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derosa's picture

I am trying to correct some vibration in my 14'' Delta bandsaw . I checked the tires and wheels with a dial indicator. I found that the tires, which are in good shape, varied 15/1000 of an inch. I also checked just the wheels, and those varied 10/1000 of an inch. any advise how to correct this. I have already made a heavy wood stand, switched to cast iron pulleys, link drive belt, 1.5 hp motor, timber wolf blade, and carter guides, check for coplanar to improve it's performance. Is it worth all this effort trying to upgrade this platform, or should I upgrade to a steel framed( Laguna, Griz, Rikon) saw? I have not been a heavy bandsaw user, but would like to get more into reswing, and making my own veeners. Any advice?

RalphBarker's picture

V-v-vibrations of the ungood kind (post #170964, reply #1 of 10)

Having a wheel surface variation of 0.010 strikes me as excessive, but you might want to call Delta customer service about that.

To correct the problem, I'd first clean the wheels with naptha to be sure the variation is not simply some gunk on the wheel. If not,  I'd mark the beginning and end of the area on the wheel that is "out" with a felt-tip pen and then carefully (dry) sand that area with 200 grit wet/dry paper on a block of wood - assuming it's a bump, not a dip. Recheck with your dial indicator frequently, so you don't make the problem worse.

The 14" Delta has limited resaw capabilities, though - about 6" as I recall. So the question of how much effort to put into the saw is up to you. If the primary use of the bandsaw is resawing, you might decide you need a larger saw with greater resaw capacity. But, even then, correcting the problem on your current saw will make you feel better when you sell it. (Good Karma, and all that.)

surfside123's picture

  I think you should check (post #170964, reply #2 of 10)

 

I think you should check the link belt you are using. 
All the upgrades you did for resawing is perfect. I was thinking maybe you chose  Euro guides
but Carter is fine.  
 
 
 
Bart 
www.bandsawblog.com
PeteBradley's picture

Start with the basics (post #170964, reply #3 of 10)

No offense, but it's ridiculous to put a dial indicator on a band saw tire. 


Can you describe the vibration in more detail?  How does it affect your use of the the saw?  Table shakes?  Band moves?

If you haven't already, try running the saw without the band, then without the belt to see if you can isolate the source of the vibration.  Check also that your pulleys are coplanar.  Be aware that some "upgrades" marketed to hobbyists are of poor quality and no better than what they replace.  You mention a wood stand, it could be it's reinforcing a vibration, try testing it with a big sandbag in it if you can.


I recommend you get more experience using the machine you have.  That will help you to know what features you really care about *in use*, which will help a lot in selecting your machine when you move up.

hackmeister's picture

The wheels on a 14 inch Delta (post #170964, reply #4 of 10)

The wheels on a 14 inch Delta don't turn particularly fast, I would be quite surprised (astounded actually) if .015 of runout caused a severe vibration.  The tool will normally produce small vibrations, but not enought to significanly affect the work.  

As another poster said, .010 is a fair bit of runout on a bandsaw wheel, more than I would expect on a Delta.  To be clear, are you refering to side to side runout, or out of round?  I could see side to side causing some vibration, the culprit could be a bad bearing or maybe the wheel not set right.  it also could be caused by deflecting the machine while turning the wheel; check to see if the .010 is always in the same place.  Unless the machine is really old or the wheel has been abused, the wheels should be in good shape.  Mine are quite well balanced.

As recommended, to isolate the cause, take the belt and the blade off and clean the sawdust and pitch off of everything.  Spin each wheel by hand (be careful doing this, they can eat fingers) and see if they flutter or run smooth.  If they are good, start at the motor and run it with only the pulley on.  If it vibrates take off the pulley, and you will know if it is the motor or pulley.  If it doesn't vibrate, put the belt on.  If it vibrates, change the belt tension a smidge and see if it gets better or worse.  If it doesn't change or there is no vibration, put the blade on.  Carefully run it with the door open and look if anything is vibrating.  You can also change the blade tension up and down and see if that affects it.

Finally, a bandsaw will always give a slightly rough cut, not like the smooth cut of a good table saw blade.  I think this is due to the pointy set of the teeth in combination with the slower speed of the blade.

9michael9's picture

Check your motor and its (post #170964, reply #5 of 10)

Check your motor and its belt.

derosa's picture

I improved the vibration (post #170964, reply #6 of 10)

I improved the vibration issue on my saw, by truing up my tires with a sharp chisel, resting on a block of wood clamped to the housing, serving as a tool rest. I then had my spouse spin the upper wheel with hand power (with the blade off). I slowly advanced the chisel taking very light cuts, while maintaing the tires crown.

 Even after all of the tune up this saw has gone through, I have decided to go big with a new saw. This is just an example of spending alot of $ and effort trying to make a lesser saw into someting I really wanted in the first place, ( Laguna) and still coming up far short. 

sid works's picture

many things (post #170964, reply #7 of 10)

can cause the problem. the Delta 14" bandsaw  was not built to be a precision machine. no bandsaw is. you didn't say how many miles are on this b/saw(how old and how many owners?). the 14" delta has been in service for many years, vibration would only come from certain areas, a 0.010-.015" variation on a rubber tire(bet you could find a variation of thickness in a condom if you had the measuring device) or wheels. could be a bad weld or kinked blade. could be the bearings in the wheels or electric motor or in alignment of the motor drive belt or the motor pulley loose. the could be some bolts loose. could even be not sitting squarely on the floor

ron

surfside123's picture

I got this blog in the (post #170964, reply #8 of 10)

I got this blog in the internet : http://bandsawblog.com/what-would-be-the-possible-reasons-why-a-band-saw-is-noisy/  . You may want to read it. 

derosa's picture

The saw is fairly new, a ten (post #170964, reply #10 of 10)

The saw is fairly new, a ten year old Delta, I rechecked everything on the saw. The cast aluminum wheels were out of round. Truing up the tires with a chisel helped out a bit. I have since placed that saw with a new home. I still have my older, small INCA saw which runs very smooth(a high standard for a tool). I am now looking for replacement for the Delta, which will have a larger resaw capacity.