Wellsaw 1316S Bedienungsanleitung PDF herunterladen (Seite 7)

Notes on Sawing

It is widely recognized that a proficient operator is a

key to optimum bandsawing. He makes certain the

machine is properly maintained and adjusted for

dependable operation. He carefully sets up each

cutting job to prevent damage to the machine and

obtain the best performance from the equipment.

Experienced blade dealers can be very help-ful in

selecting the grade and proper tooth blade for each

sawing job. All blades should be straight, have sharp

teeth with uniform set, and be “broken in” at a

reduced feed rate to obtain good cutting performance

and blade life.

Every cutting situation has special characteristics

requiring some experimentation to determine which

blade, speed and feed rate will achieve the most

satisfactory result. Cutting charts indicate a good

starting point, but must be modified by direct

experience if optimum performance is desired.

Here are some helpful pointers for adjusting speed

and feed for good cutting performance.

1. Make sure the saw is cutting a good chip from the

workpiece.

2. Watch for blue chips or excessive “smoke”

indicating heat in the cut which could damage the

blade or work harden the material being cut.

3. Watch for excessive vibration or chatter marks on

the cut-off piece indicating possible damage to the

saw teeth by “hammering”.

4. Check the cut-off piece for flatness. A dull blade

or excessive feed will produce a “belly” in the cut.

5. Inspect the blade for worn, rounded or shiny

cutting edges. Avoid force cutting which will allow

chips to “weld” to saw teeth and eventually cause the

teeth to be stripped off the blade.

6. When experimenting, start with a slow speed and

feed rate. Gradually increase blade speed and then

feed pressure by small amounts until adverse effects

are noted. You can then set the speed and feed at a

reasonable level for continuous cutting. Remember

that blade speed and feed pressure must be balanced

to keep cutting a good chip.

Trouble Shooting

Premature Dulling of Blade Teeth

1. Feed rate too high or low. Check recommendation.

2. Blade speed too slow or too fast.

3. Faulty material; heavy scale, hard spots, etc.

4. Verify material analysis.

5. If coolant flow is not covering saw teeth, increase coolant flow

rate.

6. If saw is vibrating in cut, reduce blade speed or increase feed

rate.

7. Chipped or broken tooth may be lodged in cut.

8. “Chip welding” caused by improper feed and speed.

9. Incorrect coolant mixture.

10. Incorrect blade selection

11. Improper break-in of new blade. New blades should be run

initially with reduced feed pressure for approximately 50 to

100 square inches.

12. Saw blade teeth may be hitting blade guides. Check for

proper blade size.

Saw Blade Vibration

1. Incorrect blade speed for material.

2. Blade tension insufficient.

3. Back-up bearing may be worn.

4. Incorrect choice of saw tooth pitch.

5. Incorrect coolant mixture.

6. Incorrect feed setting. Increase feed.

7. Workpiece not firmly clamped in vice.

8. Worn or improperly adjusted saw guides. Check and make

necessary adjustments.

Blade Teeth Chipping or Ripping Out

1. Blade pitch too coarse. Use a fine pitch saw blade on thin work

sections.

2. Improper break-in of new blade. Do not start a new blade in an

old cut.

3. Work piece not held firmly enough. Clamp work securely.

4. Introduce cooling if it is not being used.

5. Faulty material; scale or hard spots.

6. Blade gullets may be loaded. Use higher viscosity lubricant or

coolant.

7. Blade speed and feed may need adjustment.

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