OF1010EBQ Faulty speed control

[jt073]

My OF1010 is playing up. It has been running a bit unevenly at times but today the speed control basically seems to have stopped working.

I had set it to speed 1 (only doing a very light cut) but after about 5 minutes it reverted to full speed and the speed adjustment dial seems to make little difference.

I have checked under the top cover and given it a little brush out - it all looks clean enough. I changed the brushes (as I had bought some thinking that may have been a cause of the inconsistent running),  this has made no difference.

I guess that leaves the speed sensor (EKAT calls this the tachometer coil), or the main electronic board. The speed sensor is about £8 but the board is a lot more. I am thinking I will order a speed sensor and try that but does anyone have any other insight?

Cheers

 

[Packard]

That same thing happened with my Ridgid sander from Home Depot.  Shortly after that it died.

It was a cheap tool, and I just replaced it.  I would hate to have that happen with an expensive tool.

Of all the electric machines I have, my sanders have hat the most running hours.  I assume that the hours just caught up on it.

 

[peter halle]

Try operating the speed control lots of times with it off.  I seem to remember from a looooooong time ago that this might clean the contacts.  Can’t hurt to try.

Peter

 

[jt073]

Thank you Peter - I had tried this a bit with the router switched on, but I have now tried a more prolonged vigorous operation of the speed control with the machine off.

It seems to be ok at the moment… maybe this has worked, we will see.

This at least suggests that it is not the sensor that is at fault and more likely the speed control itself - this is encapsulated in the main electronic board which is an £88 part, so I will sit on it for a bit!

Cheers

 

[peter halle]

I think that the contacts in the speed control can oxidize and operating the speed control "wipes" the contacts.

Happy routing!

Peter

 

[Crazyraceguy]

It should have nothing to do with the speed controller itself, but I have a couple of questions. What bit where you using? The reference to a "light cut" confuses me too. The speed (RPM) of the bit is generally related to the diameter of the bit, not the depth of the cut. (though that should be controlled by the bit size too)

 

[jt073]

The reason I wanted a slow speed was that I was template routing some 12mm Perspex with a small bearing guided bit.
In fact it did no harm that the machine sped up, but it just highlighted a problem that has been apparent for some time.

Cheers