RE: CDI gr8flyer55
Charlie, can you make a picture of the curve ? I try any curve I know, but al the values are normal.
Posted on: 9/18/2012 4:41 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11232131

RE: CDI gr8flyer55
Sorry, I don't take the time to read something important.
Posted on: 9/18/2012 2:40 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11232069

RE: CDI gr8flyer55
The flyback we use can't generate enough power to make multi sparks. The transformer is much to small to load the capacitor between two sparks. A other isue will be the pressure into the cilinder from this small engines. Into the cilinder you have ~6 bar and need about 30 mJ to generate a small spark. If tested outside the cilinder you have a spark, but not when the engine runs. So you wast power for the next real spark you want to have.....not good. At high rpm the time to load the capacitor will again shorter, less power to load the capacitor. The flyback don't have enough time and power to load the capacitor. Thats why you can't run high rpm with the multispark option. Use multi spark with low rpm at start, it don't do any thing......next spark will be after TDC. All petrol wat is not burn is allready find the way out, why do we want to ignite this petrol ? It isn't I don't like multi spark, but when you lost power (get small spark) it's better not to use multi spark for small engines.
Posted on: 9/17/2012 11:42 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11231310

RE: CDI gr8flyer55
I changed the Exelsheet a bit with the extra code tab. It's not ready yet, but I hope Jake understand wat I mean with it. I dont want to change to much, maybe Jake have other ideas. link http://www.bucket.gompy.net/v0.9b3_rev3_incl_code.xlsx The change will be, the values of the curve will be writen direct to the code into the code tab. Not good #define Dwell_Time 500 // Dwell time, in uS, that output is kept on Better #define Ignition_Time 500 // Inigtion time in uS, SRC output is kept on 500 uS can be reduce to 250 uS I don't know wat todo with this #define MSD_Spark 3 // Total number of sparks per revolution when RPM is below Max_MSD_Rev (at least 1) #define MSD_Low_Spark 4 // Total number of sparks to fire when in LowRPM mode (below 915 RPM) #define MSD_Start_Spark 5 // Total number of sparks to fire on the first start spark #define MSD_dDeg 5 // DigiDegrees between multisparks (1 = 1.4 deg)(dwell time not accounted for) #define Max_MSD_Rev 79 // Maximum RPM (in terms of CurrentRev + 1) to use MSD (78 = 3,005) If you ask me personal, leave it out of the code or only 2 sparks max at low (<2500) rpm.
Posted on: 9/17/2012 10:14 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11230927

RE: CDI gr8flyer55
[quote]ORIGINAL: jakestew One thing to point out is that if your hall sensor is at 30 deg, you can't have a 30 deg advance setting![/quote] I think you can't find a engine with a ignition more then 30 degrees BTDC. The highest I can find will be 23 degrees BTDC, this will be a very large engine and a low rpm runner. This kind of engines need the time after ignition to burn all the petrol. Our engines, 25 till 50 ccm have 18 or maybe 20 degrees BTDC. Why we will the pickpuppoint to 40 degrees...we need the time to calculate the real ignitiontime. The real ignition it selfs must be between 0 and 40 degrees BTDC, above 40 degrees BTDC is not possible. BTW, forget multi spark. Into a big room you need multi bulbs to light up te room Into a small room you need only one bulb to light up te room and sometimes even one bulb is given to much light. Our engine have a very small cilinder and we put less petrol into this engine like they do in cars. Both engine have one cancle to spark up the petrol. Into the car engine the have to fire a lot of petrol, so they need more sparks to burn all petrol. Our engines have also one cancle, but the petrol we put into our cilinder is lees then they use into a car engine. So why do we need multispark........it takes only energie we need so bad for this one heavy spark we can make with the HV-board.
Posted on: 9/17/2012 3:49 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11230810

RE: CDI gr8flyer55
And I make it more diffecult to chose, I put a extra diode near C5 [image]http://www.bucket.gompy.net/cdi-e.jpg[/image]
Posted on: 9/17/2012 2:41 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11230774

RE: CDI gr8flyer55
I ask Jake todo the same with the Exelsheet we (JMJ and I) do befor. Into the first tab the curve generator and into the second tab the complete code with the changes you have make into the first tab. Only a copy / past from the code of tab two into MPlabs to compile must do the job without any faults.
Posted on: 9/17/2012 1:10 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11230731

RE: CDI gr8flyer55
This will be a normal 2stroke ignition curve. Started at ~5 degrees BTDC (easystart), at 1000 rpm back to the factory settings of the ignition (~28 degrees BTDC) and when speedup back to ~5 degrees BTDC. [image]http://i45.photobucket.com/albums/f75/MattR250/Husky/2008%20CR125/ignitions/CR_WR125_timingcurves.jpg[/image]
Posted on: 9/16/2012 6:11 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229877

RE: CDI gr8flyer55
BTW, befor instal MPlabs and compiler you have to uninstall / remove all old files. MPlabs will collect al you need by them self. After instal MPlabs you have to install the compiler.....not befor or with old MPlabs version. If you still have done, you have to remove also the compiler files.
Posted on: 9/16/2012 5:49 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229856

