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Old 05-05-2017, 11:24 PM   #7161 (permalink)
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Quote:
Originally Posted by duncan2 View Post
I'm direct drive to the diff so I am going to use the old ABS sensors on each wheel as my data for the traction control and also the speed/rpm limiter
Sounds like a good plan.

Quote:
I was thinking about adding the two rear wheel speeds together and comparing to the sum of the two front wheels

I was thinking of a separate module interfacing with the throttle input on the main controller

So it would drop down the throttle input when the tires start to spin - as opposed to just now when the first thing I know is that the tires scream and the back overtakes the front
I would think that Left + right / 2 / rear-end gear ratio should give you motor rpm.

A separate module sounds like a good plan. ABS modules are a part of all of the cars that I know about ... precious little that I do actually KNOW ..

Others have posted silly little messages to get to the fifth post, where you can begin to include links

Is this the link you wanted to post?

Duncan's Dubious Device - DIY Electric Car Forums

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Old 05-05-2017, 11:34 PM   #7162 (permalink)
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Yep that's my thread!
The Device is great fun

I suppose this is number post three - only two to go!

I'm happy about mechanical stuff - I need to learn the electronic stuff
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Old 05-05-2017, 11:38 PM   #7163 (permalink)
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Post Four

I need to decide what speed I actually need

The road speed limit here is 100Kph
The grass events I have been doing are relatively low speed and even the tarmac ones have a limitation on the allowable length of the straights

The only place where I hit my max speeds is at the drags - I hit 140kph at the 1/8th mile
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Old 05-05-2017, 11:39 PM   #7164 (permalink)
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Do I want to increase my maximum speed so that I can dare try a 1/4 mile drag race?

Or am I best with a speed limiter?
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Old 05-05-2017, 11:41 PM   #7165 (permalink)
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Quote:
Originally Posted by duncan2 View Post
I suppose this is number post three - only two to go!

I'm happy about mechanical stuff - I need to learn the electronic stuff
I'm the opposite, I'm afraid. If it has wires, I can get it to work.

But aligning mechanical stuff ... or getting a bearing pressed on .. purging the air from a clutch ... like magic!

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