The welder is designed for intermittent use. Repeated welding within a short period of time may cause the welder to overheat.
12.Remove the blade from the clamps, and carefully inspect it. The spacing of the teeth should be uniform and the weld should be located in the center of the gullet. Misalignment is easily noted at this time from the weld appearance. See Figure 19 for examples of incorrect welds.
13.If the weld is imperfect, refer to the trouble- shooting section on page 28 for possible remedies to any problems. Make corrections before annealing.
Annealing
The blade must now be annealed, or cooled at a controlled rate to prevent it from becoming too brittle.
14.Turn the pressure selector knob all the way to the left so the clamp jaws are closest to each other.
15.Insert the blade into the clamps so the weld area is centered between the clamps. Secure the blade in the jaws with the clamp handles.
16.Quickly press and release (jog) the anneal button (Figure 18). Repeat the
Do not press and hold the anneal push button. The weld will be overheated and will fail due to the excessive heat.
17.Release both blade clamps, allow the blade to cool, then remove the blade from the clamps.
18.Check the integrity of the weld. Bend the blade to form a radius at the point of the weld. The size of the radius should be approximately the same as the radius of the band saw drive wheel. The weld must hold and not break or crack after forming the radius. If the weld breaks, cut away the welded area and repeat the welding- annealing process.
19.Check to make sure the welded section is the same thickness as the rest of the blade. If not, grind off excess weld material using the grinder (Figure 20). Figure 21 illustrates some unacceptable grindings.
Figure 19
Figure 20
Figure 21
18