SECTION 5: Operations
(Knife inverted for identification purposes.)
Figure 5. Recommended centering of a planer knife in the knife support.
Overview
Planer, jointer and other knives are danger- ously sharp. Use extreme caution, particu- larly after sharpening. Failure to exercise care while working near knives could result in severe injury.
Setting up the Model G2790 will depend upon the type of knife you intend to sharpen. Wide blades, such as jointer or planer knives, will require the sliding support. To sharpen chisel blades or other narrower blades – like those found on smaller block planes – you will want to attach the stationary clamps as described above.
Wide Knives
Let’s begin by looking at the operation for sharp- ening planer and jointer blades. The two most important factors that determine the level of suc- cess are bevel angle and alignment between the knife and grinding surface. Make sure all adjust- ments are done with the machine unplugged.
To set up your Model G2790 to handle wide knives:
1.Remove the sliding support from the work plate.
2.Loosen the lock knobs that attach the knife lock plate to the sliding knife support and remove the plate.
3.Place the knife, bevel down on the sliding knife support as shown in Figure 5.
4.Turn height adjustment knobs until the knife is sitting square on the knife support. (For the best results, make sure the knife is centered on the support. If the knife you intend to sharpen is too short to reach across all three of the inside adjusters, off- set the knife so it is centered on two adjusters – note dotted lines on Figure 5.
5.Once the knife is in place and evenly adjusted, replace the knife lock plate and tighten the adjusting knobs.
6.Turn the sliding support assembly over. The bottom of the support is beveled. Adjust the knife with the height adjustment knobs so the knife bevel extends slightly beyond the bevel of the sliding support mechanism. Making adjustments may require loosening the knife lock knobs. Once again, be sure the blade is adjusted evenly from side to side.
G2790 Universal Knife Grinder