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User manual Jet Tools, model JJ-6CSX

Manafacture: Jet Tools
File size: 4.04 mb
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Language of manual:en
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manual abstract


4. Replace the gib (B) and screws (A). Finger tighten only at this time. 5. Press against the cutting edge of the knife at the center of the blade with a piece of wood. DO NOT USE FINGERS! This is to ensure that the cam is making proper contact with the knife. 6. Snug the inside two screws, then the outside two screws. 7. Release the piece of wood pressing against the knife and tighten the gib screws. 8. Replace the remaining two blades by repeating steps 1 – 7. 9. Determine if knives need to be set. Follow the Outfeed Table Adjustment section steps 3 and 4 only to determine if knives need to be set. Do not complete the entire outfeed table adjustment. If knives need to be set, proceed to the Setting Cutterhead Knives section. Setting Knives for Rabbeting and Nicks To position the knives for rabbet cuts, take a shop scale with 1/32” graduations and place it against the end of the cutterhead. Slide the knife out until it is at the 1/32” mark on the scale; that is, the knife will now be 1/32” beyond the edge of the cutterhead. The gib should remain in normal position, even with the edge of the cutterhead. (Figure 30). This adjustment will ensure that the knife clears the end of the gib and cutterhead, and has good contact with the workpiece. (See the Rabbeting section for further information.) Note: This will also correct for small nicks without requiring replacement of blades. Figure 29 Figure 30 20 Determining Correct Table Height When you receive the jointer, the knives have been pre-set at the factory. However, the height and parallelism of the knives with the outfeed table should be checked, and any needed adjustments made, before putting the jointer into operation. The outfeed table and cutterhead knives are correctly adjusted when all three blades are parallel to the outfeed table and all three blades are set at the same height in the cutterhead. Outfeed table too high – If the outfeed table is too high, a curved finished surface results (Figure 31). Figure 31 Outfeed table too low – If the outfeed table is too low, the work will have a gouge, or snipe, at the end of the cut (Figure 32). Figure 32 Outfeed table at correct setting – Figure 33 illustrates the correct setting of outfeed table level with the knives. The workpiece will rest firmly on both tables with no open space under the finished cut. 21 Figure 33 Operating Controls 1. Hand Wheel for Outfeed Table 2. Outfeed Table 3. Fence 4. Fence Adjustment Handle 5. Cutter Guard 6. Infeed Table 7. Hand Wheel for Infeed Table 8. On/Off Switch Operation Important: If you are inexperienced at jointing, use scrap pieces of lumber to check settings and get the feel of operations before attempting regular work. Stabilize long workpieces by using an assistant, or roller stands set level with the outfeed or infeed table surface. The fence should be adjusted to create minimum exposure to the cutterhead during the jointing operation. 9. Table Lock Knob 10. Fence Tilt Lock Handle 11. Belt Guard 12. Fence Travel Lock Handle 13. Depth Limiter Check the following before operating the jointer: • Outfeed table must be set level with the high point of the knives. • Fence adjusted for minimum exposure of cutterhead, and locked at desired angle. • The cutterhead guard must be in place and operating properly (except when rabbeting). • Infeed table set for desired depth of cut. • Stand away from the cutterhead and turn the machine on for a few moments. Listen for any odd noises, rubbings, vibrations, etc. Correct such problems before attempting operations on the jointer. • Carefully check your workpiece for knots, holes, staples or any foreign material that might damage knives or pose a risk of kickback. Also check the workpiece for grain orientation. 22 Hand Placement Never pass hands directly over the cutterhead. At the start of the cut, the left hand holds the workpiece firmly against the infeed table and fence while the right hand pushes the workpiece in a smooth, even motion toward the cutterhead (Figure 34). After the cut is under way, the new surface rests firmly on the outfeed table. The left hand is transferred to the outfeed side and presses down on this part of the workpiece, at the same time maintaining flat contact with the fence. The right hand presses the workpiece forward and before the right hand reaches the cutterhead it should be moved to the work on the outfeed table. Figure 34 Surfacing Always use a hold down or push block when surfacing stock. Surfacing, or jointing the face of stock, is shown in Figure 35. Adjust the infeed table for depth of cut. Cuts of approximately 1/16” at a time are recommended, as this allows better control over the material being surfaced. More passes can then be made to reach the desired depth. Figure 35 Edge Jointing Edge Jointing (Figure 36) is the most common operation for the jointer. Set fence square with the table. Depth of cut should be the minimum required to obtain a straight edge. Do not make cuts deeper than 1/8"...

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