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Renault 60-2 Missing Teeth Decoder 
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QFP80 - Contributor
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As i wrote in my thread in the vehicles section im trying to run the Freeems on a Renault 60-2 trigger wheel.

viewtopic.php?f=3&t=2380

Unfortunately the wheel looks more like a 57-1,5+1,5 trigger wheel.
In the OEM setup there is also a half moon cam trigger, but the goal for now is to get only the crank trigger working.

Reason for this thread is to post additional information about the Renault Trigger configuration

Image

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Fri Jan 31, 2014 1:24 pm
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QFP80 - Contributor
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This trigger wheel is working with ( freeems-vanilla 0.2.0 ) :lol:


Wed May 28, 2014 11:53 am
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0.2.0 is not out yet! 0.2.0-SNAPSHOT, is, though, so I guess that's what you're using ;-)

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Thu May 29, 2014 7:21 am
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Ahh, sorry to say this, but using this wheel with the missing tooth decoder is not a good move! At best you'll get +/- 3 degrees of error in your timing if the event happens to be scheduled from the oddly spaced edge. one of the two odd spaced edges. The pattern is actually ...1, 1.5, 2.5, 1... whereas your decoder is expecting ...1, 1, 3, 1... hence the two 0.5 spacing error, standard spacing = 6 degrees, and half that is 3. The only reason it's working at all is that you must have loosened the tolerances right off. Oops.

This is almost certainly contributing to your sync loss issues in the other thread which I'll cross reference soon, here: viewtopic.php?f=56&t=2641

I'm sorry I didn't notice your comment "Unfortunately the wheel looks more like a 57-1,5+1,5 trigger wheel." Nor did I see/recognise/realise what this photo meant:

Image




And now I see another comment "It is a kinda 57 +1,5 tooth -1,5 gap .. something like this .." wish I'd seen/noticed these earlier!

Sorry.

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FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!


Sun Sep 04, 2016 10:41 am
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QFP80 - Contributor
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correctly wired the decoder see´s ...1, 2.5, 1.5, 1...

Sidenote: Volodsquirt seems to be fine with this trigger wheel although it´s seeing ...1, 2.5, 1.5, 1... but people used to have had problems to get it working ..


Mon Sep 05, 2016 10:24 am
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All that tells you is that you can't trust their firmware! :-/ One of the edges IS in the wrong place AND of variable position, so unless you can somehow tell it that, then it's going to do bad things.

Thanks for the polarity info! I plan to support both polarities, as either should work fairly reliably depending upon how it's constructed. If you think it's not worth it, maybe I won't bother.

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DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!


Mon Sep 05, 2016 10:56 am
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