|Jul 07, 2012, 04:12 PM|
|Jul 08, 2012, 09:49 AM|
Here are the various brake speed hex files for 2 out of the 3 different versions we have seen.
Would suggest to start with brake speed 5 and then if needed move to 6.
I will try a Hacker 2 pole motor soon and think that for this brake speed 5 should be enough.
|Jul 09, 2012, 03:54 PM|
Joined May 2005
Which set up would not brake with this prop before?
What do you mean by hotter? Higher Kv or bigger prop?
Higher Kv with smaller prop normally brakes better. Motor has lower resistance and prop has less torque?
Maybe have to check temperature logs before going lower in number of seconds.
|Jul 10, 2012, 04:14 AM|
My Red Brick has an ATMEGA8L processor on a green board. The FET's are marked NIKOS P04038BD.(yes that's a 4 not a 6 as in P06038BD referred to in your post on page 1 of this thread) I assume the processor is not MLF as there is no MLF in the name printed on the processor and it looks exactly the same size as Joe's pictures on page 1 of this thread. The full description on the top of the processor is:
It appears that this processor is limited to 8MHz. I am disappointed as I use hacker 2 pole motors and run them at about 10,000 RPM and therefore high commutation rate.
So Is this the ESC where I need to have a fire extinguisher handy?
|Jul 10, 2012, 04:49 AM|
Another 4 flights yesterday after nearly meeting up with Eric at Luton airport.
Total now stands at 15 flights.
George, that big 18x22.5 never wanted to brake very well on my other setups like the 3400KV Hacker on 6S with a P180 but then i never tried 'immediate' on the brake settings and that may have done it. I also flew this prop with a Neu 1512/2.5D on 10S with a P85HV and that was awefull in terms of barking brake. Changed that to a B50 13L and suddenly it was sweet. With hotter motor i mean just that, higher KV. This motor i am running now is not a typical motor being used out there, more typical would be a 1512/1.5D and this will put the power up a bit.
Anyway, i am just happy to see the brake work so well and the current run time is very respectable. So we will see later when i reach 50 cycles.
Steve, the TQFP or MLF is not printed on the processor. It's just the name of the type of packedge. MLF is very very small like the one in post #14. The TQFP packedge is simply a lot bigger. The processor is otherwise the same, mine is an 8L also.
Don't worry about the other numbers or any reference to 8Mhz, as long as there is an external oscilator (the 5 layer gold/white thing) you can run it at 16Mhz and the firmware files i posted above will work. Just to be sure you use the correct files, please post a picture of your logic board!
Also regarding the fets, i wouldn't worry to much about it. I have not seen the spec sheet of those but really it's not likely to make a huge difference. Just try it and see. Measure the temperature during flight.
Here are the fet temperature vs W.min used graphs from yesterday.
|Jul 10, 2012, 05:09 AM|
This is the third option we have seen and it uses the hk200a.hex files, currently not available with the brake settings.
Note that if your ESC does not EXACTLY look like one of these, you should post a picture and/or try to check if it matches any of these pin layouts. You are looking at the connection arrangement between the fet drivers and the processor. It's just the inside 2 legs of the fet drivers.
|Category||Thread||Thread Starter||Forum||Replies||Last Post|
|Discussion||NeXtcopterPlus open-source release for KK and KK+ boards||HappySundays||Multirotor Electronics||812||Jan 09, 2013 03:10 PM|
|Idea||Motor, ESC, battery DYNO open-source project||Mastino||Power Systems||4||Jul 09, 2012 11:16 PM|
|Discussion||Any Open Source / CC CAD Files for gliders?||DrFragnasty||Composites Fabrication||8||Apr 09, 2012 05:36 AM|
|New Product||Rock ESC - a new open source ESC in town||hols||DIY Electronics||26||Mar 23, 2012 04:52 PM|
|Question||Graphical designer for Open Source FrSky Android Dashboard||Takilara||DIY Electronics||2||Dec 09, 2011 07:38 AM|