Unique Crank trigger wheel

Testing and development of Megasquirt 3

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drewtam
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Unique Crank trigger wheel

Post by drewtam »

Hello, I am intending to install a parallel MS3 + MS3X for sequential COP ignition control of an inline 6 engine. The crank trigger wheel seems to be very unique (yay for me). Does the MS team or community support coding in these unique wheel patterns?
The wheel is 60-6. The missing teeth are not evenly distributed; the pattern is 16-2-15-3-14-4-; where each "-" represents 1 skipped tooth.
The cam pattern is a 5v, digital signal, switching every half revolution. Since a picture is worth a thousand words, the waveform from oscilloscope is attached.

If, on the otherhand, I need to write the code myself, is the only file requiring a new if statement in the "ms3_ign_wheel.c"? Does any other code need to be adjusted?
drewtam
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Re: Unique Crank trigger wheel

Post by drewtam »

No help for unique crank wheels?

I am compiling from code what I think is the right pattern for the wheel, but it won't sync with the engine. Any help on the other files that need to be modified would be appreciated.
bcrx7
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Re: Unique Crank trigger wheel

Post by bcrx7 »

Have you tried to do a composite log of the ignition inputs to see if you are in fact getting the signal that was showing on on the oscilloscope?
1984 Mazda RX-7 GTM Class (BP Engine + BW-EFR 8374 Turbo Full COP/Sequential on MS3+MS3x)
1986 Toyota 4Runner (22RE running on MS2-Extra 3.2.1)
drewtam
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Re: Unique Crank trigger wheel

Post by drewtam »

bcrx7 wrote:Have you tried to do a composite log of the ignition inputs to see if you are in fact getting the signal that was showing on on the oscilloscope?
Yes, it appears correct to me. But I will try to get a screen cap/data log later today.
drewtam
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Re: Unique Crank trigger wheel

Post by drewtam »

drewtam wrote:Yes, it appears correct to me. But I will try to get a screen cap/data log later today.
MS2tester
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Re: Unique Crank trigger wheel

Post by MS2tester »

i managed to do this in the ms2 extra code
https://www.youtube.com/watch?v=K8qEZBXDtxg

http://www.msextra.com/forums/viewtopic ... 91&t=37073

i was trying to get this added to the code
http://www.msextra.com/forums/viewtopic ... 25&t=50520
maybe it will be more succesfull now that someone is actually working on one :roll:

btw i tried to assemble the code with the latest ms3 but got an assembly error
and lost interest
i could do it again so someone could chip in
think it,s a memory space issue
MS2tester
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Re: Unique Crank trigger wheel

Post by MS2tester »

did manage to do it with the 123 code
but got uneven triggers

look at the ms2 code triggers
MS2tester
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Re: Unique Crank trigger wheel

Post by MS2tester »

you could try out the 1.2.3 code
as there is no camshaft defined
but at least you try if it sink up and possible run
https://drive.google.com/folderview?id= ... sp=sharing

i did it this way something about board quata been reached :shock:
drewtam
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Re: Unique Crank trigger wheel

Post by drewtam »

Thanks MS2tester. I had developed a similar code. I haven't compared it to yours line by line though. We did some initial testing on my code and got it to sync. Unfortunately, we are now working on a different engine. We hope to get back to this one in a couple weeks. Please check back then on our progress.
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