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Фрагмент инструкции
A good rule of thumb when sanding with grits finer than 80 is lower the drum so that it contacts with work piece but still can be rotated by hand. When using grits coarser than 80 grit, you can lower the drum slightly more. However, a combination of several variables will determine the proper depth of cut to use, including the following: • Abrasive type and grit size. • Width of the piece being processed. • Hardness of the piece. • Feed rate of stock. Establishing the Proper Drum Height To establish the proper drum height, place the board to be sanded under the drum and lower the drum to the board thickness. Note: Sanding drum should still rotate by hand. Without changing drum height, finish feeding the stock under the sander. Start sanding drum and sand the board at that same position. 12 Selecting SANDSMART™ Feed Rates Begin experimenting with the feed rate set at about 40%-50% of maximum. The best feed rate will depend on a number of factors, including type of stock, grit and depth of cut used, and whether the stock is feed directly in- line with the conveyor bed or at an angle. If a “ripple effect” or inconsistent finish is observed, slow down the feed rate. If the finish is smooth and consistent and the sander is not overworking, experiment using a faster feed rate. The SandSmart control (A, Fig. 15) continuously monitors the load on the drum motor, and automatically regulates the speed of the conveyor motor to maintain the highest feed rate without overload. If the load on the drum motor increases, the SandSmart control will decrease the conveyor feed rate and will stop the conveyor under extreme conditions. If the load on the drum decreases, the SandSmart control will increase the feed rate but will not increase it faster than the manual setting on the switch dial. The best and most consistent finish will be achieved if the conveyor does not change speed during operation. When the “red” indicator light (B, Fig. 15) comes on, the SandSmart control has detected too great a depth of cut and/or too fast a feed rate. This change in conveyor speed may affect the finish surface. If the finish is affected, make another sanding pass without changing any settings. If the finish is still affected, make adjustments by slowing the conveyor and/or decreasing the depth of cut and run the stock through again. Abrasives The abrasive material you choose will have a substantial effect on the performance of your sander. Variations in paper type, weight, coating, and durability all contribute to achieving your desired finish. For the best sanding results, Performax offers premium abrasives that have been tested and certified for lowest overall cost and maximum performance. Genuine Performax abrasives are available in pre-cut “Ready- to-Wrap” lengths or in the convenient pre-marked “Ready-to-Cut” box. Selecting Drum Abrasives It is important to select the proper grit of abrasives for the type of sanding being performed to achieve maximum sanding results. As with any sanding operation, first begin sanding with coarser grit, depending on the roughness of the stock, or the amount of stock to be removed. Then progressively work toward finer grits. The chart below shows the general uses for the various grits. Performax offers strip rolls in the eight different abrasive grits shown. Grit Common Application 24 Grit Abrasive planing, surfacing rough- sawn boards, maximum stock removal, glue removal. 36 Grit Abrasive planing, surfacing rough sawn boards, maximum stock removal, glue removal. 50 Grit 60 Grit Surfacing and dimensioning boards, truing warped boards 80 Grit Surfacing, light dimensioning, removing planer ripples. 100 Grit Light surfacing, removing light planer ripples. 120 Grit Light surfacing, minimal stock removal. 150 Grit Finish sanding, minimal stock removal. 180 Grit Finish sanding only, not for stock removal. 220 Grit Finish sanding only, not for stock removal. 13 Selecting Abrasive Grits at the proper angle to the face before the sanding process. When edge sanding stock that The amount of stock to be removed is a major consideration when choosing the grit grade to start with. Grits of 24, 36, 50, 60 and 80 are primarily designed for stock removal. Grits 24 and 36 will remove the most material in one pass, whether you are doing abrasive planning, cleaning up glued panels, or flattening stock. Grits from 100 through 220 are primarily finishing grits designed to remove the scratch pattern from the previous grit used. For best results, never skip more than one grit grade when progressing through a sanding sequence. For fine work, such as furniture, try not to skip any grit grades during the sanding process. In general, premium quality abrasives such as genuine Performax abrasives will produce a better finish with a less noticeable scratch pattern. Note: Grits that are too fine can sometimes burnish the wood and leave a glossy surface that will not accept stains evenly. This will vary by type of wood. Oak, for exampl...
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