Tension/Tracking
Proper blade tension and tracking are important for optimum bandsaw performance. See Figure 4 for bandsaw tension and tracking control loca- tions.
Tension Control
Tracking Control
Figure 4. Tension and tracking controls.
TENSION
Since a number of blade metal types and tooth configurations will work in this saw, proper blade tension is dependent upon the type of blade and the material to be cut. Too much tension will result in blade breakage. A properly tensioned blade will track the cutting line accurately and the cut will be smoother.
Initially proper blade tension can best be achieved by determining the amount of blade deflection:
1.Ensure that the power is off and the saw is unplugged. Slide the blade guide assembly all the way to the left so the blade is fully exposed.
2.Press, with moderate pressure, on the face of the blade with your thumb.
3.Turn the tensioning knob at the top of the machine to change the amount of tension. The blade should flex no more than 1/4".
If the tension seems correct, make the other adjustments to the saw (aligning guides, tracking and speed) and test run it on a scrap piece of material. If the blade is not cutting properly, the tension may be incorrect and you’ll need to read- just the tension. Remember to reduce the blade tension when the saw will not be in use, this will help to prevent premature wear or breakage of the blade.
TRACKING
To adjust tracking, disconnect the bandsaw from the power source. Raise the saw bow as high as possible and remove the cap screw from the hinged wheel cover. This will allow you to see the bandsaw wheel which has a machined step and a groove on it.
The socket head cap screw and lock nut on the top of the saw bow changes the plane of rotation of this wheel. Turn the wheel by hand (remove the belt guard and turn the motor pulley) for a few revolutions and observe whether the edge of the blade stays snug against the machined step. If it does not, adjust the cap screw until the blade stays against that step through several complete revolutions of the blade.
Once it stays centered when rotated by hand, lock the cap screw in place with the locking nut. Reconnect the machine to power and turn the machine on for just a few seconds. Observe the action of the blade and the wheel during this test, being sure to maintain a safe distance should the blade become disengaged. If the blade stays snug to the step, close the cover and secure with the cap screw.
The saw blade is dangerously sharp. Use extra care when handling the blade, or work- ing near it. Serious injury is possible.
G1011 7" x 12'' Bandsaw |