Replies

1. 
   lat_axe | Jun 25, 2020 05:06am | #1

   I had a similar thing with a planer-thicknesser that began to go backwards now and then after switch-on. It turned out to be the capacitor used to provide the initial high power input on start-up of a machine to overcome it's inertia.

   Capacitors degrade and apparently begin to misbehave. The planer-thicknesser item was rather bloated when extracted. A new one cured the problem (now at least 10 years ago, with no issues since).

   If it is a simple matter of replacing a capacitor (or any other standard component of the motor circuitry) beware of the original manufacturer's item. They often charge a silly price for such things when a standard and identical component can be found, will cost a 1/3rd of the machine maker's price and may even work better.

   Lataxe

2. 
   rob_ss | Jun 25, 2020 05:34am | #2

   With lataxe on this BUT - beware cheapo capacitors on ebay and similar. Capacitors need to be made properly and so most of us who play with such a lot generally buy a higher than required voltage capability. You need the same uF rating, but buy a 240V version rather than 110V. Higher voltage means a stronger, better built (also often larger) capacitor.

3. 
   ddeibert | Jun 25, 2020 11:09am | #3

   Thank you for your input. I will try that and see what happens

4. 
   john_c2 | Jun 25, 2020 12:13pm | #4

   The capacitor can be an issue with an induction motor. But the motor in this case is direct drive, and all of the direct drive table saw motors I have seen use universal motors. And universal motors don't have capacitors.