17LikesHobbywing XERUN XR8 Plus
10-31-2015, 06:28 AM
#228
Update:
I removed the power wire from the ESC to the receiver. I then ran wires straight from the battery to the receiver. I'm running a 2S lipo with a high voltage servo. No more brown outs. This makes sense from an EE perspective as a voltage regulator will have some voltage drop and under heavy throttle the battery voltage droops thus taxing the BEC regulator even more. On a 2S 7.4V in and expecting 7.4V out isn't going to happen especially when the battery voltage dips to 6V. I also adjusted the BEC output in the settings to the lowest voltage hoping this might help in some way the internal circuits of the ESC. I would expect this same behavior on all makes of ESCs. Ways around the problem exist but not going to happen for $200 or less.
I removed the power wire from the ESC to the receiver. I then ran wires straight from the battery to the receiver. I'm running a 2S lipo with a high voltage servo. No more brown outs. This makes sense from an EE perspective as a voltage regulator will have some voltage drop and under heavy throttle the battery voltage droops thus taxing the BEC regulator even more. On a 2S 7.4V in and expecting 7.4V out isn't going to happen especially when the battery voltage dips to 6V. I also adjusted the BEC output in the settings to the lowest voltage hoping this might help in some way the internal circuits of the ESC. I would expect this same behavior on all makes of ESCs. Ways around the problem exist but not going to happen for $200 or less.
And I tried running my futaba 9352 servo strait from the battery once before, bypassing the the + - right off the servo to the pack, while the signal wire was left in place to the Rx as normal. I left ESC's internal BEC to run the Rx and I couldn't get my truck to stop glitching real bad with the servo wired direct like that.
I don't know if it would have had the same response or not if I would have just ran the battery to the Rx and bypassed the ESC BEC all together, but I was told by several it wouldn't matter how I chose to do it, it should work either way. All I know is it wouldn't work worth a damn wired that way and I ended up going back to a CC adjustable BEC to fix my problems. Even had a glitch buster installed to help with the load.
The reason I am concerned is because I don't really see where this ESC is worth the money if I am going to have to bypass the internal BEC once again to an external unit to make things work as they should.
That is how my SCT-Pro is now and it works fine.
Personally I don't really see where the programming of this thing for my application is a huge bonus as much as the idea of not needing an external BEC is.
Last edited by Josh L; 10-31-2015 at 05:59 PM.
10-31-2015, 06:44 PM
#229
I didn't say it wasn't better, the fella I quoted above your quote ^ more or less said he thought it was giving him problems, so he ran the servo straight off the battery.
And I tried running my futaba 9352 servo strait from the battery once before, bypassing the the + - right off the servo to the pack, while the signal wire was left in place to the Rx as normal. I left ESC's internal BEC to run the Rx and I couldn't get my truck to stop glitching real bad with the servo wired direct like that.
I don't know if it would have had the same response or not if I would have just ran the battery to the Rx and bypassed the ESC BEC all together, but I was told by several it wouldn't matter how I chose to do it, it should work either way. All I know is it wouldn't work worth a damn wired that way and I ended up going back to a CC adjustable BEC to fix my problems. Even had a glitch buster installed to help with the load.
The reason I am concerned is because I don't really see where this ESC is worth the money if I am going to have to bypass the internal BEC once again to an external unit to make things work as they should.
That is how my SCT-Pro is now and it works fine.
Personally I don't really see where the programming of this thing for my application is a huge bonus as much as the idea of not needing an external BEC is.
And I tried running my futaba 9352 servo strait from the battery once before, bypassing the the + - right off the servo to the pack, while the signal wire was left in place to the Rx as normal. I left ESC's internal BEC to run the Rx and I couldn't get my truck to stop glitching real bad with the servo wired direct like that.
I don't know if it would have had the same response or not if I would have just ran the battery to the Rx and bypassed the ESC BEC all together, but I was told by several it wouldn't matter how I chose to do it, it should work either way. All I know is it wouldn't work worth a damn wired that way and I ended up going back to a CC adjustable BEC to fix my problems. Even had a glitch buster installed to help with the load.
The reason I am concerned is because I don't really see where this ESC is worth the money if I am going to have to bypass the internal BEC once again to an external unit to make things work as they should.
That is how my SCT-Pro is now and it works fine.
Personally I don't really see where the programming of this thing for my application is a huge bonus as much as the idea of not needing an external BEC is.
10-31-2015, 07:24 PM
#230
Tech Initiate
Is it better or worse? Do some testing and compare the results to what I have shared.
10-31-2015, 07:53 PM
#233
Tech Initiate
10-31-2015, 08:08 PM
#235
Tech Initiate
2S with the HW 4000 and 4300hd? Similar setup to what Im running with a SMC 4500 and a 2S Venom 100C pack. Any stuttering issues under acceleration? What settings are you using in the esc for timing and the acceleration boost (forgo the name)?
11-01-2015, 12:17 AM
#237
11-01-2015, 01:12 AM
#238
If you increase the EPA like your talking about, assuming you calibrated the full physical stroke range of the trigger, all you effectively have done is to short yourself on resolution. The bounds are dictated by what you told the ESC to do. Now if you calibrated the ESC with less physical pull that the full motion of the trigger can swing, then it will register the 100% end point before you actually get a full pull, which means you have now effectively created a dead section along the throttle.
Lets say you calibrated it at 75% pull. So at 75% of pull your registering 100% to the ESC value.
So with that being known, your not going to get more than you would at 75% through the remaining stroke from 75% to 100% swing of the trigger.
You just won't see a change and now have reduced the resolution once again, only this time on the physical side of the spectrum.
11-01-2015, 01:19 AM
#239
Wow... it's hard to believe what some people here actually believe about how these things work... 
But it certainly creates some funny reading.
(Just worried about the newbies to the hobby, who might actually believe some of the misinformation spread by some people 
)
11-01-2015, 02:43 AM
#240
That was about it. 27mhz and Mechanical speed controls where the standard in those days.
If I were handed something from today's industry back then it might as well have been a UFO. Here we are now with SMM chips, hyper-threaded processors and cell phones with 100's of time more power than our best desktops of the 90's.
But things are different now. The rat race goes well beyond capacitance overflow into the very root of social development. We are scarred with the idea of keeping up with trends and social acceptance to the point no one takes any real time to get in depth with anything anymore. It's rampant and easily revealed with one look at things people post about on facebook, and you name it alter reality entity. People want "like's" and will forgo anything of substance to get that instant gratification of worth.
My point is how it is insane how much a person really has to know these days to keep up with developments and still lead a normal life. And modern trends nearly hold no ground for realization or self correction.
There is almost no room much less the time to take it all in without missing out on something else...
The late great Carl Sagan put it this way> "We live in a world that is dependent upon science and technology, of which it's people know almost nothing of science and technology"...
I think it's obvious at this point it is up to us (those in the know) to concentrate on explaining things more freely with less contempt.
I personally love explaining things to people, regarding stuff they are ignorant about. I suspect it is one of the primary forces behind a forum that makes it a good place to be. I learn a lot still and always will I hope.