Re: reflective optosensor

Well, "the customer is always right". If there's a magnetic sensor that's as easy to use as Ecnerwal's Omron one, then we could probably glue some magnets to the flywheel. He's had the teeth ground off the starter ring gear.

Or, I could give him the famous 30-30 warranty - 30 seconds or 30 feet. ;-)

Thanks! Rich

"30 revolutions" might be more appropriate... :)

Also, I didn't bother to look at the datasheet, but be sure to consider RPM (sensor response frequency). When I was searching gear- tooth sensors a while back, I came across some that were really rather slow. Some as low as 300 Hz. -mpm

He's had the gear teeth ground off his flywheel, since an electric motor doesn't need a starter. ;-) But I just got an email - I showed him the Omron at Digikey that Ecnerwal suggested, and he's going to order a couple.

And, frankly, I don't expect a lot of dirt or grime insida a bell housing - the throwout bearing lives in there, too, you know. And the time I had to replace the clutch on my '71 Econoline, the inside of the bell housing was more dusty than greasy. And if the sensor gets erratic, it'd be simple enough to unscrew it and wipe off the dirt from the markings.

Thanks! Rich

Grease, dust, road dirt, whatever. A blind opto sensor is a blind opto sensor.

I might grind a notch in the edge of the flywheel and use that with a variable reluctance magnetic sensor. Doesn't have to be much--you could probably do it with a file.

Cheers,

Phil Hobbs