RO125 running hot?

[hcoyote]

Hello,

Tonight, I was working on a new breadboard containing various hardwoods.  I was sanding down both sides, going from 80, to 120, to 180, to 220 grit in rotary mode, running for maybe a total of 20-25 minutes with some breaks in between for flipping the board and changing out grits.  I noticed about half-way through that the body of the sander was getting uncomfortably warm.  When I noticed it, I realized my CT was running at half speed, so I turned it all the way down, thinking that the extra suction might have been causing it to do more work than necessary.  I wasn't applying much pressure to it all, just enough to control direction of my passes.

Is this normal?  The RO is about 6-8 months old and only has a few hours of use on it (I think enough to break in the contacts on the motor).

Travis

 

[AlexThePalex]

The Ro125 running hot has nothing to do with the suction.

When you say "the body", which part do you mean exactly? Do you mean the main body sticking backward, or the head right above the sanding pad?

It is normal that the head runs hot, especially when your sander is pretty new. Nothing to worry about. It's just the gears. This will get better over time, though the Rotex will always keep running quite hot.

But if it is the other part, where the motor is, then that can indicate a problem. The brushes wearing is not to blame, that doesn't generate heat. But if there's a problem with your motor that might generate a lot of heat.

Best call Festool service number.
   

 

[hcoyote]

The part that's getting hot is the head.  The main part between the on/off switch and the dust port seems to be a reasonable temperature.

Thanks for the explanation.  I'll keep an eye on it since I have a few more  boards to deal with.  If it seems to be spreading, I'll definitely call in to Festool and have them check it out.