Woodworker's Journal 1994-18-3, страница 13
It it passes the saw 's column, real throat capacity is typically slightly less than the w heel diameter. If the frame of a two wheel hand saw is like a regular C-elamp. the frame of a three w heel saw is like an extra deep tie-lamp The use of a third wheel allows throat capacity lo be increased beyond the diameter of the saw's wheels (Photo -t). However, keep in mind that the leverage created by locating wheels in this arrangement increases stress on the frame of the saw. I he Tracking Dilemma Except for the guides, a band saw's wheels and tires require more attention than any other pan of the saw. Here, we'll look at the common causes of tracking problems and the best solutions. PROBLEM #1: Out of Balance Wheels Wheels that are just a little out of balance can cause tracking problems. Using a band saw with unbalanced w heels is like driving a car with unbalanced tires. And. Ihe resulting v ibration produces ragged cuts. SOLUTION: To check band saw wheels for balance, remove the blade, give the wheel a spin, let it stop, and mark the part of the wheel that ends up at the bottom. If. after a few tries, the same pan of the wheel always ends up ai the bottom, then that's the heavy part of the wheel. On older saws, with heavy -duty construction, one way to balance a wheel was to remove metal from the heavy part bv drilling shallow (not through) holes inside the rim (Photo 5). However, with modern lighter-design saws, a better concept might be to add weight, as with balancing a car's w heel. This can be done by crimping lead weights onto the wheel, or even by simply wrapping a little copper w ire around an available spoke, until the wheel is balanced. PROBLEM #2: Out-of-Round and Unbalanced Drive Assemblies Oul of round and unbalanced drive pulleys, shafts and belts can cause vibration. The philosophy "if it ain't broke, don't fix it" does not apply to drive assemblies. A drive bell that isn't broken may still need living. SOLUTION: Worn or delaminaling belts should be replaced, as should bent Another breakthrough tool only from Garrett Wade... With 224 pages, our Free Catalog is probably the biggest in the business. We think it's the best, too. We have the woodworking supplies and tools that you just can't find in your local hardware store anymore. Everything from traditional old-style hand planes and saws to the very latest in power tools and accessories. We've got Measuring tools, Chisels, Carving tools, Turning tools, Sharpening tools, and much, much more. Plus half a dozen kinds of glue to hold your work together, 70 stains to color it, and 20 different top coats to protect it. Just send us the coupon below or call toll-free for your tree 1994 Garrett Wade Catalog — plus free supplements throughout the year. It could be just the cool your workshop needs. ^^oridng Our free 1994 Catalog. Garcal Wade Co.. tlx 161 Avenue ol the Amenta's Nc*- York, NV 10013. tVpi. 94? HOO-221-2942 Intarsia Patterns and Instructional media by world famous artist Judy Gale Roberts BOOK "Intarsia Patterns & Techniques" ... $19.95* (147 pages of professional Instructions with patterns) VIDEO "Intarsia Woodworking Basics".....$29.95* (VHS formal - 90 minutes of detailed Instruction) ,iV WOLF 16X15 44 pes Intarsia Patterns $5.95 ea. OR All 6 Patterns tor $30.00* 'Plus $5.00 Basic Shipping Charges (No KhStioiwI shipping lor imiltpi* Ittnwt) FREE CATALOG WITH OVER SO MORE PATTERNS WITH YOUR ORDER. CAT IN BAG 14 X 9 33 pes. ROSE 20X16 34 pes RACCOON 20X9 3Spcs TIGER 19 X 19 92 pes. CLOWN W/DAISIES 21 X 15 86 pes ORDER THESE A OTHER QUALITY SCROLL SA W PRODUCTS FROM: SEYCO "The Scroll Saw Specialist" BOX 472749 • Gariand, TX 75047-2749 1 (800)462-3353 L May/June I9M4 13 |
