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Trigger noise?? dual hall trigger

Started by Arvid, March 22, 2009, 07:22:33 AM

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Arvid

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]

[email protected]

#1
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?

Arvid

#2
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 :)

[email protected]

#3
March 23, 2009, 12:05:16 AM Last Edit: March 23, 2009, 12:09:56 AM by [email protected]
So I've stuck it in Audacity and this is the wave form:

I've never seen anything like that before...
What type are the triggers?

GintsK

#4
March 23, 2009, 01:19:38 AM
Graphs are maimed by AC character of oscilloscope. And signal is to "loud".
IMO normal signals.

Arvid

#5
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:

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)

[email protected]

#6
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?

Arvid

#7
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)   ???

PeepPaadam

#8
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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