EDIS trigger angle adjust

eliotmansfield · Post by **eliotmansfield** » Wed Jan 30, 2008 1:17 pm

As noted in this thread:
http://www.msextra.com/viewtopic.php?t=26117&highlight=
the ability to trim the offset of the wheel when in edis mode is ignored.

Whereas in MS2 B&G you can trim it. Is this easy to re-introduce?

And i would still like to clarify if I should be using rising or falling edge. My input circuit is as it was when running ms1-e, using phils diagram. (V2 PCB)

Cheers,

Post by **jsmcortina** » Wed Jan 30, 2008 2:04 pm

The MS1 chip is always falling edge on the interrupt pin.

I'll take a look at permitting a little bit of trim when using EDIS. As you've guessed it isn't difficult.

James

eliotmansfield · Post by **eliotmansfield** » Wed Jan 30, 2008 4:16 pm

jsmcortina wrote:The MS1 chip is always falling edge on the interrupt pin.

And does that apply for MS2-extra also?
As MS2 B&G now says rising: http://www.megamanual.com/ms2/EDIS.htm
But the MS2-Extra says falling http://www.msextra.com/ms2extra/MS2-Extra_EDIS.htm

jsmcortina wrote: I'll take a look at permitting a little bit of trim when using EDIS. As you've guessed it isn't difficult.
James

Great - cheers.

I would of thought a max of plus or minus 5 degrees should do it - otherwise the limp mode could be compromised.

Philip Lochner · Post by **Philip Lochner** » Tue Feb 05, 2008 4:08 am

I noticed that on the Extra site, wiring of the tach input is different to what B&G recommends.

Extra, straps the tach input of the hall circuit to 12V and then connects the "ground" side of the circuit (XG1 ) to the PIP signal via Tach input pin, whereas B&G jumpers XG1 and 2 (earthing it) and then connects PIP to the Opto-in jumper.

Would this not cause the input trigger to be inverted for Extra which in turn would require the output signal to be inverted, or somesuch?

Post by **jsmcortina** » Tue Feb 05, 2008 4:36 pm

From MSnEDIS days before the MS2 existed we had success with using the EDIS module to sink current by tieing the "top" of the hall sensor to 12v.
I've seen reports of problems with the wiring the other way - same for HEI7.

Consequently we've stuck to the original known good wiring.

James

Philip Lochner · Post by **Philip Lochner** » Tue Feb 05, 2008 11:12 pm

Well, this (using EDIS to sink current) might explain two things:

1) Why I found that I had to make R12 4K7 to prevent the PIP signal from being pulled down;

2) Why the B&G EDIS documentation had been incorrect for some time ito how the settings should be for EDIS. With settings as per the documentation as it was then, my SAW signal co-incided with the rising edge of the PIP signal and not the falling edge as it should be.