of the prongs from your ohmmeter on the “common”
terminal of the switch and the other on the “normally
open” terminal. At this time there should be continuity
between the two. There should be no continuity between
the“common” and “normally closed” terminals at this
time. (See figure 1-A)
CAUTION:
Replace ALL faulty switches immediately.
NEVER attempt to bypass or “hot-wire” any of
the micro switches.
40 Bender Operation Manual
WARNING!
Electrical equipment should be serviced by
certified electrician’s only. This manual should
not be viewed as sufficient instructions for those
who are not otherwise qualified to operate,
service or maintain the equipment discussed.
Although reasonable care has been taken to
provide accurate and authoritative information in
this manual, no responsibility is assumed by the
manufacturer for any consequences arising out
of the use of this material.
Figure 2-A
Figure 1-A
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