Hi. I have a 500W variac (auto transformer) and I wish to purchase an electric motor that I can use the variac to regulate the speed of. Many electric motors won't slow down if you lower the voltage, instead they run at the same speed, sound quieter, and, when the voltage drops below a certain level, draw heaps more amps, but stop working. I have read on the internet that a 'shaded pole motor' will work on a variac, but what about a 4 pole motor? Any advice would be appreciated. Thanks
PS Excuse the strange product category, but I had to enter a valid product.
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The brake is incorporated into the motor field - highly unlikely to be the problem.
If the motor is turning but the blade is not then I would be looking at the belt or possible stripped gear at the arbor.
If the motor hums or does not turn it most likely is the front armature bearing.
The C10FS is not an easy tool to service - the entire thing has to be torn down to get to the bearing, I would recommend bringing it to a reputable shop in your area.
measure the contacts over the 2 coils of the electric field sometimes if there was a faltering powercable the pulsation from the coils was to heavy and then by the field the winding wire can also be broken important by broken wire on electric field , test in all cases always the power cord to stretch test
The 'brake' on tools like this is actually a function of the switch allowing some current to flow to one side of the armature to magnetically stop the motor & blade. If the motor works fine but it is no longer breaking you need a new power switch. You need Makita part number 651923-1 for an LS1211 saw.
It sounds like some oil has gotten onto the armature of the motor where the brushes are. That will cause the symptoms of what is happening. Get some Electric Motor and Brake Parts Cleaner at an auto supply house. Note: It is not flammable. If you cannot find it. Get the Regular Brake parts cleaner. FOLLOW THE INSTRUCTIONS BELOW. 1 Allow the saw to cool to room temperature.
2 MAKE SURE IT IS UNPLUGGED
3 Spray the cleaner it into the vent holes 4 Carefully remove the brush caps (Small Black things that look like buttons) There are two of them. 5 Spray inside where the brushes are. 6 Let it dry out for a day. 7 Re-assemble 8 Plug it in and see how it works.
If it is still running roughly after you do the above steps. Get it serviced. There is damage to the armature and brushes.
The brushes in the electric motor have failed..
And sounds like bearing are shot too..
The motor is shot..
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