3 Important Reasons for Wood Warping
When using a band saw blade to cut logs, wood warping can occur for a variety of reasons, especially if the logs are larger. In this article, we will discuss what may cause sawn lumber to warp and what we should do about it.
First, if the wood is warping due to the band saw: we need to check the following two parts of the band saw: the tensioner and the saw wheel.
If the machine's tensioning device is not working properly and is too light, it will cause the lumber to buckle. If this occurs, adding weight and adjusting the tensioner may resolve the problem.
If there is no problem with the tensioning device, then we need to proceed to the next step and check the wear degree of the saw wheel rim surface of the band saw machine. If the saw wheel diameter is inconsistent due to wear, the wood will also warp. This treatment method is very simple, just grind the saw wheel rim surface.
If we check the machine's tensioner and saw wheel and find no problems, then we need to consider whether the saw blade is causing the wood to warp.
When considering the bending of wood caused by the saw blade, you can check from the following two points:
First, the tooth shape of the band saw blade is incorrect or the tooth chamber is too small, and the saw blade is narrow and biased, which will cause the wood to bend. In this case, it is necessary to modify the tooth shape of the band saw blade, increase the tooth chamber, or replace the band saw blade with a larger saw diameter.
The second is that the band saw blade tension is uneven. The saw blade becomes loose during operation, which may also cause the sawn wood to bend. In this case, just adjust the saw blade tension to the appropriate range.
After problems with the machine and saw blade have been ruled out, warping of the wood due to operational reasons should also be considered.
First, if the feed speed is too fast and uneven during the operation, it will also cause the sawn wood to warp. Therefore, when sawing wood, the feed should be kept steady and the feed should be slow when encountering knots.
Secondly, if the saw wheel and blade are stained with resin sawdust, causing the band saw blade to jam during operation, the wood may also bend. If the saw wheel and saw blade are stained with foreign matter, they need to be removed immediately.
Finally, a band saw blade with dull teeth or a defective blade can also cause the wood being cut to warp. If the saw teeth are dull, they need to be sharpened in time, and the working time of the band saw blade should be reasonably arranged according to the hardness of the wood to avoid using it for too long; at the same time, avoid using inferior saw blades for cutting.
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