flyrotary@lancaironline.net Mailing List Archive

Hi Finn Great news. Look forward to getting the EC3 tested. Hear what your saying re static. Steve > On 26 Jun 2020, at 8:15 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote: > > Well, I dragged it outside and ran it today. (RX-8 Renesis, LS2 coils, Large secondary injectors) > > Like night and day! Smooth as silk. > > Ran it up to 5,800 RPM w/o prop. > Mounted my RV-3B prop and ran it up to about 3,800 RPM. > Don't know how I'm going to run it at higher RPMs until I get canopy back on, seats in and brakes connected. Too much wind from the prop. > So it may be a while until I can run it at full power while I finish up some fuselage items, put on the wings, etc. > > Oh, the A controller chip does not have working inputs for Mode selector switch and Store/Primer switch. So I first ran it on B, thinking A wasn't working. But engine continued running when switching over to A. I'm amazed how weak the inputs on those chips are. (Actually I borrowed them from Tracy -- used -- so may have been damaged in a less humid environment.) Still, I have two otherwise brand new chips I can't reprogram. So either the Vpp input or the PGD output must be damaged. > In addition to taking precautions against static electricity when handling the chips, it probably would not be a bad idea to add static protection (for example 5.1V zeners to ground) on the 4 mode switch inputs, Store input, etc. > J2 pins 1, 7, 9, 10, 11, 16, 21, 22, 23 and 24 all go directly to the CPU chips. Some have 10K pull-up resistors, some a capacitor to ground, but all susceptible to damage by static electricity, a stray 12V wire, etc. when not connected to the PCM (program and control module). Maybe I'm just too charged up :) > > Finn > > On 6/25/2020 6:27 PM, Stephen Izett stephen.izett@gmail.com wrote: >> 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’m writing this, I just realised I still could have tested the code with one of the secondaries not connected. >> I’m 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: >>> >>> Cool. Probably won't beat you to it. Still working on the canopy bow. Fiberglass - yuk! >>> >>> Finn >>> >>> On 6/24/2020 8:37 AM, Stephen Izett stephen.izett@gmail.com wrote: >>>> Hi Finn >>>> >>>> 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’ll see about swapping in the EC3 and see if she runs! >>>> I’ll let you know how we go. >>>> >>>> Thanks Finn >>>> >>>> Steve >>>> >>>>> On 24 Jun 2020, at 7:52 pm, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote: >>>>> >>>>> Hi Finn >>>>> >>>>> ok. Now I recall you mentioning this recently but misunderstood. >>>>> Sorry I haven’t read all your emails carefully enough having done the work with tracy. >>>>> >>>>> Good news for this EC3, that being the case. >>>>> I’ll see if I have enough time tonight to reprogram the chips as I’m headed down tomorrow and could test the new code. >>>>> >>>>> 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! >>>>> >>>>> 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 = 3.4v. If I use the 3.3v it would clip the signal at 3.3+~0.7=4v. My analog amp knowledge is woefully lacking these days >>>>> but I thought this extra 0.6v would be fine for Tracy’s conditioning circuits. >>>>> Appreciate any analog insights you can offer re those signal conditioning amplifier/buffers? >>>>> >>>>> Cheers >>>>> >>>>> Steve Izett >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>>> On 24 Jun 2020, at 6:27 pm, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote: >>>>>> >>>>>> Steve, >>>>>> >>>>>> 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: >>>>>> >>>>>> "Here it is: >>>>>> https://drive.google.com/drive/folders/1mVzPOxUwcGUlPizxnRF40nUyKBzfT4DC?usp=sharing >>>>>> It's EC3closedloop.zip." >>>>>> >>>>>> Finn >>>>>> >>>>>> On 6/23/2020 6:23 PM, Stephen Izett stephen.izett@gmail.com wrote: >>>>>>> Hi Finn >>>>>>> >>>>>>> Sorry, I misunderstood. Too many things on my mind at work at present. >>>>>>> >>>>>>> When I get to the EC3 mods I’ll: >>>>>>> a. Test the EC3 with new clamped CAS input. If no change and it still runs like a dog on two legs - >>>>>>> b. I’ll reprogram the chips with your hex code and retest. >>>>>>> >>>>>>> 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’t trust? >>>>>>> Cleaning is $40 each. New ones are $20 each! >>>>>>> >>>>>>> Cheers >>>>>>> >>>>>>> Steve Izett >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>>> On 24 Jun 2020, at 12:04 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote: >>>>>>>> >>>>>>>> Oh, you already reprogrammed them with the fixed code I uploaded? >>>>>>>> >>>>>>>> Finn >>>>>>>> >>>>>>>> On 6/23/2020 10:44 AM, Stephen Izett stephen.izett@gmail.com wrote: >>>>>>>>> Thanks Finn. >>>>>>>>> >>>>>>>>> I’ll 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. >>>>>>>>> >>>>>>>>> Steve >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>>> On 23 Jun 2020, at 9:56 pm, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote: >>>>>>>>>> >>>>>>>>>> Attached is an excerpt of the EC3 CAS input conditioning circuit without added clamping circuit and with. >>>>>>>>>> >>>>>>>>>> Finn >>>>>>>>>> >>>>>>>>>> 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’ll mod the EC3 and see if that is the problem. >>>>>>>>>>> >>>>>>>>>>> Cheers >>>>>>>>>>> >>>>>>>>>>> Steve Izett >>>>>>>>>> <EC3 CAS input with clamp.pdf><EC3 CAS input.pdf>-- >>>>>>>>>> Homepage: http://www.flyrotary.com/ >>>>>>>>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>>>>>>> -- >>>>>>>>> Homepage: http://www.flyrotary.com/ >>>>>>>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>>>>>>> >>>>>>>> -- >>>>>>>> Homepage: http://www.flyrotary.com/ >>>>>>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>>>>> -- >>>>>>> Homepage: http://www.flyrotary.com/ >>>>>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>>>>> >>>>>> --- >>>>>> This email has been checked for viruses by Avast antivirus software. >>>>>> https://www.avast.com/antivirus >>>>>> >>>>>> >>>>>> -- >>>>>> Homepage: http://www.flyrotary.com/ >>>>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>>> -- >>>>> Homepage: http://www.flyrotary.com/ >>>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>> -- >>>> Homepage: http://www.flyrotary.com/ >>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>> >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html