JMA VIENNA Manual página 16

4.3 REPLACING THE TRACER
See figure 16
The procedure for replacing the tracer is as follows:
1) Switch off the machine and unplug the power cable.
2) Fully undo the screw (1) with the help of a 2.5 mm allen key, and remove the tracer (P).
3) Fit and secure the new tracer, making sure that it rests properly on its rear support
face.
4) It is a good idea to readjust the machine (depth adjustment and side adjustment).
Chapters 3.3 and 3.4 of this manual explain how to carry out these adjustments.
4.4 ADJUSTING THE MAXIMUM DEPTH OF THE SLIDE
See figure 17
In order not to damage the clamps and the cutter, it is necessary to establish a maxi-
mum cutting depth.
The distance between cutter-tracer and clamp has to be 0.1 mm. If this distance is
bigger or smaller, proceed as follows:
1) Switch off the machine and unplug the power cable.
2) Release the slide and move it closer to the cutter-tracer, until it butts up against it.
3) Remove the swarf tray.
4) Loosen the locking nut (2), with a 10 mm spanner.
5) Using a 3 mm allen key, adjust the setscrew (3) until you achieve a separation of
0.1 mm.
6) Tighten up the setscrew (3) with the nut (2), and replace the swarf tray.
4.5 REPLACING THE FUSES
If the machine does not start when you turn on the start switches, you need to check
the state of the fuses.
This operation is done in the following way:
1) Switch off the machine from the master switch and unplug the power cable.
2) Remove the fuse-holder which is to be found next to the master switch.
3) Check (using a tester) if any of the fuses have blown and, if necessary, replace the
blown fuse with one of the same type and value.
4.6 REPLACING THE START SWITCH AND THE BRUSH
BUTTON
See figure 18
This operation is carried out in the following way:
1) Switch off the machine and unplug the power cable.
2) Undo the 6 screws (4) securing the "left side guard", with the help of a 4 mm allen
key.
3) Carefully turn the "left side guard", in order to gain access to the switch or button
connectors.
4) Remove the connectors, noting down the position of each of them before hand.
5) Press down on the tabs (5), in order to be able to remove the switch or button.
6) Insert the new switch or button right into its housing.
7) Reconnect each of the connectors in their correct position.
8) Fit the "left side guard" and screw it in place with the 6 screws (4).
4.7 REPLACING AND/OR TIGHTENING THE BELT
See figure 19
This operation is done following the sequence below:
1) Switch off the machines and disconnect the power supply.
2) Introduce the blocking rod into the hole of the drill shaft.
3) Using a 4mm Allen key, release the screw that holds the brush, and remove it.
4) Introduce the blocking rod into the hole of the drill shaft.
5) unscrew the 6 screws that hold the "Right hand guard" in place, and remove it.
NOTE: The machine has a SELF-TENSIONING belt that does not need any tensioning
system. When it is assembled in the machine, it is automatically tensioned.
6) Remove the old belt by manually turning the pulleys, while forcing the belt sideways.
7) Remove the "Drill guard" to have more space to reach the screw that retains the drill.
8) Place the new belt round the motor pulley. Place the other end of the belt over the
lower part of the head pulley.
9) With the belt in that position, force it sideways so that it does not escape from the
pulley, at the same time turn the head using an 18 mm spanner.
NOTE: After having assembled the belt, make sure that each rib of the belt coincides
with its corresponding slot on the pulleys.
10) Re-fit the "Right side guard" and the "Drill guard".
11) Introduce the blocking rod into the hole of the drill shaft.
12) Re-fit the brush, and fix it using its screw.
13) Remove the blocking rod from the hole of the drill shaft.
4.8 REPLACING THE MOTOR
See figure 20
1) Switch off the machine and unplug the power cable.
2) Remove the swarf tray.
3) Turn the machine, to gain access to the "lower protection plate".
4) Undo the machine's 4 feet, and remove them.
