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6

Use of the Miter Gauge

The miter gauge can be used on either the disc or

belt surfaces to sand accurate angles on workpieces.

When using the gauge, alone, you sand a single angle.

However, by tilting the table and using the miter gauge in

combination with the table tilt, it is possible to sand

compound angles, as well.

When grinding a compound angle you should always

check the accuracy of your setup by sanding a piece of

scrap material before doing any finish sanding on the

actual workpiece.

1. Set the angle you wish to sand using the scale on the

miter gauge.

2. Tighten the miter gauge securely so the miter reference

surface will not move while you are sanding.

3. Place the workpiece against the miter reference surface

and slide it along the reference surface and into the

sanding disc or belt. The basic method is shown in Figure

5, below.

Figure 5: Use of the miter system

Maintenance

Belt Replacement

1. Disconnect the power to the machine to prevent

accidental start-ups. If the machine is plugged into an

outlet, unplug it. If the machine is hardwired to a branch

circuit with a junction box, remove the fuse or trip the

circuit breaker to the branch.

2. Remove the lock knob and top cover (See Figure 6).

3. Remove the side guard and table.

4. Release the belt tension by turning the tension handle

in a counterclockwise direction (See Figure 7). If the

handle is difficult to turn, perform

Track Mechanism

Maintenance

according to the instructions following this

section.

5. Remove the belt.

6. Check the drums and platen for scoring or signs of wear

which might require service or replacement.

7. Check the height of the platen with a straight edge. If it

is not 1/32 in. above the drums, adjust it according to the

instructions in

Platen Replacement or Adjustment

in the

Machine Setup

section of this manual.

8. Check the drums for looseness which might cause

tracking problems. Correct any loose condition by

tightening or replacing any parts as required.

9. Slip the new belt onto the drums and platen.

10. Adjust the tension handle clockwise until the belt is flat

against the platen and there is no curling or buckling of the

belt in the middle.

11. Turn the drums by hand to see if the belt tracks

moreor- less true. JUST BECAUSE THE OLD BELT

TRACKED CORRECTLY DOES NOT MEAN THE NEW

BELT WILL. Always check the tracking when replacing a

belt.

12. To adjust the tracking:

12.1. Plug the machine back into the outlet or

reestablish power in the branch.

12.2. Loosen the tracking lock knob.

12.3. Jog the motor on and off as necessary to observe

the tracking, and turn the tracking knob as

necessary to make the belt track in the center of the

platen and drums. Turn the tracking knob clockwise to

move the belt toward the right and counterclockwise to

move the belt toward the left.

12.4. When the belt seems to be tracking correctly, turn

the motor on and leave it running while fine tuning the

tracking.

12.5. Lock the tracking lock knob.

12.6. When the lock knob is secure, turn the power

off and disconnect the machine from the outlet or

branch as in Step 1, above.

13. Replace the table, side guard, top cover and lock knob

by reversing steps 3 and 2, above.

14. If you have not already done so, reconnect the power

to the machine and return it to service.

To p  c o v e r

To p  c o v e r lo c k  sc re w

Tra c k  a d ju stin g  k n o b

Tra c k in g  lo c k  k n o b

B e lt

Figure 6: Top cover components

Содержание BTM250

Страница 1: ...Belt Disk Sander Model BTM250 Operation manual Table of Contents ...

Страница 2: ...2 Cover Page 1 Table of Contents 2 General Specifications 3 Warnings 3 Operating Instructions 4 Maintenance 6 Setup and Installation 8 Wiring Diagrams 10 Troubleshooting 13 Replacement Parts 14 ...

Страница 3: ...ll labels affixed to the machine Failure in following all of these warnings can cause serious injuries General Machinery Warnings 1 Always wear protective eye wear when operating machinery Eye wear shall be impact resistant protective safety glasses with side shields which comply with ANSI Z87 1 specifications Use of eye wear which does not comply with ANSI Z87 1 specifications could result in sev...

Страница 4: ...oes 3 A dust collection system is recommended The operator should also wear a dust mask at all times 4 Additional precautions may be necessary for sanding materials which are flammable or have other hazardous properties You should always consult the manufacturer of such materials for instructions on sanding and handling 5 Do not force or jam the workpiece into the sanding disc 6 Before sanding alw...

