Fun with speed and reference sensors
#1
Rennlist Member
Thread Starter
Fun with speed and reference sensors
I've been gearing up for a new project and thought I'd share a bit. I may have misspoke in the video about the 200rpm test-spec, since I was looking at the speed sensor at the time, but thought this video may be of interest regardless to show how the sensor gap changes the output...
#2
Rennlist Member
Cool test, Tom! Did you spin the flywheel by hand, or is there some sort of motor under there?
The next questions that come to mind: Is there any difference with the bell housing in place? What happens when the sensor bracket / bell housing are grounded?
BTW, any luck with those early DME boards? Did you figure out the ref/speed sensor circuits on those?
--Jay
The next questions that come to mind: Is there any difference with the bell housing in place? What happens when the sensor bracket / bell housing are grounded?
BTW, any luck with those early DME boards? Did you figure out the ref/speed sensor circuits on those?
--Jay
#3
Rennlist Member
Thread Starter
Cool test, Tom! Did you spin the flywheel by hand, or is there some sort of motor under there?
The next questions that come to mind: Is there any difference with the bell housing in place? What happens when the sensor bracket / bell housing are grounded?
BTW, any luck with those early DME boards? Did you figure out the ref/speed sensor circuits on those?
--Jay
The next questions that come to mind: Is there any difference with the bell housing in place? What happens when the sensor bracket / bell housing are grounded?
BTW, any luck with those early DME boards? Did you figure out the ref/speed sensor circuits on those?
--Jay
No motor, I use a drill with bristle brush to get the flywheel spinning. It works, what can I say... I 3d printed a hub to mount the flywheel on, which sat over a bearing, but eventually I had the hub made in aluminum by a friend. You can see in the video that even the slightest run-out causes the signal to get stronger and weaker, so the plastic had to give way to metal...
#4
Drifting
Very interesting indeed. FYI through my trials with the FAE brand sensors, I discovered that those are ever slightly different size: I set the gap using one of the FAE brand + .8mm washer and then installed a Bosch sensor in its place, noting a distinct drop in signal level. The difference is so slight that someone using aftermarket sensors wouldn't notice by eye but it could affect signal
#5
Rennlist Member
Tom, cool video. Thanks for sharing. Where's this all headed?