[Diy_efi] WB02 not passing tests completely

[rr]

This tests the integral function. This function is what brings
the feedback loop to zero error (slowly). Your DIY-WB will
function even with a longer time constant.

Also check R33, C7 and R17. They may have some effect
on what you are seeing.

If all looks OK, try it out. No damage will be caused with
the longer time constant.

BobR.


rob files wrote:

> Hi BobR,
>
> What is the significance of these time specs?  Which components influence?
> >From the test procedures and from inspection of the circuit, it appears to
> be controlled by C10, R18 and R34.  I have verified the resistors, and C10
> is the big ass capacitor, so that one is hard to get wrong.  Maybe I have
> short on one of my traces...
>
> Still I would like to understand a little better what these tests validate
> and what the slow ramp times would mean to the operation of the WB sesor.
>
> Thanks for the help,
> Rob
>
> >From: rr <RRauscher at nni.com>
> >Reply-To: Diy_efi at diy-efi.org
> >To: Diy_efi at diy-efi.org
> >Subject: Re: [Diy_efi] WB02 not passing tests completely
> >Date: Thu, 23 May 2002 16:27:25 -0400
> >
> >That doesn't sound right. If it is truely twice as long I'd look for
> >a resistor(s)/capacitors(s) that are mis-placed. Remember
> >that these time factors are +- 10% due to the available components.
> >
> >BobR.
> >
> >
> >
> >rob files wrote:
> >
> > > Hi all,
> > >
> > > For steps #34 and #42 there are time constants given.  For both tests,
> >my
> > > board takes roughly twice as long as specified.  Is this a problem, and
> >if
> > > so, where should I look?
> > >
> > > It passes all other tests with flying colors.
> > >
> > > Thanks,
> > > Rob
> > >


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