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3. Connect the 7.2 mm hose coupling adaptor to the compressed air supply.
»
The compressed air is now installed.
6.3.
MOUNTING THE BACK-STOP DISC
i
The purpose of the back-stop discs is the alignment of workpieces on the vacuum plate.
1. Undo the knurled nut.
2. Rotate the back-stop disc until it projects above the edge of the vacuum plate.
3. Tighten the knurled nut.
7.
Operation
7.1.
CLAMPING A WORKPIECE
CAUTION
Risk of injury due to a loose workpiece
Workpieces that come loose from the vacuum plate can cause injuries.
»
Before starting to machine the workpiece, check that the workpiece is securely restrained.
»
Machining forces must be less than the restraining forces.
»
If the workpiece is subjected to higher forces, restrain it using back-stop discs.
»
Arrange the back-stop discs to counteract the machining forces or feed movements.
B
C
,
i
Lay the sealing cord into the grid of the vacuum plate to match the workpiece contour and prevent loss of vacuum.
NOTICE! Moisten the hands to lay the sealing cord.
ü There must be no burrs or unevennesses on the contact face of the workpiece.
ü Contact area between the vacuum plate and workpiece cleaned.
1. Cut the sealing cord to suit the size of the workpiece.
2. Insert the sealing cord into the recesses of the grid face, following the dimensions of the workpiece (1).
NOTICE! The bore for pulling vacuum must lie within the area enclosed by the sealing cord.
3. Insert the sealing cord, butting the ends against each other. Do not compress the sealing cord or stretch it.
4. Place the workpiece on the sealing cord. If necessary, align the back-stop discs (2).
5. Switch on the vacuum and clamp the workpiece.
»
The optimum operating pressure for the Venturi vacuum pump is 4.0 bar.
6. Check that the workpiece is securely seated.
»
The workpiece is now clamped.
7.2.
REMOVING THE WORKPIECE
1. Before removal of the workpiece, clean the vacuum plate under vacuum using an industrial vacuum cleaner.
2. After cleaning away all debris and chips, switch off the operating vacuum.
3. Remove the workpiece.
8.
Maintenance
The vacuum plate is maintenance-free.
9.
Faults and troubleshooting
Fault
Operating vacuum not
achieved or is too low, and
the compressed air unit is
running
Possible cause
Leaky compressed air hoses
Dirt between the workpiece
and vacuum plate
Seal defective or not fitted
Kink in the compressed air
hoses
Shut-off valve not fully turned
on.
Action
Exchange the compressed air
hoses
Clean the faces of the work-
piece and vacuum plate
Change the seal
Align the compressed air
hoses correctly
Turn the shut-off valve fully
on
Performed by
Trained specialist for mechan-
ical work
Trained person
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