From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: EC3 hardware notes
Date: Fri, 26 Jun 2020 06:27:25 +0800
References: <list-413066@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-413066@logan.com>
Message-Id: <354329C6-1D00-49EA-8B45-EB22D5671A08@gmail.com>

Hi Finn

When I went to the hangar yesterday, unfortunately I found that one of =
the solder lugs (not the joint, but the lug itself) on the EC2 to EC3 =
adapter db37 had broken off which is very disconcerting.
It was one of the secondary injector feeds, so not responsible for the =
rough running. I now need to replace/resolder it with a new female db37. =
Very annoying!
Doh! As I=E2=80=99m writing this, I just realised I still could have =
tested the code with one of the secondaries not connected.
I=E2=80=99m busy with my kids and grandkids up from the farm this =
weekend so its not going to happen for another week at least.

Steve Izett


> On 25 Jun 2020, at 1:38 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>=20
> Cool. Probably won't beat you to it. Still working on the canopy bow. =
Fiberglass - yuk!
>=20
> Finn
>=20
> On 6/24/2020 8:37 AM, Stephen Izett stephen.izett@gmail.com wrote:
>> Hi Finn
>>=20
>> Both A & B chips erased, verified blank, reprogrammed (EC3CL8.HEX =
17/06/2020), verified and checked program and config memory.
>> All looks right.
>> So after flying tomorrow on the EC2, I=E2=80=99ll see about swapping =
in the EC3 and see if she runs!
>> I=E2=80=99ll let you know how we go.
>>=20
>> Thanks Finn
>>=20
>> Steve
>>=20
>>> On 24 Jun 2020, at 7:52 pm, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>>>=20
>>> Hi Finn
>>>=20
>>> ok. Now I recall you mentioning this recently but misunderstood.
>>> Sorry I haven=E2=80=99t read all your emails carefully enough having =
done the work with tracy.
>>>=20
>>> Good news for this EC3, that being the case.
>>> I=E2=80=99ll see if I have enough time tonight to reprogram the =
chips as I=E2=80=99m headed down tomorrow and could test the new code.
>>>=20
>>> I tried to pick up some 2.7v zeners today, but they only had 3.3v in =
single units and 2.7v by the 1000!
>>>=20
>>> So the full wave clipping circuit you supplied should clip the CAS =
signal to Zener voltage + forward volt drop of the other zener.
>>> 2.7+~0.7 =3D 3.4v. If I use the 3.3v it would clip the signal at =
3.3+~0.7=3D4v. My analog amp knowledge is woefully lacking these days
>>> but I thought this extra 0.6v would be fine for Tracy=E2=80=99s =
conditioning circuits.
>>> Appreciate any analog insights you can offer re those signal =
conditioning amplifier/buffers?
>>>=20
>>> Cheers
>>>=20
>>> Steve Izett
>>>=20
>>>=20
>>>=20
>>>=20
>>>=20
>>>=20
>>>=20
>>>> On 24 Jun 2020, at 6:27 pm, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>>>=20
>>>> Steve,
>>>>=20
>>>> It will NOT run programmed for Renesis and LS2 coils unless you =
reprogram the chips using the source code I uploaded on the 17th of =
June:
>>>>=20
>>>> "Here it is:
>>>> =
https://drive.google.com/drive/folders/1mVzPOxUwcGUlPizxnRF40nUyKBzfT4DC?u=
sp=3Dsharing
>>>> It's EC3closedloop.zip."
>>>>=20
>>>> Finn
>>>>=20
>>>> On 6/23/2020 6:23 PM, Stephen Izett stephen.izett@gmail.com wrote:
>>>>> Hi Finn
>>>>>=20
>>>>> Sorry, I misunderstood. Too many things on my mind at work at =
present.
>>>>>=20
>>>>> When I get to the EC3 mods I=E2=80=99ll:
>>>>> a. Test the EC3 with new clamped CAS input. If no change and it =
still runs like a dog on two legs  -
>>>>> b. I=E2=80=99ll reprogram the chips with your hex code and retest.
>>>>>=20
>>>>> On another note:
>>>>> Still trying to decide on whether to pay to have my 4 blue =
secondary injectors cleaned and tested or
>>>>> buy new injectors, New ones are cheaper on eBay but are they knock =
offs that I shouldn=E2=80=99t trust?
>>>>> Cleaning is $40 each. New ones are $20 each!
>>>>>=20
>>>>> Cheers
>>>>>=20
>>>>> Steve Izett
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>> On 24 Jun 2020, at 12:04 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>>>>>=20
>>>>>> Oh, you already reprogrammed them with the fixed code I uploaded?
>>>>>>=20
>>>>>> Finn
>>>>>>=20
>>>>>> On 6/23/2020 10:44 AM, Stephen Izett stephen.izett@gmail.com =
wrote:
>>>>>>> Thanks Finn.
>>>>>>>=20
>>>>>>> I=E2=80=99ll add the 2 zeners to the EC3 and test it.
>>>>>>> I thought the reprogramming of the chips was right.
>>>>>>> MPLABS reported them to be good.
>>>>>>>=20
>>>>>>> Steve
>>>>>>>=20
>>>>>>>=20
>>>>>>>=20
>>>>>>>=20
>>>>>>>> On 23 Jun 2020, at 9:56 pm, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>>>>>>>=20
>>>>>>>> Attached is an excerpt of the EC3 CAS input conditioning =
circuit without added clamping circuit and with.
>>>>>>>>=20
>>>>>>>> Finn
>>>>>>>>=20
>>>>>>>> On 6/22/2020 10:02 PM, Stephen Izett stephen.izett@gmail.com =
wrote:
>>>>>>>>> Thanks Finn. Did you previously give us a the circuit? Do you =
have a sketch of it?
>>>>>>>>> I=E2=80=99ll mod the EC3 and see if that is the problem.
>>>>>>>>>=20
>>>>>>>>> Cheers
>>>>>>>>>=20
>>>>>>>>> Steve Izett
>>>>>>>> <EC3 CAS input with clamp.pdf><EC3 CAS input.pdf>--
>>>>>>>> Homepage:  http://www.flyrotary.com/
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