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Thread: Bandsaw tuning question

  1. #1
    Join Date
    Feb 2007
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    Bandsaw tuning question

    Iím the Ņhappy? owner of a bandsaw since March this year, so my experience in tuning it up is null, Iíve researched and bought a couple of books related with the subject and got some good tips from them.

    So in order to get acquainted with it I performed several self training routines such as changing the blade, adjusting the guides, resawing stock etc. but now Iím experiencing a problem that I donít know how to tackle.

    When cutting thick stuff (about 3 inches) the saw makes a high pitch noise really disturbing that didnít make before, this noise dissapears if I push harder. Some times makes it sometimes doesnít. May it be blade wear? I do not think to have cut so much in order to have worn out the blade already.

    Iíve checked everything and the only thing Iíve been able to find is that the lower wheel is not on the same plane as the top one, they are parallel but while the blade runs on the center of the top wheel it is runing near the outer rim of the lower one.

    As I hadnít touched the position of the lower wheel at all I wonder why this sound is appearing now, and not from the very beginning the saw was surprisingly quite noiseless even when cutting thick stock.

    Any hint?

    Thanks in advance
    Best regards,
    Toni

    __________________________________________________ __________________________________________________ _________________
    web site:http://www.toniciuraneta.com
    I also dream of a shop with north light where my hands can be busy, my soul rest and my mind wander...

  2. #2
    Join Date
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    Toni, you didn't say what kind of bandsaw or size and pitch blade you are using so I can only guess where the sound is coming from. If you have the Euro style blade guides, could it be coming from one of the Thrust Bearings? Also it could be coming from the blade itself, so you might try spraying one of the non stick cooking sprays on the blade while it is cutting and see if the sound goes away, (some here, including me, use a product called "PAM" cooking spray for this and it will not affect finishing products). Does your saw have flat or crowned tires? On flat tire saws, the narrow blades don't always run at the same place on the upper and lower wheels.

    To pin down the area the sound is coming from, get a length of rubber or plastic tubing and get someone to hold one end to your ear (while you are cutting), and then move the other end of the tubing around to different places around the blade and guides and elsewhere that the sound seems to be coming from to locate the origin of the noise. Without more information, this is all I can think of right now. Let us know what you find.

  3. #3
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    Thanks Norman.

    I knew that the information I was providing was rather short, I'll gather all the info and get some pictures as well so it helps.

    The trick for finding where the noise comes is great! It would have never occurred to me.

    My saw has crowned tyres, it is a Metabo 505-G but this may not make any sense to you as it is a German brand that may not be sold in US.


    Best regards
    Best regards,
    Toni

    __________________________________________________ __________________________________________________ _________________
    web site:http://www.toniciuraneta.com
    I also dream of a shop with north light where my hands can be busy, my soul rest and my mind wander...

  4. #4
    Join Date
    Oct 2006
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    29,079
    Nice saw, Toni. I have noticed an occasional high pitched sound on my bandsaw that seemed to only happen with certain wood species. Are you hearing the sound on all thick wood, regardless of species, or just one type of wood?
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  5. #5
    Join Date
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    ozarks
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    toni,
    if the noise you`re hearing isn`t a metal on metal or bearing noise i`d just ignore it....depending on the blade and wood sometimes a bandsaw will make some awfull noises........especially if you do like me and keep pushing a dull blade `cause you`re either too lazy or too cheap to change it
    lookin` at the pic vaughn linked to i`d say you`ve got a good saw that`ll push a dull blade with no problem....for thinner stuff (less than 6-8") just keep using it untill the cut quality suffers or it breaks....bandsaw blades are like drill bits and router bits, they can be sharpened, but why? new ones are usually less money than sharpening if you figure traveling to the sharpener to drop `em off and then pick `em up.....blades for my 16" saw are 11 bucks u.s.delivered to my door.
    tod
    [SIZE="1"] associated with several importers and manufacturers.[/SIZE]

  6. #6
    Join Date
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    Is this the saw Toni?

    Attachment 12269

    Looks very much like the Rikon 14" saw.

    I have to say, that I was going to say what Tod said, but he beat me to it, so not much more to say

    If it is a metal on metal noise, check, to see if the teeth of the blade are hitting the edge of the lower wheel, if they are, you are going to need to get the two wheels in better alignment, this can often be done by putting a washer on the shaft of a wheel between the wheel and the bearing.

    Good luck, when you get that saw tuned up and running nice, you will enjoy using it even more!

    Oh yeah.............. where are the pics......
    The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
    William Arthur Ward

  7. #7
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    Vaughn: Thanks for your input, yes the saw is the one that from your link.(How I didn't think about it) So far the two kinds of wood that I've sawn are cheap pine wood salvaged from packaging and maple, (here they do not differentiate between hard and soft maple, at least to my limited knowledge of lumber suppliers). As I can't recall cutting thick pine recently I can't tell. I'll cut a scrap and come back to you.

    Tod: You're a a well of knowledge, thanks for your input, I was afraid of having messed it up playing around with the saw. I'll recheck the sound to realy find out if it is metal against metal or not.

    Stu: Yes, this is the saw, for an amateur like me I think is enough ( as a start) of course it is not like your Phonenix but it is proving to be a real aid, it is really rewarding to see that one can cut stock and getting the pieces almost to exact size so fast, and start doing fine work without so much hard work before.
    Wait for the pics tomorrow.
    Best regards,
    Toni

    __________________________________________________ __________________________________________________ _________________
    web site:http://www.toniciuraneta.com
    I also dream of a shop with north light where my hands can be busy, my soul rest and my mind wander...

  8. #8
    Toni, I had the smaller brother to yours (the 315) and it made some dreadful noises at different times but always cut just fine. Most times getting a bit of lube on the blade or guides made d ifference. If the tone changes with lubrication then you just have an unfortunate resonance with the blade/timber/machine combination. Get some good ear defenders and keep cutting.

    I'm delighted to learn that my attitude to bandsaw blades is the same as tods - push it till it breaks or refuses to cut. I always assumed that I was being a bit reckless but now....

  9. #9
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    Quote Originally Posted by Ian Barley View Post
    Most times getting a bit of lube on the blade or guides made d ifference.
    Hi Ian.

    Lube on the blade?? Wouldn't it make it to slip as well on the wheels?? I've put lube on my hand saw when cutting certain types of wood to ease the job but I'm afraid of loosing power due to slipage of the blade on the wheels.
    Is it a common practice? As you can see I'm an absolute beginner as far as bandsaws are concerned.
    Best regards,
    Toni

    __________________________________________________ __________________________________________________ _________________
    web site:http://www.toniciuraneta.com
    I also dream of a shop with north light where my hands can be busy, my soul rest and my mind wander...

  10. #10
    Quote Originally Posted by Toni Ciuraneta View Post
    Hi Ian.

    Lube on the blade?? Wouldn't it make it to slip as well on the wheels?? ...
    I suppose it is technically possible but I have never had it happen. Taking the model number I would guess that your saw uses 50cm (19") wheels or thereabouts. That means that the blade has approx 150cm (60") of contact surface with the wheels and about 75cm of friction surface with the driven wheel. You would need to get quite a lot of lube on the blade to make that slip.

    I use a PTFE spray which does the same job as the non-stick spray that Norman talks about in his first post. In your case the main reason is that if a quick squirt of lube on the blade changes the sound then the only thing that you have changed is the friction between the blade, its guides and the wood. If that is the case then your noise occurs because of the resonance between those elements. If the noise doesn't change then you may have something else to find. I am pretty sure that the noise will change. It won't go away but it will change its pitch.

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