Thread: Advice - SBW4300 "odd sound"

Its the hamster getting tired and falling over.


Al

Oz,

I got the upgraded version with the possum. He seems to be alive and kicking!.

Regards,
Mike.

Check for a loose wheel or shaft to start with.

A test worth doing is to take the blade off the wheel, remove the drive belt and spin the wheel. While freewheeling you should hear the bearing noise if it is a bearing.

Check the wheel for cracks!

Has your saw got the aluminium cast wheels or the heavy cast wheels?

It's a matter of elimination......one thing at a time, to get the cause.

Mike,
You don't say if the noise is a revolution of the wheel or the blade. The most likely source of the noise is from a defective joining weld or damaged blade. Noise has a way of transmitting to other parts of a machine so follow Joe's (Gatiep) advice and you should be able to itentify the source.
Don't be disheartened by a new machine having problems as a lot of us have had problems with the Chinese manufactured machines. Once corrected you should have long trouble free service.

I agree with rodm, it's probably a defective joint in the blade. This is not unlikely if you are still using the blade that came with the saw both of which were probably manufactured in China.
.
(It could also be something to do with the way you store your blade!! JOKE! .)

Your trouble may well be the weld but it may not be defective. If you have not had the saw for long I suggest that you check the setting of the top and bottom guides if they are wrongly set and too tight against the blade you well get a knock every time the weld passes through them. Check your hand book.

Frank

Gents,

Thanks for the replies. I'll do some investigation work and come back to you.

Regards,
Mike.

Gents,

The noise is definitely from the axle area of the main drive wheel. Here's what I did:
- loosened all of the guides so that there was no possibiility of touching the blade - still clunked
- disengaged the blade - still clunked
- disengaged the drive belt - stopped clunking :confused:
- renegaged the drive belt - started clunking :mad:
- disengaged the drive belt and swapped the bearings from each wheel - apparent success

5 minutes of use later, clunking starts again :eek:

So I called Carbatec and they thought that the wheels may be out of alignment. I'm not sure if this is the case because when I disengaged the blade, the clunking should have stopped, but it didn't. So I think that either:
- the drive wheel has a fault in it; or
- the axle has some fault.

Have I missed anything? Any advise is appreciated.

Regards,
Mike.

Might sound silly but check the belt closely, and also hand spin the bottom wheel without a belt. From experience some of the chinese/Taiwanese belts leave a lot to be desired.
Check the belt groove in the bottom wheel, may be a bit of junk stuck in it.
Like I said might sound silly but is surprising how small or simple a fault can be, and yet sound horrendous. I know, I've been there myself.

Check the pulleys for sideways movement and that they are securely attached to the shaft and motor. Also check the motor mountings and bolts for looseness.
Take the bearings out again and spin by hand. You will feel some roughness if they are faulty.
As it is a new machine I wouldn't do a lot more than this. Take it back to Carbatec and get them to fix or exchange.