This belt should be mounted so that the overlap trails when the belt sander is used, sometimes these belts will have arrows indicating the direction of rotation but not always. The arrows usually disappear after a bit of use anyway so if you change grits or re-use belts it is good to know which way to run the belt by looking at the join.
Here another fix that has worked for me. Take some ordinary electricians tape and make several laps around the idler pulley on the belt sander. Put more thicknesses near the center of the idler, than the outside. This effectively builds a small crown on the pulley and makes the belt stay centered. Also, always relieve the tension on the belt when not using the sander. The belt can stretch and tracks poorly if this happens.
SOURCE: Burgess BBK20
Instead of the face of the pullies being perfectly straight,a slight crown , meaning high in the center, will help the blade track to the center better. Most of the big band saws have crowned faces on the pully faces where the blade acually touches. The other option is to look for wear on the ajustment system or shaft(s) bearings.I am persuming no vibration while running.
SOURCE: WB-37 tracking
Has the "crowning " on the drive roller been worn away . That is the slight barrel shape of the roller . It is that which keeps the belt tracking so I would look at that first.
als try the tension as any trace of belt slip will cause the belt to de track.
SOURCE: The Belt of my craftsman 3x21 sander slowly moves off track.
There is a leveling (screw/knob) on the side of the belt sander. Turn it up and the belt will drift in one direction. Turn it downward and the belt will drift in the opposite direction. play with this leveling screw/knob until you reach a good balance and the belt will stop drifting.
SOURCE: The track belt keeps dislodging from brush roller
No...once they are stretched out, usually caused by softening of the track material due to water chemistry issues, the only solution is new tracks.
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John
SOURCE: My treadmill belt keeps coming off track and I've
see the video and adjust it.
However adjust the speed sensor, see the diagram, test for open, clean it, and tight the connector very well
God bless you
You need to adjust the tracking knob which is by the front handle that looks like a triangle head screw. Make sure the belt tension leaver is tight and the belt has enough tension on it. Quickly press and release the start switch and note the centering of the belt. It should be in the center of the bottom platen. If it is not, adjust the tracking knob and bump the switch again. If the belt is going in the wrong direction turn the knob the other direction. Once you are close the center of the platen, press the power switch to turn the unit on and lock the trigger. Firmly hold the unit vertically from the front handle. Fine adjust the tension knob to center the belt and make sure the belt is not hitting the case which will cause damage. You should be able to use the belt sander without the belt slipping off. Let the sander do the work, do not push down and limit the side to side motion. If the belt will not stay on then the belt is too large or the torsion spring needs to be adjusted to applying more tension on the belt and drive roller.
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