I recently purchased a JET 18″ bandsaw. It is my first bandsaw so I am getting familiar with it’s uses and limitations. One issue I noticed is that when I resaw wider boards (6 to 10″) the saw seemd to move back and forth in time with the blade. At first I thought the problem could be related to the cold temperatures affecting the belt connecting the motor to the wheel. The more I think about it though I am suspect of the condition of the blade (dull?, teeth not set properly?). The blade is a timberwolf 3/4″ 3tpi with only a 100 or so linear feet run through it. Any ideas?
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Replies
This won't be any help, but I had the exact same problem with the same exact blade on my old 14" saw. Never did figure out why it was doing that. I suspected the weld, but not sure. I ended up trading up on the saw and now am still just using the blade that came on my Jet 16".
You bring up a good point. I still have the original blade that came with the saw. I'll put that on and give it a go. If I still wobble I'll know the timberwolf blade is not at fault. (unless of course both blade have the same problem....)
Tom,
There are a few things that might be causing you dilemma. All of which are fairly easy to correct.
Even though a new saw is "set up" by the factory, it really means that all of the pieces have been attached to each other in the right order, and set to fairly rough tolerances. It is rare indeed that any (new) machine will need absolutely no adjustments after it arrives to your shop.
Before doing any of the following, please unplug the saw!
Because the saw is new, and started to vibrate after 100 linear feet, the likely cause is that the pulley belt has been broken in and has stretched out a bit. (This is normal, all new belts, except the link belts do this.) The motor is mounted on sliding tracks. You will need to loosed the bolts and slide the motor down until the belt deflects only 1/2" when fingertip pressure is applied in the middle. When the motor is in position, use an indelible pen to mark the location of the motor. This will help to place the unit back to the correct setting if you ever have to move it.
Before you do tension the belt, and with the belt removed, lay a reliable straight edge on the inside edge of each pulley wheel. You are checking to make sure they are in perfect vertical alignment with each other. If they aren't, loosen the insert nut, shift and re-tighten. (It's always better to move the pulleys closer to the motor rather than away.)
This is the best place to start, and should eliminated the vibration problem. If not, please let me know, and I'll help you to correct this phantom. Or with any other question - please feel free.
Dan Kornfeld, Owner/President - Odyssey Wood Design, Inc.
Good tips. I'll check it out when I get back in the shop. I've been intrigued by the link belts since I read several glowing reports in this forum. Perhaps I'll look into them.
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