946001 3130 Hor Band Saw.pmd

946001 3130 Hor Band Saw.pmd

16

Troubleshooting

Problem

Excessive blade breakage

Premature blade dulling

Crooked cuts

Probable cause

Material loose in the vise

Incorrect feed or speed

Incorrect blade tension

Teeth in contact with work before saw is started

Blade rubs on wheel flange

Misadjusted blade guides

Blade too thick for wheel diameter

Cracking at weld

Teeth too coarse

Too much blade speed

Inadequate feed pressure

Hard spot or scale on material

Work hardening of material (especially stainless steel)

Blade installed backwards

Incorrect coolant or no coolant

Insufficient blade tension

Work not square

Potential solutions

1. Use more pressure to tighten vise.

2. Check right jaw pivot and lock bolts for tightness.

3. Check left jaw pivot bolt for looseness -- be certain the jaw is not tilting upward when you apply pressure to the work in the vise.

4. If you are stacking multiple pieces in the vise, be sure all of the pieces are captured by the vise pressure.

1. Check technical literature for recommended feeds and speeds for the material and blade you are using.

2. Check chip formation to adjust speed and feed to correct rate when sawing.

1. Adjust blade tension to where it just does not slip on the wheel.

1. Be sure the saw motor has come fully up to speed before beginning a cut and be sure the blade is not resting on the workpiece before the motor has come up to full speed.

1. Use paper cutting method of adjusting blade tracking.

See Blade Tracking .

2. Check drive and idler wheels for looseness in mounting parts or worn/damaged bearings.

1. Adjust blade guides.

1. Use a thinner blade. Check with your blade supplier for recommendations on blade thickness for a specific wheel diameter.

1. Replace blade.

1. Use finer tooth blade.

1. Try next lower speed or check technical literature for specific recommendations regarding speeds for specific blade and material being cut.

2. Check with materials supplier for recommendations on the workpiece material supplied.

3. If using coolant, check with supplier regarding correct coolant for the job.

1. Increase pressure while observing chip formation to be sure you are cutting efficiently.

1. Reduce speed of blade.

2. Increase feed pressure in scale or hard spots .

1. Work hardening materials such as stainless require a heavy, continuous cut. Be sure you are using a sharp blade, then, if necessary, release some counterbalance spring pressure by loosening the tension nut if work hardening of the material is a problem.

1. Reinstall blade so teeth point toward right end of saw.

1. Check with materials supplier and/or blade supplier for coolant recommendations.

2. Check with coolant supplier for specific recommendations on the blade and material you are using.

1. Increase tension so blade is above the slipping point.

1. Adjust the right vise jaw so it is at right angles to the blade.

2. Clamp work tightly in the vise.

3. Check blade for vertical and adjust, if necessary.

4. Move guide bearings as close as possible to work while still completing the cut.

5. Check guide bearings, seats and brackets for possible looseness or wear.

(Continued next page)

Troubleshooting

(Continued)

Problem

Rough cuts

Blade twisting

Unusual

wear on

side/back of

blade

Breaking

teeth

Motor running too hot

Probable cause

Feed pressure too great

Guide bearings not adjusted properly

Inadequate blade tension

Blade guides incorrectly spaced

Dull blade

Incorrect speed

Potential solutions

1. Observe chip formation to be sure cutting is efficient.

1. Adjust guide bearings according to instructions in this manual.

1. Increase blade tension so blade does not slip on the wheels.

1. Move guide brackets until they just clear the workpiece while making a complete cut.

2. For small section pieces, be sure the blade is sharp and correctly tensioned. Use less feed pressure.

1. Replace blade when it dulls.

2. Consider using a coolant, if not already used.

1. Check technical literature for recommended speeds and blade type for material being cut -- observe chip formation to verify efficient cutting.

1. Tighten guide bracket.

1. Check tightness of bearing seat bolt.

1. Use paper cutting method of setting blade tracking.

Blade guide assembly loose

Blade guide bearing assembly loose

Blade tracking too far away from wheel flanges

Worn upper wheel bearings

Loose upper wheel mounting assembly

Too much feed or speed

Blade too coarse

Incorrect blade for material

Cut is binding blade

Too much blade tension

Loose guide bearing eccentrics

Worn guide bearings

Incorrect guide bearing adjustment

Loose guide bearing bracket

Loose bearing seat attachment screw

Blade guides worn

Blade guide bearings not adjusted properly

Blade guide bearing bracket loose

Blade running on wheel flange

Teeth too coarse for work

Too heavy feed

Too slow speed

Vibrating work piece

Tooth gullets loading

Blade in contact with workpiece before motor is started

Blade tension too high

Worn transmission and worm gear

Gears need lubrication

1. Replace bearings if worn.

1. Tighten all bolts securing wheel to arm.

1. Try one step lower speed and observe chip formation for efficient cutting/feed rate.

1. Use finer blade. Check with suppliers for recommendations for the material you are cutting.

1. Check with blade suppliers for recommendations for exotic or unusual materials or specifications.

1. Be sure workpiece is flat on saw base.

2. Decrease feed pressure.

1. Reduce tension to just above point where blade slips.

1. Check eccentric jam nuts for tightness.

1. Check guide bearings for wear. Replace if necessary.

1. Adjust guide bearings according to instructions in this manual.

1. Tighten bracket on saw arm.

1. Tighten bearing seat attachment screw -- adjust bearing clearance.

1. Replace.

1. Check and adjust for proper clearance.

1. Tighten bracket to saw arm.

1. Adjust blade tracking using the paper cutting method.

1. Use blade with finer pitch.

1. Decrease feed rate -- observe chip formation to verify efficient cutting.

1. Increase blade speed. Check technical literature or blade or workpiece supplier for blade speed recommendations.

1. Be sure vise is tight.

2. Support slender cross section or long workpieces with appropriate in feed and out feed supports.

3. If stacking pieces in the vise, be sure all workpieces are securely captured by the vise.

1. Use coarser blade or one with a tooth geometry more appropriate to the workpiece being cut.

1. Always allow motor to come fully up to speed before beginning cut.

1. Decrease blade tension to just above slip point.

1. Replace gears in transmission gearbox.

1. Check gearbox and add oil as required.

17

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