5. Loosen the set screw on the adjustable trip arm
located directly underneath the depth-of bend
plate and adjust so that it just activates the
microswitch.
6. Re-tighten the set screw.
7. Retract the radius die and re-check.
8. If further adjustment is required, repeat steps.
OPERATING THE MACHINE MANUALLY USING
THE ELECTRIC SOLENOID VALVE
All “BAS” models incorporate an electronic
soIenoid valve that controls operation of the top cylinder
for all bending functions. The solenoid valve is located
to the rear of the machine, just below the oil filter.
(See figure 1-C)
Figure 1-C
The solenoid valve is an electric spool valve that uses
electric-magnets (coils) to activate the valve spool. You
can use the manual “buttons” on the end of each coil to
temporarily activate the top cylinder should a malfunc-
tion occur with the automatic controls or the solenoid
valve itself. (See figure 2-A)
The manual buttons control the top cylinder as follows;
To advance the radius die -
Press the right button
inward using an insulated tool or non-conducting rod.
To retract the radius die -
Press the left button inward
using an insulated tool or non-conducting rod.
NOTE:
The manual control function of the solenoid valve
should effectively advance or retract the radius
die under all conditions. The manual button
should be pressed firmly to activate.
SOLENOID VALVE
MAINTENANCE
Certain symptoms and suggested repair procedures are
explained below.
t
The valve Inadvertently “sticks” causing the top
cylinder to uncontrollably advance or retract.
Operating the valve manually will often dislodge foreign
particles that may have become trapped in the valve
spool. If this does not free the valve, remove the solenoid
coil covers and make sure there is no foreign matter that
could interfere with the moving parts. Clean and
reassemble.
t
The valve spool Is free but still does not activate
with the control board or twin foot switches.
Remove the solenoid valve coils and check for an open
or shorted circuit. Check all electrical connections.
t
The valve spool Is free and the coils are not
open or shorted, but It still does not activate with
the control board or twin foot switches.
Check the
incoming voltage to the valve. Proper incoming voltage
should be between 208 - 230 volts A.C.
t
There Is no voltage to the solenoid valve or the
voltage Is too low.
Check the fuse on the control
board or see electrical diagrams on pages 4.
Bender Operation Manual 39
Figure 2-A
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