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+-- Thread: Bandsaw blade - switched to 3/16" blade - Wont track.. (/showthread.php?tid=7333122)
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - mdhills - 09-10-2017
why would too much tension worsen tracking?
Matt
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - Strokes77 - 09-10-2017
I don't know. I just couldn't get the blade to ride in the center of top wheel. No matter now I adjusted the tilt... But by backing the tension off, I was able to adjust it as normal.
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - JosephP - 09-10-2017
Pretty sure too much tension takes the wheels off of their common plane.
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - Alan S - 09-11-2017
I have seen the behavior mentioned by the OP, but only with 1/8" blades.
The problem may be that narrow blades can stretch with too much tension, to the extent they run off the crown of the wheel to relieve that stretch. Proper tracking depends on one edge of the band being tighter than the other as it runs off the center. https://woodgears.ca/bandsaw/crowned_pulleys.html
If the overall band stretch significantly outweighs that difference, it may no longer track properly.
Deflecting the wheels out of planarity is likely to happen more with wider blades. In my experience, coplanarity of wheels matters more with wider blades, which makes sense as narrow blades are so easy to twist. If you correct coplanarity of wheels, I'd do it with my widest blade properly tensioned, and not worry about it for narrow blades.
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - Strokes77 - 09-11-2017
(09-11-2017, 10:21 AM)Alan S Wrote: I have seen the behavior mentioned by the OP, but only with 1/8" blades.
The problem may be that narrow blades can stretch with too much tension, to the extent they run off the crown of the wheel to relieve that stretch. Proper tracking depends on one edge of the band being tighter than the other as it runs off the center. https://woodgears.ca/bandsaw/crowned_pulleys.html
If the overall band stretch significantly outweighs that difference, it may no longer track properly.
Deflecting the wheels out of planarity is likely to happen more with wider blades. In my experience, coplanarity of wheels matters more with wider blades, which makes sense as narrow blades are so easy to twist. If you correct coplanarity of wheels, I'd do it with my widest blade properly tensioned, and not worry about it for narrow blades.
This, I believe, is exactly what I was experiencing. Thank you guys for helping me. The blade in question was an "Olson 3/16" 10tpi blade. And I had forgotten to adjust the tension from the 1/2" blade I had on before... So it was entirely too much for the blade.
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - JGrout - 09-11-2017
(09-11-2017, 12:18 PM)Strokes77 Wrote: This, I believe, is exactly what I was experiencing. Thank you guys for helping me. The blade in question was an "Olson 3/16" 10tpi blade. And I had forgotten to adjust the tension from the 1/2" blade I had on before... So it was entirely too much for the blade.
good thing it was a narrow blade. I would have liked to been a fly in the corner watching you wrap that blade on without removing/reducing the tension first.
glad it worked out
Joe
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - Strokes77 - 09-11-2017
(09-11-2017, 12:43 PM)JGrout Wrote: good thing it was a narrow blade. I would have liked to been a fly in the corner watching you wrap that blade on without removing/reducing the tension first.
glad it worked out
Joe
This saw has a lever... so I flipped the lever.. ;0
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - JGrout - 09-11-2017
(09-11-2017, 01:49 PM)Strokes77 Wrote: This saw has a lever... so I flipped the lever.. ;0
I knew there was a good reason to dislike those levers
you just cemented it
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - Bøb - 09-13-2017
(09-09-2017, 03:18 PM)JosephP Wrote: Are the wheels coplanar?
They don't need to be ... that is another w.w. myth !!
https://www.youtube.com/watch?v=bxVyKsbuwZQ
RE: Bandsaw blade - switched to 3/16" blade - Wont track.. - Mike in kc - 09-17-2017
Maybe it's just time for new tires?