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United States, TX, San Antonio
Joined Feb 2007
12,758 Posts
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Nicely organized and detailed ESC mod thread Nek! Added to the Quadrocopter and Tricopter Mega Link Index
Cheers, Jim |
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Just peeled the shrink off of one of my Exceed-RC Proton-18A's and what do you know. There is a nice red board under that black heat shrink. Even has HobbyWing ID on it. I verified the pin-outs for the pads to be identical to the HW25A in the first post. Haven't tried programing yet. Waiting on 2 new motors and one new ESC after last crash.
I could bodge up a programer using a Pro Mini or Nano but I have a USBASP coming in the mail so I will wait till then. I will report back after I attempt it. Rob... |
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Joined Oct 2010
512 Posts
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I have just completed the successful hardware mod of six ExceedRC Proton 30A esc's to work with an MK using i2c control.
The firmware I used was pre-compiled into hex files by ArthurP. The firmware files were named "TGYPxxA2007v0100TwiNoCalM01.hex" and went through "TGYPxxA2007v0100TwiNoCalM08.hex" (of course, I only used 1 - 6). The question I have is: If you implement TC's i2c patch into your newer code (and maybe provide some hex files) would an improvement be realized? if so, I'd be glad to re-program mine. (I have not yet mounted them to a bird to test them in flight, I have only connected them and tested them in MKtools.) Thank you! |
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Old hex files are junk, simonk made a lot of useful changes to the PWM range etc.
With his changes its probably even possible to support 10bit stuff from BL2.0 if properly implemented. Anyhow, seems there's no lack of people willing to waste time cutting apart wires to get I2C controllers, lol. |
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Canada, BC, North Vancouver
Joined Dec 2010
895 Posts
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Quote:
I have made a few other changes, like always going with the latest received PWM instead of the first since the last check (slightly less lag), and it runs at 16MHz now even on the 8MHz boards, which doubles the PWM clock, allowing for ~10-bit PWM at 18kHz / ~11-bit PWM at 9kHz. This only matters if your flight controller outputs more steps, though. The original kapteinkuk code works with -100 to 100 in 16.16, now 16.8 with the latest release, and then scales up to round microseconds without throwing away bits. Mike's C port just did all of the mixing with integers but still the same range, so was (is?) much more granular (steps of 4 microsconds during output). My fork does it in microseconds (steps of 1 microsecond) with 16-bit and 32-bit integer math, but hasn't been updated with the PI stuff yet, so kapteinkuk's assembler versions should be as good or better than this: https://github.com/sim-/kkCheers! |
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Well I just finished assembling a quad to test my reflashed 10A RCTimers properly and something went veeeery wrong. First just when I wanted to check motor rotation with no prop ons just giving it a blip of throttle made one of the FETs pop! ESC was still running after wards, so I figured I might as well solder the rest and give it a go. Well it is not pretty at all!!! They barely turn the motors and they get hot so fast.
I have also tried on this quad a power distribution board made from a two layer copper clad pcb. The top traces is pretty much a ground plane, bottom one a power plane. Maybe it is not enough to carry the amps needed by each motor and the reason why it is not working at all? I know my motors draw something like 12A at full throttle with the props I am using so I knew a 10A esc was asking for trouble but still... I have some 18A lying around and will try them with a regular wire power spider and see if that works. I'll bring the power ditribution PCB back into play once I am sure it is not the culprit! |
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Quote:
That's what the power distro looks like, don't mind the + on the top, it is the ground, photoshop mishap
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