8
6. Remove the two bolts, underneath the machine casting,
that secure the disc guard to the casting (See Figure 11).
7. Through the hole in the disc guard casting, locate and
remove the TWO set screws that secure the drive disc to
the arbor. One set screw clamps on the arbor key and the
other clamps on the arbor shaft, itself. Be sure you loosen
both of them.
Figure 12: Locating the set screws that secure the disc to
the arbor
8. Slide the disc and its guard off of the machine, together
(See Figure 13).
Figure 13: Removing the guard and drive disc, together.
9. The V-belt can now be removed from the drive arbor.
10. Install the new belt on the top pulley.
11. Slide the disc and guard back into position.
12. Reinstall the disc guard bolts underneath the table.
13. Position the drive disc so that it is no more than 1/16
inch away from the table, then tighten BOTH of the set
screws by inserting the hex wrench through the hole in the
disc guard casting.
14. Rotate the machine back onto its base and secure it
with all four mounting bolts.
15. Install the belt over the bottom pulley.
16. Tension the belt so that when pressed, in the middle of
its travel, it has no more than one belt's width of
movement -- then tighten the four motor bolts.
17. Observe the alignment of the motor pulley and arbor
pulley. If necessary, correct their alignment by shifting the
motor slightly on its mount (which involves loosening and
retightening the mounting bolts and checking tension) or
by shifting the pulley slightly on the motor shaft (which
involves loosening the motor pulley set screw and sliding
the pulley into alignment) or by moving the arbor pulley
slightly on its shaft (See Figure 14).
18. When the pulleys are accurately aligned, reinstall the
belt guard.
19. Reestablish electrical power to the machine.
Machine Setup
Basic Setup
1. Position the machine where it will be located on the
shop floor. When positioning the machine, consider the
type of work which will be done on it so you allow sufficient
room not only for the workpieces, but also for service to
the machine.
2. Open the door in the base of the machine and, using
the holes in the base as a template, mark the floor for the
position of the hold-down bolts.
3. Move the machine to expose the hold-down bolt marks
and install anchors for the hold-down bolts.
4. Put the machine back over the hold-down anchors and
bolt the machine securely to the shop floor. THIS MUST
BE DONE FOR SAFE OPERATION OF THE MACHINE.
5. Establish an electrical service connection to the
machine. This will vary according to the model purchased.
ALL ELECTRICAL CONNECTIONS SHOULD BE MADE
BY A QUALIFIED ELECTRICIAN WHO IS FAMILIAR
WITH YOUR STATE AND LOCAL CODES. Many models
of these machines make use of high voltages which pose
a significant risk of
serious injury or DEATH
if proper
knowledge and precautions are not used. Electrical
instructions are included in the
Electrical
section of these
Machine Setup
instructions.
6. Machines with belts are shipped with the belts in slack
condition. During the electrical hookup phase of machine
setup, the belt will have to be tightened and checked for
tracking. See the
Belt Replacement
section for
instructions on this procedure.
Figure 14: Loosening pulley set screws to allow the
adjustment of pulley on arbor shaft.
Summary of Contents for BTM250
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