Tablesaw switch problem

[SheriDi]

Is it possible that the switch you pointed to with the yellow arrow in the original post is a safety interlock that prevents anything from working when the cover with the red and green buttons is removed?  In other words does putting the cover on cause that switch to be depressed?

So the green button on the cover lines up with the square black “post”, correct?  What does the red button on the cover line up with, that red reset button?  Or what does the red button on the cover contact when pressed?

The switch on the yellow arrow is not depressed by anything on the cover.  The green button lines up with the black post and the red button lines up with the reset button.

[Roly]

The "reset" button is directly underneath the "Off" button on the outer case.  Maybe if I push it in farther it will reset?  





I guess I will attach a new plug, and turn the over protection down and give that a try.

Can you disconnect one of the motor leads to see if the contactor (the part you were told to push in itself pulls in and stays when you press start (motor will not start with lead disconnected)  if not press the reset and try.  Keep the lead you disconnected in the clear.  This is to verify the contactor is working.  I think it will will work.    There is a centrifugal switch in the motor which if it sticks will hod the starting winding in causing over current. 
If the contactor is working turn the overcurrent setting down and try connecting the motor lead and see if it works. Could also be bad capacitor/s which if bulging will be bad.   Roly

[SheriDi]

I replaced the plug, started it up and it ran for a few seconds before I saw a spark at the switch and it powered off. On the plus side, the plug did not get hot.

Last question to you kind folks...

The current switch is rated at 18-26 amps while the motor is rated at 12.4.

I'm wondering if the switch is too much for my motor.  Is it worth a try replacing the switch with a switch more in line with the motor?

Thanks again!

[Roly]

I replaced the plug, started it up and it ran for a few seconds before I saw a spark at the switch and it powered off.  On the plus side, the plug did not get hot.

Last question to you kind folks...

The current switch is rated at 18-26 amps while the motor is rated at 12.4.

I'm wondering if the switch is too much for my motor.  Is it worth a try replacing the switch with a switch more in line with the motor?

Thanks again!

The switch would not cause your problem, if anything it would delay it tripping off.   I would bet the centrifugal switch is bad and not cutting the start winding out or capacitors are bad. If the motor has any air vents try blowing the motor out.   The motor sitting for 5 years may be part of the problem and allowing the centrifugal switch to stick.   Also at 25 years old the capacitor may be bad.  The few seconds before tripping sounds like the centrifugal switch issue with requires motor disassembly.   Probably just needs cleaning.   Roly

[SheriDi]

The switch would not cause your problem, if anything it would delay it tripping off.   I would bet the centrifugal switch is bad and not cutting the start winding out or capacitors are bad. If the motor has any air vents try blowing the motor out.   The motor sitting for 5 years may be part of the problem and allowing the centrifugal switch to stick.   Also at 25 years old the capacitor may be bad.  The few seconds before tripping sounds like the centrifugal switch issue with requires motor disassembly.   Probably just needs cleaning.   Roly

Thanks Roly.  I didn't see your post from yesterday afternoon, so I will try that today.  When the motor started, it didn't sound right...almost like it was turning too fast.  

There is a motor shop nearby, so I can take it there if it appears to be something internal.

[Roly]

Thanks Roly.  I didn't see your post from yesterday afternoon, so I will try that today.  When the motor started, it didn't sound right...almost like it was turning too fast.  

There is a motor shop nearby, so I can take it there if it appears to be something internal.

On the name plate it says TEFC which is (totally enclosed fan cooled) so no vents to blow out.  Roly

[SheriDi]

Can you disconnect one of the motor leads to see if the contactor (the part you were told to push in itself pulls in and stays when you press start (motor will not start with lead disconnected)  if not press the reset and try.  Keep the lead you disconnected in the clear.  This is to verify the contactor is working.  I think it will will work.    There is a centrifugal switch in the motor which if it sticks will hod the starting winding in causing over current. 
If the contactor is working turn the overcurrent setting down and try connecting the motor lead and see if it works.    Could also be bad capacitor/s which if bulging will be bad.    Roly

Before I blow myself up....

Disconnect one of the leads from the motor (not the switch) and then plug it in and do your tests?

[Roly]

Before I blow myself up....

Disconnect one of the leads from the motor (not the switch) and then plug it in and do your tests?

You could just disconnect one of the motor leads from the switch if it is easier but tape the ends of the disconnected lead.  The motor will not run like this but the switch should operate normally.   Again I dont think anything is wrong with the switch.  Roly

[Roly]

Before I blow myself up....

Disconnect one of the leads from the motor (not the switch) and then plug it in and do your tests?

Just disconnect the motor lead from either the switch or motor and tape the end up.   Or both motor leads if you want and plug in and try the starter which should operate normally.  Naturally the motor will not run but that will tell you if the motor is the issue.    Which it will be.  Roly

[SheriDi]

Just disconnect the motor lead from either the switch or motor and tape the end up.   Or both motor leads if you want and plug in and try the starter which should operate normally.  Naturally the motor will not run but that will tell you if the motor is the issue.    Which it will be.  Roly

Got it.  Thanks