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 micro switch.
6. Re-tighten the set screw.
7. Retract the radius die and re-check.
8. If further adjustment is required, repeat steps.
CALIBRATING THE DIGITAL
READOUT DISPLAY /
“BA” MODELS
Automatic depth-of-bend and digital readout functions on
all “BA” models are performed by an electronics package
consisting of three main components. The circuit board
assembly, digital encoder and the zero angle micro
switch. (See figure 3-C)
CIRCUIT BOARD ASSEMBLY
The printed circuit board is made up of three basic
components. The main circuit panel, front display panel
and wire ribbon that connects the two. The main circuit
panel is held in position by “card guides” and then plugged
into a “pin-edge” connector mounted internally in the front
upright of the bender. A bypass board for trouble shooting
is also attached (stored) “piggyback” style on the back of
the main circuit panel.
(See page 41 for proper use of jumper board.)
t
DIGITAL ENCODER
The digital encoder is located just below the right side gate
assembly and enclosed in a metal box. As the encoder
rotates by the means of a flexible coupler attached to the
barrel shaft, it registers degrees and shares this
information with the main circuit panel.
t
ZERO ANGLE MICRO SWITCH
The zero angle micro switch is located up front just
below the right side gate assembly and attached to the
bender frame. The zero angle micro switch has three dis-
tinct functions.
1. Initiates the counting cycle and serves as an
adjustment device for properly calibrating the die angle.
2. Resets the die angle to zero upon retraction of the
radius die.
3. Advances the “steps” in the STATION window when
using the MEMORY function.
NOTE:
Only slight adjustments of 4 degrees or less can be
made to the die angle reading on digital models. The
digital readout is accurately maintained with the help
of logic functions in the digital control board and optical
sensors of the encoder. The system automatically re-
calibrates itself upon full retraction of the radius die as
the zero angle micro switch is tripped. By adjusting the
trip arm that activates the zero angle micro switch you
can effectively “stall” or advance the counting process
which will in turn change the die angle reading. If the die
angle appears to be more than 5 degrees out of
calibration it is most likely a faulty encoder. Dirt, oil or
moisture will contaminate the encoder and cause it to
malfunction. If the encoder becomes contaminated,
remove from the machine and clean with alcohol or T.V.
tuner spray. DO NOT use harsh or oil based solvents.
To properly calibrate the digital readout, follow the steps
outlined below:
1. Turn the machine on.
2. Place a set of bending dies in position.
3. Using a carpenters square, advance the radius die
until the back gates are at a true 90 degrees,
contacting the inside of the square evenly across
the front. (See figure 1-A)
40 Bender Operation Manual
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 service.
Figure 1-A
Figure 13-C
Summary of Contents for 1302-BA
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