Search found 18 matches

by sim
Tue Jun 25, 2013 1:32 am
Forum: ESCs, propellers , servos and radios
Topic: Simonk ESC vs standard (my opinion)
Replies: 14
Views: 2834

Re: Simonk ESC vs standard (my opinion)

That's not what I said, I don't think. In the case of my code, I measure at CPU clock speeds and scale to 16-bit PWM steps. So, 1ms typically shows up as 16,000, and 2ms shows up as 32,000, and the 16,000 values between those points is scaled to fit in POWER_RANGE (800 steps, by default, to keep it ...
by sim
Fri Jun 14, 2013 11:37 pm
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

I just flashed my rctimer 20A (simonk version) to wii-esc. The process went fine. I just tested the quad on a jig for the moment, but I already feel a smoother behaviour. However, I have the feeling that the motors are louser than with simonk. (there is a treeble sound, like a whistle) that was not...
by sim
Fri Jan 11, 2013 5:05 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Hi, aggressiva! What power supply were you testing with, or was that with a LiPo? If using a bench supply, it may have not sunk any of the current/over-voltage as the motor slowed down, but I would not expect the capacitor to go unless it was well over its rating for some time. Perhaps it was damage...
by sim
Thu Dec 06, 2012 1:55 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

No problems with them removed. It advances the timing slightly and helps starting on some motors. I just don't typically bother mentioning to remove them since it causes all of this these questions and confusion. By the way, the safety feature to prevent accidental starting...I just went with a very...
by sim
Fri Nov 23, 2012 1:38 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

otti20vt wrote:Last Sunday i flash 4 ESC with Wiiesc and it looks like this firmware are slightly better then SimonK...


hello! Just out of interest, what do you like better about it?

Simon-
by sim
Thu Oct 25, 2012 6:57 pm
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

In src/hal/bs_nfet.h, for example, included by core.h. See makefile.avr.
by sim
Mon Oct 01, 2012 8:59 pm
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

I have tryed last "fetkiller" release on my micro, and found some anomailies in recovery algorithm. This is the video: m Hello! I think the problem is actually not with the recovery algorithm but with the ZC filter and/or DC bias cancellation stuff, where it keeps falling from running mod...
by sim
Wed Sep 19, 2012 8:53 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Hello! Oops, sorry, I forgot to check here for a while. Hi Simon, I was also looking at making an EEPROM block area for configuration (reverse, brake, timing, and maybe some other options). I wonder if we should try to make something standard / compatible? Good idea! Currently I use really simple la...
by sim
Thu Sep 06, 2012 9:31 pm
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Hi, ziss_dm! I was also looking at making an EEPROM block area for configuration (reverse, brake, timing, and maybe some other options). I wonder if we should try to make something standard / compatible? Also, are you shipping wii-esc with a boot loader that is in any way compatible with multiwii, a...
by sim
Thu Aug 30, 2012 9:18 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Simulation: m That simulation is awesome! Maybe I don't need a 4-channel scope after all. If you set the PWM duty higher, such as 0.95, you can even see the demagnetization start to cause the early comparator swing. Lower phase resistance and higher inductance makes it even worse, as expected. Star...
by sim
Wed Aug 29, 2012 7:49 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

* In your scheme there are no integrator to "remember" previous errors. * 1 bit SDM automaticaly varying base frequency to fit resolution and minimum on/off time. As a result: * Lower switching losses as FET's have enough time to properly open/close (currently min on/off ~4us) * More line...
by sim
Wed Aug 29, 2012 12:43 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Hi Simon, How is your vacations? Actually there are no divisions and even timer interrupts. There are only one interrupt source enabled, which is INT0. So, i would guess you have BEMF filter caps still in place. It does not like them any more Our vacation was awesome, thanks! I didn't miss flying u...
by sim
Tue Aug 28, 2012 7:15 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Hi, ziss_dm! (and Heiko and others ) I just tried 2.0.4 (and SVN head) on an F-30A board. Starting seems much improved, pretty cool! I did notice on an MT3506 and a Turnigy/Keda 2213 1050KV motor that the throttle seems to have some bumps, with either normal or complementary PWM. It seems like a sig...
by sim
Fri Oct 28, 2011 1:49 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Well, there are a couple of problems here. I saw your problem originally on Plush at 15.8V, with a 10x4.7 prop on the MT3506. I made some changes, and it was totally fixed for me, so I was happy, and posted, and you said it didn't fix it. So, I ordered a BlueSeries 20A and 30A. The stock firmware se...
by sim
Wed Oct 26, 2011 5:44 pm
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Hi, Heiko! I didn't realize you saw problems even with slow throttle increases. Does this also happen with my tree? I thought it was only a fast response change problem. This is with a 14" APC prop? It's possible that the motor is just saturating due to too much current. It's rated for 14.5A an...
by sim
Mon Oct 24, 2011 8:39 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Are you concerned about the input voltage dropping causing the resets? I was seeing VCC drop to below 2.7V on the scope, but only for about 100ns, and it's an oscillating impulse at about 10MHz. Some kind of miller effect or noise is causing the resets, not the input voltage, since the input voltage...
by sim
Sun Oct 23, 2011 12:14 am
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Hi Simon, How was your test? regards, ziss_dm Hello! With r72, the MT3506 motor actually seems to run quite well, without losing timing (or recovering well, I can't tell ) better than my current tree. However, I can still cause resets on this BlueSeries 30A all-nFET board while accelerating, on 15V...
by sim
Tue Oct 18, 2011 11:57 pm
Forum: ESCs, propellers , servos and radios
Topic: Alternative ESC firmware (reflashing)
Replies: 640
Views: 136095

Re: Alternative ESC firmware (reflashing)

Hi, ziss_dm, quax, Heiko, all! It looks like ziss_dm and I have been doing a lot of the same stuff. When Heiko was reporting the same problem with the fork of quax' tree that I have been maintaining at m , I came up with the following which solved the problem on my Plush test board: m All that does ...