Chipbreaker |
| Pressure Bar |
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The chipbreaker breaks chips/curls as they are cut by the cutterhead and forces chips to eject from the cutting area. Due to its functions within the planer, the chipbreaker should be adjusted carefully and checked frequently for movement. To adjust the chipbreaker:
1.Disconnect planer from its power source and remove the top cover. Note the location of the setscrews and lock nuts. See Figure 20.
Figure 20. Chipbreaker adjustment.
2.Place your test block under the middle of the chipbreaker (the table should still be at the same height as it was when you set the infeed and outfeed rollers).
3.Loosen the lock nuts at both ends of the chipbreaker and turn the setscrews to raise or lower the chipbreaker as necessary. The chipbreaker will move evenly, so it does not matter which setscrew you turn. (You will need to raise the second setscrew if the chipbreaker needs to be lowered).
4.When the chipbreaker reaches its proper height .040'' below the cutterhead height, tighten the lock nut and adjust the other setscrew and lock nut to match.
Like the chipbreaker, the pressure bar controls lumber as it passes under the cutterhead. The pressure bar keeps lumber from lifting after it has been planed. If the pressure bar is incorrectly positioned, a number of machining defects (including snipe and board lines) can result. A pressure bar set too low can also place excess load on the planerÕs motor. The pressure bar should be adjusted along with the infeed and out- feed rollers. To adjust the pressure bar:
1.Disconnect the planer from its power sup- ply.
2.Remove top cover. Note setscrew and lock nut pictured in Figure 21. Loosen the lock nuts.
Figure 21. Pressure bar adjustment.
3.Place the gauge block under the center of the pressure bar and adjust the setscrew until the pressure bar makes slight contact with the tip of the block. Like the chip- breaker, the pressure bar can be adjusted with one setscrew. Make sure to adjust the second setscrew to match the one youÕve just adjusted.
4.Tighten the lock nut in place.
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| G1033 20" Planer | |
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