Waldo wrote:I notice that speed less than 4 mph does not show on the display, nor is it in the data file record.
With CA2 V2.25 the lowest indicated speed is 2.5mph.
It would be great if the CA could show speed aproaching 0.00.
I use three evenly-spaced spoke magnets and get speeds down to about 3.25-3.45 mph which is fine for me. This was a quick test a couple of minutes ago, but a sudden downpour ended the test after only a couple of tries, but I don't think it will go much lower.
A single magnet was working fine (I never bothered with super low speed checks) but upgraded to try to smooth out low speed 'Speed Throttle'. With only a single magnet I was only getting a speed update about every 6m (very delayed feedback to the CA compared to 20-something motor poles) - with three, it's about every 2/3m. Other pressing matters prevented finishing up those tests, but I'm hoping to return to them shortly.
Tench wrote:I am using a wheel driven speed sensor on my CA, i tried fitting 3 magnets to the disc spider but their strength and proximity caused a field too strong for the reed switch to release.
Clever idea. If you haven't abandoned that setup entirely, you can try attaching a small magnet with reverse poles to your pickup. This works pretty well in general with reed switches - sometimes you need to position it away from the center of the switch towards one end.
Tench wrote:... If you can use multiple evenly positioned magnets...
Although in this case your recommendation is clearly going after more frequent and evenly-spaced updates, Justin reports that in the general case, additional wheel magnets do *not*
need to be evenly spaced. This is nice since, for instance, on my bike my 'evenly spaced' options are 1, 3, and 9.
BTW - Although spoke magnets from just about anywhere will work, ebikes.ca
will sell them individually - if you're thinking on these lines, email and have them throw a few in the box when you order your new v3.