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Thread: This looks wrong...
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5th April 2020, 05:07 PM #1Woodturner with a shed
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This looks wrong...
I've bought a second-hand Rexon RBS-12A band saw and while everything looks to be in pretty good condition I'm concerned about how the blade is positioned on the wheels (see pics).
The blade is running higher than the sides of the wheels. Almost as if they're either a very thick tyre there or one on top of another.
Is this safe?
I'm worried if a ham fisted operator (me) was adjusting something out just in normal operation it might come off in a big way.
Any suggestions?
Cheers
Redbeard
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Cheers
Redbeard
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5th April 2020 05:07 PM # ADSGoogle Adsense Advertisement
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5th April 2020, 06:13 PM #2
The tyre looks OK, it should be slightly crowned. The blade should be sitting in the middle of the crown. You can adjust it by first, setting the blade at the correct tension and moving all the blade guides away from the blade, then loosening the locking handle and turning the top wheel adjuster at the back of the top case. Turn the top wheel by hand as you do this, and you should see the tilt of the wheel change and the blade move. Once you have the wheel centred, close the top case and let the saw run for a few seconds. Switch it off and check the position of the blade. Once it's right, you can reset the guides.
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5th April 2020, 08:52 PM #3Woodturner with a shed
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5th April 2020, 08:59 PM #4GOLD MEMBER
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Just adjust the top wheel tracking , as explained in post above perfectly
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5th April 2020, 09:32 PM #5Woodturner with a shed
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I'm new to bandsaws so it's softly softly to start. That blade is being replaced first for something a bit more robust and less like a hacksaw.
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Cheers
Redbeard
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5th April 2020, 09:55 PM #6GOLD MEMBER
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Have a look at this - YouTube - Alex Snodgrass is the bandsaw guru.
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5th April 2020, 10:13 PM #7
Alex’s method is to set the back of the tooth gullet in the centre of the wheel, not to centre the blade to the wheel. I was a bit dubious at first but gave it a try and am now a convert. My generic cast iron framed unit is set this way as are the three pressed steel framed units at the Bundaberg Woodworkers Guild; I get no drift and clean cuts. After changing or resetting the blade my acid test is to slice off a 1mm thick veneer off of a ~4”-5” wide board at the outer edge, not the face against the fence.
Nothing succeeds like a budgie without a beak.
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5th April 2020, 10:32 PM #8Woodturner with a shed
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That looks really quite simple, even a mug like me should be able to sort that out.
Thanks fellers.
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Cheers
Redbeard
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5th April 2020, 10:36 PM #9
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6th April 2020, 04:39 AM #10Senior Member
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Those tires look flat to me?
If so, the setup looks good for flat tires,
You could clean them along with your blade with a bit of a scrape as resin/pitch can cause issues.
Tom
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7th April 2020, 06:25 PM #11
the Alex Snodrass vid was great, i have a 20 yo carbatec 14 in machine , my mantra was the top and bottom wheel had to be co planer,like a straight edge over both wheels , on mine that put the the gullet well forward,but that was my best advice or so I thought, did a tune up according to Alex , smoother and cleaner on an old machine, like his blade tension, , thanks for the post
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10th April 2020, 08:19 AM #12SENIOR MEMBER
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I agree I have done as Alex suggested and have the blade tracking as mentioned and have no drift and can cut 2mm slices no problem.
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10th April 2020, 02:18 PM #13
As a side issue, where is the best place to buy new tyres for a 14"band saw?
The person who never made a mistake never made anything
Cheers
Ray
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10th April 2020, 06:41 PM #14
I bought genuine Carter polyurethane tyres from Gregs Machinery but there are generic orange poly tyres available on Fleabay etc at around half the price.
Nothing succeeds like a budgie without a beak.
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10th April 2020, 06:53 PM #15
Thanks for that CT
The person who never made a mistake never made anything
Cheers
Ray
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