JMA VIENNA User Manual page 15

indicated by the arrow on the display.
- once the adjustment has been made, lock the tracer support again, by tightening the
setscrew (t).
• Lock the slide, remove the adjustment templates and press the FUNCTION button to
return to the counter function.
3.4 CONVENTIONAL ADJUSTMENT (WITH NO ELECTRI-
CAL CONTACT)
3.4.1 DEPTH ADJUSTMENT (WITH NO ELECTRICAL CONTACT)
See figure 9
• Switch off the machine using the master switch, in order to be able to carry out the
operation in complete safety and prevent the cutter from being moved.
• Clamp the two adjustment keys (L) in "side 1" of the clamps, so that the bottom shoul-
der of the adjustment key is in contact with the inner face of the clamp (J).
• Release the slide by pressing the button (M). Bring the adjustment keys closer to the
cutter (F) and tracer (P).
• Rest the tip of the tracer on the flat part of the adjustment key. In this position,
manually turn the cutter in the opposite direction to the operating direction, until it has
completed a full turn.
- if the cutter lightly touches the adjustment key, this indicates that the depth is co-
rrectly adjusted.
- if the cutter turns freely, this indicates that the cutter is too far back from the tracer
and that the milling depth is insufficient. the depth needs adjusting.
- if the cutter is jammed up against the adjustment key, this indicates that the cutter
is too far forward in relation to the tracer and that the milling depth is excessive. the
depth needs adjusting.
• To adjust the cutter depth, you need to proceed as follows with the micrometric
tracer:
- undo the setscrew (z) so that the tracer shaft is released, but leaving the setscrew (z)
very gently touching the tracer shaft. in this way, you will prevent the tracer shaft from
turning accidentally during the depth adjustment phase.
- turn the adjustment wheel (a) clockwise to the move the tracer back.
- turn the adjustment wheel (a) anticlockwise to move the tracer forward.
• Once you have adjusted the depth, lock the tracer again by means of the setscrew.
• Lock the slide and remove the adjustment keys.
N.B.: the tracer depth adjustment system has a reference drum (o) which facilitates
the particular adjustment operation. to reset the tracer, make the white line on the
reference drum (o) coincide with the white line on the graduated drum (n), in the fo-
llowing way:
- With one hand, firmly hold the adjustment wheel (A).
- With the other hand, turn the reference drum (O).
each notch on the graduated drum corresponds to a variation of 0.05 mm. in the tracer
depth.
3.4.2 SIDE ADJUSTMENT (WITH NO ELECTRICAL CONTACT)
See figure 10
• Switch off the machine using the master switch, in order to be able to carry out the
operation in complete safety and prevent the cutter from being moved.
• Clamp the two adjustment keys (L) in "side 1" of the clamps, so that the bottom shoul-
der of the adjustment key is in contact with the inner face of the clamp (J).
• Make sure that the support faces of the positioners (H) coincide perfectly with the
top shoulders of the adjustment keys. if this is not the case, undo the right positioner
tightening screw and tighten it up again in the right position.
• Release the slide by pressing the button (M). Move the adjustment keys closer to the
cutter (F) and tracer (P).
• Insert the tracer tip into the notching of the adjustment key. In this position, manually
turn the cutter in the opposite direction to the operating direction, until it has completed
a full turn. Make sure that the cutter lightly touches the adjustment key notching. if this
is not the case, make the necessary adjustment in the following way:
- undo the setscrew (t) on the tracer support (s).
- Move the tracer support sideways, by turning the adjustment wheel (r).
- once you have made the adjustment, lock the tracer support again, by tightening the
setscrew (t).
• Lock the slide and remove the adjustment keys.
3.5 KEY CUTTING
See figure 11
• Decide which side of the clamp you are going to use to cut the key. If necessary, turn
the clamp to change the side.
• Put the original key into the left-hand clamp, so that the start of the teeth more or less
coincides with the edge of the clamp. With the key in this position, clamp it by turning
the clamp knob (B).
- if you are clamping the key in "side 1" or "side 2", make sure that the back of the key
is resting correctly on the base of the clamp.
- if you are clamping the key in "side 3" or "side 4", make sure that the clamp guide is
correctly inserted into the key guide.
• Put the blank key into the right-hand clamp and align the two keys in the following
way:
- raise the positioners, and rest them on the top shoulders of the keys. use knob (d)
to do this.
- With the blank key in this position, clamp it by turning the clamp knob.
n.B.: Both the original key and the blank key must be inserted from the left side of their
respective clamps.
• Release the slide by pressing the button (M), and move the keys towards the cutter
(F) and the tracer (P).
n.B.: the positioners withdraw automatically when you press the button (M).
• Remember that you must work from left to right. Rest the original key against the
tracer and start cutting, moving the slide sideways with the help of the slide-traverse
lever (u). Make sure that the pressure exerted by the original key against the tracer is
that required by the spring inside the slide.
• Once you have finished cutting: lock the slide and remove the keys.
N.B.: if the key cutting operation has left some burrs on the cut key, these can be
removed using the brush the machine is fitted with for this purpose.
3.5.1 CUTTING KEYS WITH NARROW BLADES
to cut this type of key, and for the cutter to reach the maximum depth in the key to be
cut, you need to use "side 2" of the clamp.
3.5.2 CUTTING kEYS WITHOUT SHOULDERS
See figure 12
• Put the two wedges (Y) into the vertical grooves (E) in the clamps.
n.B.: depending on the length of the key to be cut, choose one pair of grooves or
another.
• Put the original key into its clamp, until the tip of the key comes up against the wedge
(Y). With the key in this position, clamp it by turning the clamp knob (B). Do the same
with the blank key.
• Remove the wedges, release the slide and start the cutting operation.
3.5.3 cutting cross-shaPed KeYs
See figure 13
• To cut this type of key, you need to use "side 1" of the clamp.
• Insert the wedges (X) into the vertical grooves (E) in the clamps. Insert them so that
the opening in the wedge is looking towards the cutter or tracer.
N.B.: depending on the length of the key to be cut, choose one pair of grooves or
another.
• Put the original key into its clamp, until the shoulder of the key comes up against the
wedge (X). With the key in this position, clamp it by turning the clamp knob (B). Do the
same with the blank key.
• Release the slide and start the cutting operation.
n.B.: this is a key with three toothed blades. so the same operations have to be repea-
ted twice more, but with the other two blades of the key.
4.- MAINTENANCE
When carrying out any maintenance operation, it is necessary to adhere to the fo-
llowing requirements:
• Never carry out any maintenance work with the machine in operation.
• The electrical power cable must be unplugged.
• The indications in this manual must be strictly adhered to.
• Only use original spare parts.
4.1 REPLACING THE BRUSH
See figure 14
When the brush starts losing its ability to remove burrs, it needs to be replaced with
a new one.
the procedure is as follows:
1) switch off the machine and unplug the power cable.
2) insert the blocking rod in the hole in the cutter shaft.
3) With the help of a 4 mm allen key, undo the screw securing the brush.
4) replace the brush and tighten it up with the screw.
5) removing the blocking rod.
4.2 REPLACING THE CUTTER
See figure 15
When the cutter is worn it needs to be replaced with a new one. The procedure is as
follows:
1) switch off the machine and unplug the power cable.
2) undo the two screws securing the cutter's transparent protection, with the help of
a no. 4 allen key.
3) remove the protection from the cutter, to obtain a bigger working area.