MMP and MMP 1-cell fan test at startup?

[BrianG]

Originally Posted by Thomas Porfert

...I checked with the engineers and it has all of the hardware to run the fan. It may not have the software turned on though...

That's not what I expected. IIRC, there were a couple of failures where the BEC gave out and when that happened the fan wouldn't work either. So, I just assumed the BEC that supplied the receiver and servos would also power the fan too, just switched via software based on temperature. I could be confusing the MMPro with the MMM though, or maybe just confused altogether.

[bryan]

The fan on my mmp always comes on at start up.But never again.

[Thomas Porfert]

Originally Posted by BrianG

That's not what I expected. IIRC, there were a couple of failures where the BEC gave out and when that happened the fan wouldn't work either. So, I just assumed the BEC that supplied the receiver and servos would also power the fan too, just switched via software based on temperature. I could be confusing the MMPro with the MMM though, or maybe just confused altogether.

We're all a little confused Brian, but that's what makes it interesting.

Apparently it does not run directly off the BEC. The engineers were discussing that exact question after I asked if it would work. My eyes kind of glazed over when they started jabbering away in their engineering jargon. But the end result that I could gather was that it did not run the fan off the BEC itself. Pat may see this and offer some insight on where the fan actually gets its voltage from.

Thomas Porfert
Castle Tech Support