flyrotary@lancaironline.net Mailing List Archive

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