Craftsman 113.24181 Owner's Manual page 11

ALIGNING RIP FENCE
The fence should slide easily along the bars and always
remain in alignment (parallel to sawblade and miter gauge
grooves).
The alignment is maintained by a spring underneath the
fence which bears against the front guide bar.
To move the fence, loosen the lock handle and grasp the
fence with one hand at the front.
For very close adjustments, grasp the guide bar with both
hands and move the fence with your thumbs.
Place fence on saw but DO NOT LOCK IT.
Move the REAR END of the fence slightly to the right or
left ... when you release it, the fence should "spring'"
back to its original position.
If it does not, the spring pressure must be INCREASED.
1. Loosen the screws.
2. Move Spring slightly toward front of fence.