Страница 5: ...mit quick adjustment to the vertical or horizontal positions To Adjust to Vertical 1 Unlock both of the lock bolts These are located under the arbor cover 2 Move the arm to vertical until it contacts its stop 3 Tighten both of the lock bolts and replace arbor cover To Adjust to Horizontal 1 Unlock both of the lock bolts 2 Move the arm to horizontal until it contacts its stop See Figure 3 3 Tighten...

Страница 6: ...t 7 Check the height of the platen with a straight edge If it is not 1 32 in above the drums adjust it according to the instructions in Platen Replacement or Adjustment in the Machine Setup section of this manual 8 Check the drums for looseness which might cause tracking problems Correct any loose condition by tightening or replacing any parts as required 9 Slip the new belt onto the drums and pla...

Страница 7: ...s 1 Disconnect the power to the machine to prevent accidental start ups 2 Peel off the old abrasive disc 3 Clean the drive disc surface using naptha or a similar nonflammable solvent that will dry film free 4 Pull the protective backing half off the new abrasive disc 5 Position the new disc carefully so it is centered accurately on the drive disc See Figure 8 6 When accurately centered remove the ...

Страница 8: ... 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...

Страница 9: ...to adjust miter groove parallelism Disc Table Gap Adjustment 1 Using a scale check the gap between the edge of the table and the face of the disc It should be very close to 3 32 inch If it is much more or less than that distance adjust it as follows 2 Disconnect the electrical power to the machine 3 Using the access hole on the top of the disc guard locate and loosen the two set screws that secure...

Страница 10: ...ws to allow adjustment 6 Using a straight edge as shown in Figure 22 adjust the platen height until it is 1 32 inch higher than the crown of both the drive and idler drums 7 Tighten the platen adjustment screws 8 Reinstall the table and belt 9 Check and adjust if necessary the tracking of the belt according to instructions in Belt replacement 10 Reinstall the guards and covers 11 Check and adjust ...

Страница 11: ...E POWER WHEN THE MACHINE IS USED IN A COMMERCIAL OR INDUSTRIAL ESTABLISHMENT In these cases you must connect your machine to the service branch using a hardwired junction box connection Motor Rotation The motor should be turning counterclockwise the belt sander should be moving downward and the disc sander should be turning clockwise These motors are wired at the factory for correct rotation Volta...

Страница 12: ...he power to the machine 4 Turn the machine on The motor should now be turning in the correct direction Voltage Conversion Three phase machines are pre wired for 230V or 460V per customer request If it becomes necessary to change the voltage remove the back cover from the base and place the machine on its side Remove the terminal cover from the motor Rewire the motor according to the motor connecti...

Страница 13: ...Tracking is out of adjustment 2 Too much belt tension 3 Not enough belt tension 4 Belt is jointed improperly 5 Lack of crown on the drive roller 6 Worn bearings 1 Adjust the belt tracking 2 Loosen the tension until the belt is just taut 3 Tighten the tension until the belt is more taut 4 Check the belt for an irregular seam or shape 5 Remove the belt and put a straight edge along the drive roller ...

Страница 14: ...14 ...

Страница 15: ...bolt M8X50 4 44 key 5x5x75 1 14 flat washer 10 3 45 spring ring17 for shaft 2 15 hex bolt M10X25 3 46 bearing 2 16 belt cover 1 47 supporting stand 1 17 connecting shaft 1 48 spring ring for shaft 17 1 18 fixed seat 1 49 belt wheel 2 1 19 flat washer 6 2 50 hex bolt M10x40 2 20 hex bolt M6X20 2 51 flat wahsr 10 2 21 hex bolt M8X20 1 52 swivel stand 1 22 belt wheel 3 1 53 spring ring for shaft 17 4...

Страница 16: ... knob 1 100 flat wahsr 5 8 71 phillips head screw M5x6 1 101 guard cover 1 72 pointer 1 102 phillips head screw M5x6 2 73 sliding pole 1 103 flat washer 5 2 74 supporting body 1 75 adjusting handle sleeve 1 76 adjusting handle 1 77 flat washer 2 78 hex nut M8 2 79 adjusting shaft 1 80 hex bolt 1 81 knob 1 82 flat washer 2 83 small pressing spring 1 84 hex nut M6 1 85 nut M6 1 86 washer 1 87 adjust...

Страница 17: ...17 ...

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