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  1. #16
    Join Date
    Apr 2017
    Location
    Éire
    Age
    39
    Posts
    300

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    Hello again
    The photo of the Tas oak suggests that there could be some improvements made to your setup,
    you shouldn't get that speclhing on the underside of the cut,
    Whether that's due to you're fence not being parallel with the blade, or other things like machine setup
    which is worth checking, that is...
    if the blade is actually tensioned adequately, and the tracking where it should be, then something is at fault.

    Might get a better impression if we Knew if the speclhing was on both sides of the cut, and if the scallops are too.
    Scallops on both sides would indicate that you're pushing too hard, and the blade is getting deflected.
    One solution is slowing down, which you seem to be gravitating towards,
    Could see if spelching was present on the cut from the other side of the blade.

    If so, then change for a different manufacturer to see if the saw cuts better.
    If it still happens, then that might suggest tension is not adequate.

    The spelching/blowout is what you should be looking into removing out of the equation first.
    It could suggest something else like your alignment/yaw being out.
    For the sake of your motor bearings, be careful to make sure your pulley lines up with any adjustment you make,
    should you need to go near bottom wheel.

    How does it run with your widest suitable blade, can you run it without any guides making contact,
    is there wobbling in either orientation, like flutter or mimicking what a bad blade weld would do?

    I'd guess the former for that spelching, but only if I knew the blade was actually tensioned correctly, and there was that result on both sides of the cut.
    That the tires were true with an even dust track on the camber at the very least.

    Might be worth seeing for any viberation without a blade installed, so you could see if you're lower wheel is not wobbling from being misaligned with motor, possibly more noticeable when stopping the machine.
    Might not be an issue with a smaller machine, but I'd want to know, should the belt was too tight for any possible misalignments, so another thing to check should you want the best results.

    Tom

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  3. #17
    Join Date
    Feb 2014
    Location
    Bne
    Posts
    383

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    Alex Snodgrass is well known in bandsaw circles.


    Band Saw Clinic with Alex Snodgrass - YouTube


    30-Minute Bandsaw Rehab with Alex Snodgrass - YouTube


    Mark Duginski i also found helpful too
    Last edited by tomartomau; 31st October 2021 at 12:28 AM. Reason: add info

  4. #18
    Join Date
    Oct 2021
    Location
    Willetton, Western Australia
    Age
    66
    Posts
    70

    Default

    A bit of an update - have been playing around a bit on this with the 6TPI blade.

    13mm is probably the widest I can practically use on this bandsaw- the handbook says 19mm is the max but as the tyres are not much wider than this i haven't been game yet to try the 19mm; centring the gullets on the crown leaves the rear of the blade hanging over the edge of the wheel.

    Anyway, reviewing the set up with the current blade I found the tension was a bit tight, so backed it off a tad. Now trying the saw with no load, I immediately heard a difference; it was clear the tension was way, way off. Tried a short rip of a scrap of pine; feeding it at a rate that did not introduce excessive load on the blade, the difference was remarkable.

    The pencil line is a highlighted marker line referenced from the top edge in the picture .. so I can assess any drift...looks like there is none . there wasn't any before but I wanted to make sure I did not reintroduce any after adjusting the tension. You can also see a marked improvement on the cut line.


    A couple of light tickles with my 'new' favourite plane finished off the edge nicely....




    I can easily live with those results, although I might invest in a new 3TPI blade for longer rips

    Thanks for all the feedback and suggestions - I did read them all.

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