Thread: bandsaw stopped, blade sharpening

Harry,
sounds like the starting capacitor might be cactus (highly technical term for broken )

Mick

Nothing to do with starting caps etc. Do you have a magnetic switch?
I thought so. It is mounted upside down and the problem is sawdust collecting in the switch. take the switch apart, clean the switch and replace it UPSIDE DOWN. This will almost certainly fix the problem.

The pulley isn't slipping on the motor is it. DAMHIK.

As advised by Mick and bob there is 2 possibilities Either the centrifugal switch on the motor has become clogged with saw dust or the capacitor is faulty. Easy one first take the end cover of the motor to expose the switch and give it a good blow out all over, dont try to take the switch of unless you really have to.
Put the cover back on and try to start the motor if it works problem solved if not then take the motor to your local motor repairer and get the rest checked out , most probable is the capacitor

I didn't mean the centrifugal switch Jim, I meant the On/Off switch. I had exactly the same problem with my bandsaw a few weeks a go. The saw would start when I pressed the switch but stop as soon as I let go

Harry, sharpening bandsaw blades is easy if the teeth are less than 4 teeth per inch.All bandsaw blades are filed ( or ground ) in the rip configuration.Another words straight across, not on an angle like a hand crosscut saw.
I use a dremel tool with a chainsaw cylindrical wheel 3/16" in diameter, about 1" of grinding length.
I do not remove the blade. First , remove the blade guard.Vaccumn all the dust from the machine to prevent a fire from sparks.
The wheel will sharpen the teeth and grind the gullets at the same time.Try a dry run without turning the Dremel on.Hold the Dremel level, push in,pull out,usually four strokes,two in and two out will sharpen each tooth.After sharpening a few teeth, take a look at it.You will see that the points are very sharp.much sharper than new.Most blades are carbon steel that are stamped out, not sharpened at all.
Continue until you have done all the teeth. If you err on a tooth or two,don't worry,it will cut fine.Try the blade and you will find that it cuts better than when you first bought it.
I do a lot of resawing with a 16" 2hp saw, I have sharpened blades enough times that I only trash them when they develop metal fatigue.Usually after 10 sharpenings, about 40 to 50 working hours of use.
I do not try to sharpen fine tooth blades, takes too long and probably too difficult.
I sharpen 113" of blade each time, one chainsaw grinding cylinder will do a blade and a half.

mike

I tried out the saw again and it goes. I cut continuously for 1 1/2 hours. I stopped the band saw and then tried to start it and guess what, it would not go. I think its got to do with temperature. I felt the motor and it was feeling pretty warm.


The problem is intermittant, any ideas??

You've tried Jim Carrolls suggestion?

Harry, I sharpen exactly as Mike44 has said. You might also look at removing any resin built up on the blade using oven cleaner - check a recent post in the bandsaw forum for info on prevention.

I also have had problems with fine sawdust in the switch - worth checking.

alex & mike

Any chance you could give me a link or info on this chainsaw cartridge, no knowledge myself of these things.

Well Harry, did you check the switch? I mean, unplug the saw, take the switch out of the machine and visually inspect it for sawdust build up?

Originally Posted by jow104

alex & mike

Any chance you could give me a link or info on this chainsaw cartridge, no knowledge myself of these things.

Hi John,
It's a cylindrical grindstone, used for sharpening chainsaws. It goes in a Dremel or similar. You could probably put it in a power drill. The smallest available, about 3mm dia, is just right for sharpening 3tpi bandsaw blades. You should be able to get one from anywhere that sells chainsaws.

Harry

My bandsaw packed up yesterday.

The motor is making happy sounds but with a bit of clicking.

The blade spins freely.

Guess what, the driveshaft of my bandsaw has a key which drives the belt pulley wheel, the bolt had come out (found it 4 weeks ago on the workshop floor, didnt know where it had come from at the time)

So if your bandsaw is still playing up check if the small belt wheel on the end of the electric motor is at fault.

Alexs ,
many thanks put on the shopping list.

Originally Posted by AlexS

There are 10 types of people - those who understand binary notation and those who don't..

If there were 11 of us we could have a menage-a-trois