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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
17th Oct, 2009 at 08:43:14am
On 17th Oct, 2009 miniswordsman said:
What's the benefits of using a hall sensor over optical? Just more common or is there more advantages than that? I don't think there's much in it - Hall is possibly more reliable as it will be a totally sealed package and magnetic - the opto switches can get dirt on their "lens". Also the opto is a bit more DIY (needs wiring with a resistor to set voltage). I just chose opto because I've used them before and knew I could make a very simple device and make it very compact. It also allowed me to make all the parts in aluminium (easier to machine). Also, mine is easy to adjust without moving the dizzy, just slaken the nut on the top of the disk. Here it's set relative to the crank (VR) wheel 
MS set to accept the rising edge. On the next one, I'll make the slot narrower. Schrödinger's cat - so which one am I ??? |
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
17th Oct, 2009 at 02:54:29pm
On 17th Oct, 2009 miniswordsman said:
And third, has anyone looked into the cam sprocket sensor with any fervor? Doesn't look like it would be too hard to put a missing tooth wheel in there just like on the crank, only this one would obviously run a cam speed rather than crank speed. The advantage of a cam speed missing tooth wheel is that you can use a single wheel to do sequential injection/ignition. The problem is that unless you have a gear driven camshaft, there will always be some play in the cam drive which will mean less accuracy on the timing and possibly some jitter. And this may also create some jitter on engine speed measurement which will only increase the timing accuracy issue. The most precise timing will always come from a wheel solidly mounted to the crank without any moving interface in between (such as a rubber mounted damper). Jean Edited by jbelanger on 17th Oct, 2009. |
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