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VEMS Community Forum

Technical => Triggering => Topic started by: Pet on March 25, 2009, 07:03:01 PM

Title: C20XE M2.8 2nd CAM trigger setting
Post by: Pet on March 25, 2009, 07:03:01 PM
Hi, pls, I am not sure, how to set up my second trigger on C20XE M2.8 (dizyless) engine. When 1&4 pistons are in TDC, crank sensor passes 19 teeth (=114deg after wheel gap), CAM trigger comes (when I am calculating right) 144deg BTDC (falling edge), then stays in low for 84deg and finally rising edge comes 60deg BTDC (see picture bottom). So pls, how to setup my 2nd trigger ? I am using 1.0.73 FW..... Thanks a lot. Pet
(http://www.mervart.eu/C20XE/C20XE_M2.8_CAM_trigger.JPG)
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: [email protected] on March 26, 2009, 01:30:12 AM
Go to Settings->Secondary trigger / Cam sync Settings
Put the number 25 in the raw trigger value box titled TODO! should be 0x02 when disabled
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: Pet on March 30, 2009, 03:25:38 AM
Quote from: [email protected] on March 26, 2009, 01:30:12 AM
Go to Settings->Secondary trigger / Cam sync Settings
Put the number 25 in the raw trigger value box titled TODO! should be 0x02 when disabled
Thanks a lot, today I made my first start and it's running (idling) ! ;)
(picture bottom, inj1-4 = injector for cylinder1-4, IGN1 - wasted spark for cylinder 1&4, IGN2- WS for 2&3)
(http://www.mervart.eu/vems/inj_timing1.4.8.2_wasted_spark04.05.jpg)
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: Sprockets on March 30, 2009, 02:15:10 PM
Sorry to go slightly off topic, but what hardware/software are you using to scope those traces? Looks good, but I would assume rather expensive to have all those channels at once, but it's ideal for this sort of work. I was looking at the USB pico stuff, but I'm sure there is better out there, but not a bad price.

Also, good work on getting your engine up and running :)

-Gavin
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: Pet on March 30, 2009, 04:01:23 PM
No problem....I am using NI USB-6009 (259Euro) (max. 48kS, when logging six channels max. sample rate is only 6.8kS, up to 8x analog inputs, 2x analog outputs,12x digital IO,32bit counter) and NI Signal Express SW. These things are quite expensive, but I'm working with them in my job everyday, so it's advantage for me.
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: Sprockets on March 30, 2009, 05:08:24 PM
Thanks for the reply, looked into the pricing for us UK bods. £600 for the software, £179 for the unit.  not to bad for the feature set but think I will stick with my idea of the USB pico, although by the time you add in all the probes for the pico, it soon adds up.

Cheers,

-Gavin
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: MWfire on March 31, 2009, 03:56:17 AM
good scope for little money
http://cgi.ebay.com/USB-digital-oscilloscope-DSO-2150-USB-VISTA_W0QQitemZ170315451971QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item170315451971&_trksid=p3286.c0.m14&_trkparms=66%3A2|65%3A1|39%3A1|240%3A1318
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: mr_g on June 05, 2009, 07:18:19 PM
Is that the one you have? With 2 inputs?
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: MWfire on June 05, 2009, 07:27:35 PM
Quote from: mr_g on June 05, 2009, 07:18:19 PM
Is that the one you have? With 2 inputs?
Yes, 2 input+trigger
Title: Re: C20XE M2.8 2nd CAM trigger setting
Post by: mr_g on June 05, 2009, 07:43:26 PM
Now, I have it also... :)
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