Jet J-4421-2, Инструкция по эксплуатации и каталог запасных частей

Страница: 7 / 20

7
5.0 Machine set-up
5.1 Grinder set-up
1. Uncrate the grinder and remove it from its
shipping skid.
2. Remove the table raiser crank which is taped
to the grinder and install the crank on the
raiser shaft, securing it with the set screw in
the crank.
3. Spot and anchor the grinder according to
instructions in the next section.
4. Remove the grinding disc (which is in a
protective sleeve) from the machine.
5. Clean the protective coating on the machine
surfaces with mineral spirits or other type of
non-flammable cleaning fluid.
6. Clean the surface of the drive disc using a film-
free cleaner such as naptha.
7. Remove the grinding disc from its protective
sleeve and install it on the drive disc according
to instructions in
sect. 9.1 Removing and
replacing grinding discs .
8. Tilt the table to level using the protractor on
the table, then raise the table assembly until it
is more-or-less in the middle of the drive disc.
9. Check table for level according to instructions
following in this section.
10. Establish power to the grinder using
instructions in
sect. 6.0 Electrical which follow
in this section.
11. Grinder may be released for service.
Figure 1: Base hold-down diagram
5.2 Spotting and anchoring the
sander
1. Set 3/8 inch floor anchors in the pattern
indicated in Figure 1.
2. Set the grinder on its anchors.
3. Level the table using the protractor on the
table.
4. Put a machinist's level on the table.
5. Use the two leveling bolts on the rear of the
base to level the grinder. Shim under the
anchor positions as needed to level the
grinder.
6. Secure the grinder to the floor using the
anchors.
5.3 Checking table level
While the machine has been run at the factory and
checked before shipment, you may want to check
the table level before releasing the grinder for
service.
1. Disconnect the grinder from its electrical power
source to prevent accidental start-up (if you
have already connected it to power.)
2. Unlock the table tilt lock handle.
3. Place a machinist's square against the table
and disc face.
4. Using the table tilt adjustment handle, adjust
the table until it is at a right angle to the disc
face.
5. Check the protractor pointer. It should be on
the ZERO degree mark of the protractor. If not,
adjust the pointer by loosening its attachment
screw and moving it to the ZERO mark, then
retighten the screw.
6.0 Electrical
The Model J-4421 has a 220/440 Volt, 3-phase
motor. It is shipped wired to the specifications on
the customer order.
The machine uses a LVP or "low voltage
protection" ON/OFF switch which trips to the OFF
position when voltage drops below a pre-
determined safe level. This feature protects the
operator from a quick re-start when service voltage
cuts out or varies excessively. After tripping, the
LVP switch must be positively reset by the operator
before the motor receives power.
The LVP switch has a coil inside its case which is
designed to work with a specific voltage level. If
you decide to change the voltage source to the
grinder from 220 to 440 (or the reverse) this coil
must be replaced (in addition to changing the
motor's internal wiring connections.)
6.1 Service wiring
1. Disconnect and lock out power to the service
branch you are going to use to power the
grinder.
2. Connect the branch ground wire to the ground
wire in the cable. The ground wire in the cable
will be either green, or green with a white
trace.
3. Connect the three power wires to the three
power wires in the cable.