To ensure that the belt sander tracks in the center of the platen, adjust the

• A. rear roller
• B. table adjustment
• C. tracking knob
• D. front roller

Answer: (D)

Belt tracking is about how the belt runs across the rollers so it sits centered on the platen. The control that centers it is the tracking adjustment. This knob changes the angle or position of the rear roller relative to the front roller, nudging the belt left or right until it rides evenly in the middle. You tweak it a little, run the sander briefly, and recheck until the belt stays centered during use. The platen’s position itself doesn’t shift the belt side-to-side, and the front roller isn’t the usual control for centering; it mainly provides support and tension. If centering remains off after using the tracking adjustment, inspect rollers and bearings for wear or misalignment and ensure the drive belt is properly tensioned.