RE: CDI gr8flyer55
[quote]ORIGINAL: jakestew Step by step, how to get started...  I've tried to make things as easy as possible, but it still takes a little doing to get your own custom CDI firmware up and running.  Unfortunately, I don't have any compiled versions that I actually know to work, so if you work out a good curve and settings please post it here or send it to me at my email.  Hopefully we can get prefab versions ready for the common engines out there. #1.  Go to   <a href=''http://www.microchip.com/pagehandler/en-us/family/mplabx/#downloads''>http://www.microchip.com/pagehandler/en-us/family/mplabx/#downloads  #2.  Download the ''MPLAB X IDE'' and ''MPLAB XC8 Compiler'' for your operating system. #3.  Install the IDE and compiler.  Default settings should be fine. #4.  Open the IDE and... -Select File->New Project -Choose ''Standalone Project'', click next. -Select Family -> Mid-Range 8-bit MCUs (PIC12/16/MCP)[/quote] You have to change this line into the right PIC-type: PIC12F683 [color=#CC0000][b]-Select Device -> PIC12F675 Click next.[/b][/color] [quote]-Debug header does not matter, I usually select the one you can choose, now click next. -Select ''Simulator'' under hardware tools, or choose the programming device you use. Click next. -Select ''XC8'' under XC8, click next. -Choose a project name and location.  I usually use a more convienient location than the default.  You might use ''12F683_v0.9b'' for the name. -Check ''Set as main project'' and click next. -Copy the source file ''12F683_v0.9b.c'' into your project directory. -On the left hand side of the MPLAB X IDE screen right-click on ''Source Files'' under your project name and select ''Add Existing Item''. -Select the source file ''12F683_v0.9b.c'' and hit OK. -Double click the  12F683_v0.9b.c source file that now shows up.  This should bring up the source code. -Select Run -> Build Main Project, from the menu.  Source should compile with no errors. -Congrats!  You just compiled the code!  You know things are working, so any new errors are your own doing. -Now edit the source file, adding your custom table and the settings you want. -Use the included spreadsheet to make your advance table and help figure out the settings. -Build the project again and the .hex file should be in [Project Directory]\dist\default\production -Now you can program the .hex file into your processor via whatever method you prefer. I realize this is a lot of downloading and hassle if you're not into this sort of thing, so I'm happy to compile for people if you email me exactly what you want compiled.  You can edit the source with just a text editor and send it to me and I'll do the work for you. -Jake [/quote]
Posted on: 9/16/2012 3:20 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229793

RE: CDI gr8flyer55
[quote]ORIGINAL: jakestew Glad to see this thread picking up some steam! The coil in the pictures above looks a lot like the one John sent me.  His coil is already potted in epoxy and seems to throw some very long killer sparks.  [/quote] DON"T DO THIS, YOU DISTROY THE COIL !!!!!!! A CDI-ignitioncoil is make to produce small very intensive sparks - not long sparks (not great distance between the leads !!) [quote]I looked for the source that your CDI was using, but couldn't find it.  I had heard that there was trouble licensing it as open source.[/quote] The programmer I "rent" will do it for free, that was a reason why we don't get the source. And also a part of the source was allready sold and now will be used into a real (CDI) product. [quote]For sure!  I'm not even actually using a pulse generator.  When I say ''simulator'' I mean the entire timer board circuit (and a pulse generator) is simulated on the computer.  My problem at the moment is that I don't currently have a CDI engine working.  My GF also won't let me run an engine in the house for some odd reason, and I haven't loaded my laptop with the compiler yet.[/quote] I use a electric rc motor to test the CDI's, same Neymi will do. A small variable powersupply speedup the engine and a magnet into a plastic flywheel is my ignitionpoint and a hallsensor the sensor for the PIC. I'll try to instal the new MPlab version on a old laptop, but I don't know if the laptop can handle this kind of software. I don't want to instal the software on my workstation, I need this to make my money ervery month [:D]
Posted on: 9/15/2012 2:55 PM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229540

RE: CDI gr8flyer55
OK, this coils work well untill 12,000 rpm......with epoxy isolation, without untill 2 minutes [:D]
Posted on: 9/15/2012 12:08 PM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229433

RE: CDI gr8flyer55
I found the coil, not the discription
Posted on: 9/15/2012 12:02 PM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229426

RE: CDI gr8flyer55
They look the same to me we can buy into the Netherlands. http://heetgasmodelbouw.ridders.nu/Webpaginas/pagina_blokker_vonkcircuit/blokker_circuit_frametekst_engels.htm [image]http://heetgasmodelbouw.ridders.nu/Webpaginas/pagina_blokker_vonkcircuit/foto_-aanpassingen_reed_juli2012.jpg[/image] After buying the device you have to isolate it otherwise the you distroy the coil. I think I have given the coil from Roy away, I can't find him anymore.
Posted on: 9/15/2012 11:55 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229423

