I had a Rumba powered at 28V and ran it for months, till I just upgraded to a Smoothieboard and haven't looked back.
I know now that I was having problems overheating the drivers. The symptom is shifted layers due to lost steps. These could be anything from a very minor shift to a big shift. If you use a higher voltage, and also high current then you have to have very good heat syncs and very powerful fan. Run-of-the-mill fans wouldn't do it. If you can keep your finger on the driver's heat syncs without getting burned then it's probably cool enough.
Double check the wiring diagram on the wiki here.
Note the jumpers just above the fan connectors. If you use a higher voltage, then make sure you position the jumpers properly or you will fry your fans.
Hope it goes well.
I know now that I was having problems overheating the drivers. The symptom is shifted layers due to lost steps. These could be anything from a very minor shift to a big shift. If you use a higher voltage, and also high current then you have to have very good heat syncs and very powerful fan. Run-of-the-mill fans wouldn't do it. If you can keep your finger on the driver's heat syncs without getting burned then it's probably cool enough.
Double check the wiring diagram on the wiki here.
Note the jumpers just above the fan connectors. If you use a higher voltage, then make sure you position the jumpers properly or you will fry your fans.
Hope it goes well.