3. WARNING: THE RIP FENCE MUST BE PARALLEL TO THE MITER GAGE SLOT AND SAW BLADE TO HELP PREVENT KICKBACK WHEN RIPPING.

4.The saw blade is set parallel to the miter gage slot at the factory and the fence must be parallel to the miter gage slot and saw blade in order to do accurate work and help prevent kickback when ripping. To check the alignment:

5.Position the fence close to the miter gage slot, as shown in Fig. 22A. Push fence toward saw to insure alignment screws are in contact with the fence rail. Clamp the fence to the table by pushing down the locking lever (B). The fence should be parallel with the miter gage slot.

6.If an adjustment is necessary, proceed as follows:

7.Loosen the two screws and jam nuts (D) Fig. 22A, and lift up locking lever (B). Then while holding the fence bracket (F) Fig. 22A firmly toward the rear, move the rear end of the fence (A), by adjusting the two screws (D) until the fence is parallel with the miter gage slot. Then push down locking lever (B). Tighten jam nuts (D) on adjusting screws.

8.The clamping action of the fence (A) Fig. 23, can be adjusted by lifting up locking lever (B) and turning nut (E) clockwise to increase or counterclockwise to decrease the tension of the clamping action of the fence.

REPLACING THE RIP FENCE SCALE

A metric scale can be attached to the rip fence as follows:

1.Extend the rip fence guide rail as far as it will go.

2.Use a pencil and “mark” the guide rail at the “0” location of the scale and remove the standard scale.

3.Place the metric scale on the guide rail referencing the “0” mark.

4.Collapse the guide rail and check to see if the “0” mark is accurate.

5.If an adjustment is necessary, adjust the “0” mark by loosening nut (G) Fig. 23, and turning screw (H) clockwise to move the “0” mark to the left, and counter clockwise to move the “0” mark to the right, once the “0” is set properly on the rip fence guide rail, turn nut (G) counterclockwise to lock nut (G) against screw (H).

RIP FENCE EXTENSION

The saw has the capability to increase its ripping capacity by extending the rip fence guide rails.

To extend the rip fence guide rails pull lever (A) Fig. 24, to the right, and pull out on the guide rails. Then lock the extended rails.

RIPPING THIN STOCK

To adjust the fence, pull up on lever (B) so that the top of the rip fence can be removed, and repositioned on the rip fence as shown in Fig. 25. This is only necessary when the fence guide rails are extended.

When using the guide rails for ripping, the fence must be positioned as shown in Fig. 25, so that the wood can rest on the ledge (C,) up against the rip fence.

An auxiliary wood insert can be placed in the gap between the saw table and the rip fence extension to add extra support.

B

H

G

E

Fig. 23

A

Fig. 24

C

B

Fig. 25

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Porter-Cable 3812 instruction manual Replacing the RIP Fence Scale, RIP Fence Extension, Ripping Thin Stock
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3812 specifications

The Porter-Cable 3812 is a robust tool designed for those who prioritize efficiency and precision in woodworking and sanding applications. This high-performance sander is particularly suitable for both professional woodworkers and DIY enthusiasts, offering a range of features and technologies that enhance its functionality.

One of the defining characteristics of the Porter-Cable 3812 is its powerful motor. With a 12-amp motor delivering variable speeds from 8,000 to 12,000 orbits per minute, it allows users to adjust the sanding speed based on the material and desired finish. This versatility makes it ideal for various tasks, whether it's removing paint, sanding down rough edges, or finishing surfaces to a smooth sheen.

Another notable feature is its dust collection system. The 3812 includes a built-in dust port that can be connected to a vacuum for effective dust management. This feature not only keeps the workspace cleaner but also improves visibility, enabling users to work more efficiently and safely. The sander is designed with user comfort in mind, featuring an ergonomic handle that reduces fatigue during extended use.

In terms of design, the Porter-Cable 3812 offers a compact and lightweight structure, allowing for easy maneuverability and transport. Its sturdy construction ensures durability, making it a reliable choice for frequent use. The tool utilizes a hook-and-loop sanding pad system that allows for quick and easy sandpaper changes, minimizing downtime and increasing productivity.

Additionally, the sander is equipped with a soft-start feature, which gradually ramps up the speed to reduce the risk of swirls and uneven finishes at the beginning of the sanding process. This technology is particularly beneficial for intricate projects that require precision and care.

The Porter-Cable 3812 is also compatible with a wide range of sandpaper grits, making it adaptable to diverse sanding tasks. It combines power, precision, and user-friendly features to make woodworking and sanding projects less daunting.

Overall, the Porter-Cable 3812 stands out as a reliable tool that effectively meets the needs of woodworkers. Its blend of powerful performance, advanced features, and thoughtful design solidify its place as a significant choice for anyone looking to achieve exceptional sanding results.
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