RE: CDI gr8flyer55
A common problem will be the moment when the magnet the hall will trigger. If the magnet is to close to the hall, the triggertime will be differend when if the magnet is only 1 mm futher away. Even if the speed change of the engine the ignitiontime will be changed too. Test with a pulsgenerator is not the same if testing with a real engine. @ Adrian, are your sparkcoils the same I mention into the link a few pages ago ? I have also buy a very small grey ignition coil from Roy (S/S Machine & Engineering) but this coil didn't work at high rpm. It quit at 6 or 8,000 rpm and didn't start again without switching off the power. @ Charlie, have you try to compile the C-code with MicroC compiler like we do with our first CDI of JMJ ?
Posted on: 9/15/2012 11:15 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229378

RE: CDI gr8flyer55
At low rpm (<1500) multispark can be used, no problem, but at high rpm (>1500) it's only a wast of time to load the capacitor. Again, CDI don't have dwelltime. Any time you lose between two sparks is less load of the capacitor and less powerfull spark. Easy start is a "must have" for allmost all engines, even for fourstroke engines. Easy start for 2stroke wil be at ~5 degrees BTDC, 4stroke need more ~20 degrees BTDC. It will be nice if we can make the degrees for easy start into the setup. BTW, maybe you have to take a look at my website and try the program. There is also a website of the first CDI with a Exelsheet. Maybe it can help you to create your Exelsheet, copy / past the complete code into MicroC aso.
Posted on: 9/15/2012 8:12 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229211

RE: CDI gr8flyer55
BTW, to test multi spark you need a 6 bar pressure chamber to put the candle in it. I can ensure you, there is only one spark.......the first one and all others are gone. Why, the capacitor don't have enough power to spark the candle. You need atleast 50 mJ for a spark and the HV coil can't make this power within this sort time.
Posted on: 9/15/2012 5:01 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229120

RE: CDI gr8flyer55
Dwelltime is nothing else then the time the (6 or 12 Vopt) ignitioncoil need to charge. A nornal ignitioncoil / bobine can't make multispark becaus the time to charge the coil wil be to long (2 till 4 ms) Only racecoils can make multi spark, they don't use al the energie for one spark but this wil cost a lot of power electronics to do it. We don't use multispark for our small engines, only big engines need multispark to burn all the petrol. Big cilinder, lot of petrol, more sparks needed to burn all the petrol - small engines, less petrol, less sparks needed to burn the petrol. I realy don't know why people want to have multi spark ignition, there is no petrol to burn [:(] For CDI you don't must reduce the load time for the capacitor (1 uF / 600 Volt), you need all the time you have to load it for the best spark.
Posted on: 9/15/2012 4:19 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229100

RE: CDI gr8flyer55
Jake, CDI's don't have dwelltime only TCI have dwelltime. http://www.sportdevices.com/ignition/ignition.htm
Posted on: 9/15/2012 1:42 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11229048

RE: CDI gr8flyer55
There are make a lot of schematics the last couple of years and not everyone knows wat code belong to wat schematic. My idea, make a complete package from al the files we are using into the zip-file. Why, I found 4 differend schematics into this topic.
Posted on: 9/12/2012 3:13 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11225851

RE: CDI gr8flyer55
Is't possible to get a free RPM programmed pin out ? I need it to open a extra petrol valve for burst at ~8000 rpm.
Posted on: 9/11/2012 4:11 PM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11225469

RE: CDI gr8flyer55
I don't know if I posted befor, but this coil spark like hell ! http://heetgasmodelbouw.ridders.nu/Webpaginas/pagina_blokker_vonkcircuit/blokker_circuit_frametekst_engels.htm
Posted on: 9/11/2012 4:25 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11224768

RE: CDI gr8flyer55
Is this a compliment for all the work I have done the last 8 years ? Nyemi, now you know wat they thinking about you if there will be a "new" guy in town. Goodby to all, I quit.
Posted on: 8/5/2012 9:42 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11181638

RE: CDI gr8flyer55
I don't understand the changes you have make, sorry.
Posted on: 8/5/2012 5:52 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11181469

RE: CDI gr8flyer55
This schematic / CDI is not the same John have made ! Thats why I say with a SCR, in Johns schemattic, multi-spark is impossible.
Posted on: 8/5/2012 4:24 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11181428

RE: CDI gr8flyer55
Multi-spark with a SCR is impossible.
Posted on: 8/4/2012 7:17 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11180624

RE: CDI gr8flyer55
I am very curious how it's possible this small transformer start charging the capacitors to generate 3 sparks for one ignition.
Posted on: 8/3/2012 1:58 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11179347

RE: CDI Summary (The New, New CDI Thread)
Ask Howie, http://www.rcuniverse.com/community/profile.cfm?section=profile&forum=1&memid=41842
Posted on: 7/28/2012 5:49 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11172078

RE: CDI Summary (The New, New CDI Thread)
Good luck !
Posted on: 7/27/2012 3:12 AM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11170957

RE: CDI gr8flyer55
I like the way you thank us for all the hard work we have done. BTW, within a few months you can buy our soft-and hardware into the stores. Have fun with th exelsheets and compilers, now you can do wat you want......
Posted on: 3/29/2012 2:29 PM by Author "Gompy" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11020227