SV650.org - SV650 & Gladius 650 Forum - View Single Post - So, who can tell me how the speedo drive works...

northwind · 08-01-07, 11:25 PM

Well, I know how it works... Instrumentation sends 12v down one cable, 5v down another, and there's an earth in the third. The sensor spins, hall-effect sensor does it's thing, and something happens that tells the clocks how fast you're going. But what is it that actually goes back to the instruments, and on which line/lines? Pulses, presumably... But what's pulsing I don't know. Or maybe it shorts to earth and the fluctuations in draw work the clock?

08-01-07, 11:25 PM	#1
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	So, who can tell me how the speedo drive works... Well, I know how it works... Instrumentation sends 12v down one cable, 5v down another, and there's an earth in the third. The sensor spins, hall-effect sensor does it's thing, and something happens that tells the clocks how fast you're going. But what is it that actually goes back to the instruments, and on which line/lines? Pulses, presumably... But what's pulsing I don't know. Or maybe it shorts to earth and the fluctuations in draw work the clock? __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"