The Belt Tracking Unit is designed to keep the belt running true. If it should wander to either side, the mechanism will return the belt to it’s proper alignment.
Two methods of belt realignment
“Reverse Action” will have the pinch-rollers open and the belt running free. If the belt should wander to a side, the opposite set of pinch-rollers will engage until the belt is returned to alignment.
“Constant Pressure” will have both sets of pinch-rollers closed. If the belt should drift to a side, the pinch-rollers on that side will open and remain open until the belt is realigned.
Specifications
- Inside frame width Minimum: belt width + 10″
- Belt width
- Frame maximum thickness *
- Frame vertical dimension *
- Distance from belt to obstructing frame Minimum: 3″
- Floor to belt distance **
* C & D not needed when floor mounted.
** F not needed when frame mounted.
Notes: Dimensions A & E both have critical minimums. (A) With Trackers mounted flush against the outside frame, the belt edge needs 5″ (x2) to clear the sensing whisker. (E) The belt’s path through the pinch-rollers is 3″ below the topmost edge of the Tracker Frame.
Setup Instructions
1. Air Supply
Air supply must be clean and dry with a capacity of (1) CFM. Normal operating pressure is 20 PSI and in certain cases, 40 PSI may be required to operate the Tracker.
2. Position
The tracking unit is positioned on the return run of the belt as shown below. The distance back to the tracking unit from the tail pulley (Dim X) is not critical and will vary from one machine to another. In normal circumstances this distance is about 2 to 3 ft. or ½ the belt width.
However, should the tail pulley ‘A’ also be the driving pulley, or should the belt be tight at this point for any other reason, then dimension ‘X’ should be at least equal to the width of the belt.
3. Angle to Belt
Normally each headstock is set at an angle of 10° to the belt, in the direction of travel (angle ‘Z’); for slack belts angle ‘Z’ may be as little as 5°; for tighter belts, angle ‘Z’ may be increased up to 20°.
Note: Angle ‘Z’ should only be increased beyond the 10° after the air pressure has been increased to the allowable maximum of 40 PSI.
Instructions for Setting Rollers
4. Width Settings
The moveable pressure roller (G) should be set at belt thickness + ⅛”. This can be done by adjusting the Roller Cradle with bolt ‘N’.
