Moderators: Random Orbital Bob, nev, CHJ, Noel, Charley

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By sunnybob
#1312950
Because of the fact that the blade is welded to keep tooth to tooth spacing even, if you have a different TPI count a blade can easily be 1 or 2 mm different in length from one to another. This is why (boring as it is) you have to go through the set up procedure every time you change a blade.

Youre right, stay well away from adjusting the lower wheel. I've heard multiple horror stories about that, and no good ones, and if it did work, leave it alone.
By Chris152
#1312962
It seems to be better but the blade still wants to wander somewhat - I'm finding if I keep the teeth slightly back from the crown on the top it pulls them back enough on the bottom wheel - not ideal but better than it was. No idea if it was the tension or overall setup or both. Advice gratefully received tho Sb, I think I've been getting lazy on account of doing so little that needs to be accurate and this little blade's highlighted bad practice. And I'll leave alignment of lower wheel well alone, I think user error is far and away the cause of most of my woodworking issues!

This escapade started as a result of snapping a 3/8 blade. I've been making these little reindeer that result in lots of v small pieces coming away, and I think one of them got tugged into the insert and jammed the blade.
Is it an option to make a simple, temporary zero clearance cover for the insert and table with a piece of 5mm ply, holes cut to allow for dust extraction and a single cut for the blade to run through? The ply would be big enough to act as the table top and would be double-side taped to the metal top.
By sunnybob
#1312979
zero clearance inserts and or table covers are fine. The blade will chew its way through though as you turn corners, so be prepared to replace them fairly often
By Chris152
#1313039
All seem tight Tom. It's working fine at the moment. One thing I've noticed is that as I pull the wood back through the cut (on the reindeer I'm making, lots of retracing through the cut line to start from another angle) I'm often pulling the blade forward, which can't help. Once I've done enough of these I'll put a bigger blade back on and go back to cutting blanks!
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By CHJ
#1313062
On the blade clearance when exiting a cut, could you work with a blade with increased kerf? this would give you more clearance.

One other thing, I've come across bandsaws having excessive front to back play in location of the wheels on the shaft, placing a suitable washer on the shaft behind or in front of the wheel has stopped the wheel from sliding along the shaft.
(fitting spacing washers does not alter or need shaft alignment changes) worth a check with blade released just in case.
By Chris152
#1313091
CHJ wrote:On the blade clearance when exiting a cut, could you work with a blade with increased kerf? this would give you more clearance.

One other thing, I've come across bandsaws having excessive front to back play in location of the wheels on the shaft, placing a suitable washer on the shaft behind or in front of the wheel has stopped the wheel from sliding along the shaft.
(fitting spacing washers does not alter or need shaft alignment changes) worth a check with blade released just in case.

I could use a blade with wider kerf, hadn't thought of that. As it is, I've found the best way with the blade I have is to use a very light touch with just a couple of fingers on the piece, allowing the back of the blade to find its own way back through the cut. I'll stick with it for now, I only plan to make a few more of these things.
And I'll take another look at the wheels to see if there's any front to back play - I have tried but maybe worth another look. Thanks Chas.
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By Jacob
#1313134
Chris152 wrote:All seem tight Tom. It's working fine at the moment. One thing I've noticed is that as I pull the wood back through the cut (on the reindeer I'm making, lots of retracing through the cut line to start from another angle) I'm often pulling the blade forward, which can't help.....
On a complicated shape reversing out may be difficult to impossible, with any blade. The usual thing is to cut out and then cut back in - always going in same direction, never trying to reverse.
Tension sounds slack as well.
PS Complicated shapes - might help to do preliminary straight cuts in from the edge to the pattern, which you can reverse out of. Then when you get to it following the pattern, a piece drops out
By Chris152
#1313253
Jacob wrote:
Chris152 wrote:All seem tight Tom. It's working fine at the moment. One thing I've noticed is that as I pull the wood back through the cut (on the reindeer I'm making, lots of retracing through the cut line to start from another angle) I'm often pulling the blade forward, which can't help.....
On a complicated shape reversing out may be difficult to impossible, with any blade. The usual thing is to cut out and then cut back in - always going in same direction, never trying to reverse.
Tension sounds slack as well.
PS Complicated shapes - might help to do preliminary straight cuts in from the edge to the pattern, which you can reverse out of. Then when you get to it following the pattern, a piece drops out

One of the problems with the reindeer I'm doing (Matthias's design) is that on the second set of cuts, you have to leave substantial parts of the excess attached by a little as the three layers are held together by nails driven through them - if you cut those sections out it falls apart and you lose the template. I accidentally did that on my first go thinking it'd be easier to remove sections cutting straight in from the side and ended up having to hold it together by hand. But general principles understood - thanks.

Sb - that guide looks brilliant but not worth it for now (80USD) - and I searched but couldn't find it in the UK. But it was good to watch, I'm upping my pace a little after that. :-)
By sunnybob
#1313277
Chris, it was more about the reindeer than the guide. I suspect Jacob has never seen one before :roll: :roll: (hammer)
One member here (at least) bought the carter single wheel, but was not all that impressed with it.
I just might try a reindeer this year. :shock: :D
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By Jacob
#1313442
sunnybob wrote:Chris, it was more about the reindeer than the guide. I suspect Jacob has never seen one before :roll: :roll: (hammer) ....
Had a look. Yep never seen one before!
But isn't a strategy to avoid backing out of a cut still worth looking at?