Print Page - Trigger noise?? dual hall trigger

Title: Trigger noise?? dual hall trigger
Post by: Arvid on March 22, 2009, 07:22:33 AM

Can someone check my trigger wav? :) I wonder if I have some noise prblemer. ??? I use firmware 1.1.47.

Email [email protected]

Title: Re: Trigger noise?? dual hall trigger
Post by: [email protected] on March 22, 2009, 12:48:53 PM

Noise is unusual on Hall setups, it one of their advantages.
What engine and trigger setup are you using?
How did you record the wav?

Title: Re: Trigger noise?? dual hall trigger
Post by: Arvid on March 22, 2009, 05:59:53 PM

Quote from: [email protected] on March 22, 2009, 12:48:53 PM
Noise is unusual on Hall setups, it one of their advantages.
What engine and trigger setup are you using?
How did you record the wav?

It is a volvo B230. Gt1 hall trigger, 2 bolts on flywheel, and original volvo B230 distributor (Bosch) with hall trigger, which is rebuild to give one signal hall trigger camsync. (4+1).
I record the wav with the notebook sound card.

http://www.vems.hu/wiki/index.php?page=ElectronicDesign%2FSoundRecorder

I've sent the wav file to you by email :)

Title: Re: Trigger noise?? dual hall trigger
Post by: [email protected] on March 23, 2009, 12:05:16 AM

So I've stuck it in Audacity and this is the wave form:
(http://www.vems.co.uk/VEMSTrigger/ArvidTriggerTrace.PNG)
I've never seen anything like that before...
What type are the triggers?

Title: Re: Trigger noise?? dual hall trigger
Post by: GintsK on March 23, 2009, 01:19:38 AM

Graphs are maimed by AC character of oscilloscope. And signal is to "loud".
IMO normal signals.

Title: Re: Trigger noise?? dual hall trigger
Post by: Arvid on March 23, 2009, 03:54:23 AM

Quote from: [email protected] on March 23, 2009, 12:05:16 AM
So I've stuck it in Audacity and this is the wave form:
(http://www.vems.co.uk/VEMSTrigger/ArvidTriggerTrace.PNG)
I've never seen anything like that before...
What type are the triggers?

Crank:Honeywell Gt1 hall trigger.
Camsync: Bosch hall trigger (volvo b230 distributor)

Title: Re: Trigger noise?? dual hall trigger
Post by: [email protected] on March 23, 2009, 02:07:55 PM

Apparently the sound card isnt good at sampling a Hall trigger because it has a decoupling capacitor that will screw up the signals - and make them look like that ???

What are the symptoms that are leading you to suspect noise?

Title: Re: Trigger noise?? dual hall trigger
Post by: Arvid on March 23, 2009, 09:26:45 PM

Quote from: [email protected] on March 23, 2009, 02:07:55 PM
Apparently the sound card isnt good at sampling a Hall trigger because it has a decoupling capacitor that will screw up the signals - and make them look like that ???

What are the symptoms that are leading you to suspect noise?

Have problem with misfire. (dvell 1ms 1800-2100rpm misfire) (dvell 3ms 1200-1400rpm misfire) ???

Title: Re: Trigger noise?? dual hall trigger
Post by: PeepPaadam on March 24, 2009, 02:14:16 PM

When misfire gets worse with increased dwell, then it's time to check the coils and wires, one of them probably sparks to chassis.

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Technical => Triggering => Topic started by: Arvid on March 22, 2009, 07:22:33 AM