Gallery, Projects and General > The Design Shop

Tacho for mill

<< < (3/3)

John Hill:
I have used these little bike computers for a couple of things, anemometers etc but the last one I bought is useless!  The calibration for wheel size is no longer there instead it has a table of most common bike wheel sizes so the mathmatics becomes more difficult!

andyf:
Thanks for the info on the brand, Ian.

I thought about 2 magnets, but the bike speedo I bought wouldn't cater for an 833mm circumference wheel. I suppose that such a wheel (under 11" dia) might be unusual on anything except a kiddy's bike.

Ideal would be to find or attach a horizontal rotating surface to the spindle, drill a hole in it and glue the magnet in there. That would restrain it, and with luck, the material removed to make the hole will weigh about the same as the magnet, which will help keep things reasonably balanced.

Andy

Navigation

[0] Message Index

[*] Previous page