5) Unscrew the 5 screws (10) securing the "lower protection plate", and remove it.
6) Disconnect the motor's power cable.
7) Screw on the machine's 4 feet, to be able to support the machine on its feet again.
8) Insert the blocking rod into the hole in the cutter shaft.
9) Undo the screw securing the brush, and remove the brush.
10) Remove the blocking rod from the cutter shaft.
11) Undo the 6 screws (6) securing the "right side guide", and remove it.
12) Undo the 6 screws (4) securing the "left side guide", and move it slightly to the left
to gain access to two of the seven screws holding the "motor guard" in place.
13) Undo the 7 screws (9) holding the "motor guard" in place, and remove it.
14) Remove the belt. To do that, manually turn the pulleys while forcing the belt si-
deways.
15) unscrew the 4 screws (11) that retain the "motor support".
16) Remove the motor together with the "motor support".
17) Unscrew the 4 screws (12) that retain the "motor support", and remove the old
motor.
18) Unscrew the retaining stud (13) that retains the small pulley on the motor, and
remove the small pulley.
19) Completely insert the small pulley onto the new motor. In this position, screw on
the small pulley using the retaining stud (13), taking care that the retaining stud is fitted
in its slot on the motor axle.
20) Place the new motor on the "motor support", so that the sides of the motor base
are tight up against the heads of the screws protruding from the "motor support" In this
position fix the motor using the 4 screws (12).
21) Fix the "motor support" to the plate using the 4 screws (11). Take care and gently
tighten the screws, because there are some rubber washers between the "motor sup-
port" and the plate that should not be over-tightened.
22) Tighten the nuts of the bottom part of the plate that act as counter-nuts to the
screws fixing the "motor support" to the plate.
22) Assemble the new belt. The method for doing this is explained in point 4.7 of this
manual.
24) Visually check that the belt is correctly assembled.
4.9 REPLACING THE MOTOR CAPACITOR
See figure 21
This operation is carried out in the following way:
1) Switch off the machine and unplug the power cable.
2) Insert the blocking rod into the hole in the cutter shaft.
3) Undo the screw securing the brush, and remove the brush.
4) Undo the 6 screws (6) securing the "right side guard" in place, and remove the guard.
5) Undo the 6 screws (4) securing the "left side guard" in place, and move it slightly to
the left to gain access to two of the seven screws holding the "motor guard" in place.
6) Undo the 7 screws (9) holding the "motor guard" in place, and remove the guard.
7) Undo the 4 screws (14) holding the "terminal box" cover in place, and remove the lid.
8) Disconnect the two cables on the old capacitor ( C ) and remove it.
9) Fit the new capacitor ( C ) and connect its two cables.
10) Put the cover onto the "terminal box", securing it with the 4 screws (14).
11) Fit the "motor guard", securing it in place with the 7 screws (9).
12) Fit the "left side guard", holding it in place with the 6 screws (4).
13) Fit the "right hand guard", securing it in place with the 6 screws (6).
14) Fit the brush, and fix it in place with its screw.
15) Remove the blocking rod from the cutter shaft.
4.10 REPLACING THE CLAMP RAISING CAM
See figure 22
If as a result of excessive wear it becomes necessary to replace the "clamp raising
cam", proceed as follows:
1) Switch off the machine and unplug the power cable.
2) Unscrew the clamp knob (B), and remove the clamp.
3) With the help of a small punch, hit the pin (16) until it is expelled from underneath
the slide.
4) Remove the knob (G) together with its shaft, pulling on it in the axial direction.
5) Remove the old cam. To do this, you can use a small rod to push the old cam from the
bottom of the slide, so that it comes out from the top of the slide.
6) Insert the new cam into its space, at the same time as you insert the shaft of the
knob (G) into its hole.
7) Make the hole in the shaft of the knob (G) coincide with the hole in the new cam. In
this position, insert the pin (16).
8) Replace the clamp and its corresponding knob (B).