Popular Woodworking 2004-06 № 141, страница 58
enough that you don't feel like you're wasting your time. Also, while the machine is designed for sharpening tools with a flat edge, you can sharpen many carving tools freehand by resting them on the bar that the jig rides on. You also can sharpen the slightly cambered edge necessary for smoothing planes and jointer planes by alternately applying a little more pressure at the corners while grinding and honing. In use, the machine is almost foolproof. Because of its slower speed, it's difficult to build up the heat necessary to destroy the temper of the tool (though it's still possible). And the completed edge looks good and polished under magnification, much like a hand-sharpened edge. The Warrior from Jooltool The most unusual machine in this test is the American-made Warrior, a system that utilizes an optical illusion. Essentially, you sharpen your tools against a disc of spinning plastic covered in Trizact paper. The disc is shaped so that when it's spinning, you can see the tool's edge as it's being sharpened. Like the other two machines, the Warrior comes with a variety of grits so you can hone a fine edge. The base model comes with grits from #80 up to 10 micron, very similar to what's available on the other two machines. One downside to the base package is that it comes with only two of the plastic "backpads," which is what the sandpaper sticks to. It would be nice to have three or four to handle most woodworking tools. Additional backpads are available from Jooltool for $ 21 each, or you can buy a package of three for $42.50. Unlike the other two machines, the Warrior has no jig to hold the tool square as you sharpen it. However, it was surprisingly easy to keep a reasonably square edge This jig holds the tool This jig sets the projection of the tool Veritas Mk.II The Veritas Mk. II Power Sharpening System is designed to do one thing extraordinarily well: sharpen woodworking tools. Just set your tool in the jig with a second easy-to-use jig (right). while sharpening freehand. Where the tool really excelled was with shaping my carving tools. It is astonishingly simple to shape the edge the way you want because you can see exactly where you are removing metal. Another plus is that the Warrior tended to keep the edge cooler than the other two systems. We measured the heat generated by each system by holding a temperature sensor to the chisel (at 3/l6" behind the edge) and then sharpening the tool in three separate three-second pulses with a three-second pause between each pulse. With the Warrior, the temperature of the tool went up to 7 7 ° Fahrenheit on average, only 5° more than room temperature. Tools on the Jet heated up to 84°F and on the Veritas to 81°F. You still can destroy the temper of a tool with the Warrior, however. The delicate edge of V-tools - particularly where the two sides of the "V" meet - was susceptible to heating up. On the downside, the Warrior can't reliably remove the burr from the backside of your tool -that's something you'll have to do with a sharpening stone for Jooltool's Warrior The Warrior M-2000-PKG is a compact, lightweight sharpening system that allows you to see your tool's edge as you sharpen it. flat tools and a slipstone for curved tools. Also, the widest blade you can reliably sharpen with the Warrior is slightly smaller (about 23/8") than the tools the other two machines can sharpen. Another downside is the machine is lightweight, so you should screw it to a work surface to make sure you don't knock it over (holes Tool rest Set the bevel angle you want to sharpen with the Veritas system by adjusting the tool rest up and down. 56 Popular Woodworking June 2004 |
