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Found this chart, Buly. If I interpret it correctly and you have more than 30 feet length of shielded cable, it would appear to distort the injector pulse sufficient for it to need reshaping. However, I presume you don't have more than a few feet - so this may not be the problem - it really depends a lot of the capacitance to the particular shield cable you used.
Ed
Justified signal processing
Waveform Maximum Reshaping
transmission required
Sine wave < 5 ft. not required
TTL Square wave
(single ended) < 30 ft. > 30 ft.
TTL Square wave
(complementary) < 50 ft. > 50 ft.
TTL Square wave same as TTL complementary
(open collector) except greater noise immunity
Line Driver
(differential) > 50 ft. not required
Amplified analog
(complementary) < 30 ft. > 30 ft.
Pulse < 20 ft. not feasible
If signal cables are long, the signal can require reshaping to ensure its reliability. Assuming quality cable is used, listed here are rough breakpoints at which additional processing is required.
----- Original Message ----- From: "Bulent Aliev" <atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, May 18, 2007 6:32 AM
Subject: [FlyRotary] Re: Frustration update
My coils are the LS-1 Bob, but the coils tested fine. Just the injectors are dead when the whole thing is plugged?
Buly
On May 17, 2007, at 11:45 PM, Bob White wrote:
Hi Buly,
I'm really disappointed. I was hoping it would fire right up. BTY,
do you have LS-1 coils. That's what my unit is programmed for.
Bob W.
On Thu, 17 May 2007 21:41:49 -0400
Bulent Aliev <atlasyts@bellsouth.net> wrote:
Today I received Bob White's EC and that helped clear Tracy's update
from being the problem. Did ring all the pins between the EC plug and
control panel. Everything checked OK. Did ring all the pins to the
crank angle sensor. All OK. Checked all ground pins for a 10th time,
all OK. Headed home in disgust. I'll keep pocking until I stumble on
something?
Buly
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-- N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
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