Electrical Gremlin

[PJ-27]

I recently bought some cheapy ESCs from eBay which work fine except for one thing. There is a 1s delay when changing directions, which although sounding insignificant actually makes it impossible to drive!

Guilherme (Galactus) uses the same ESCs and doesn't have this issue so thinking it must be something my end I have swapped, changed and eliminated every possibility I can think of to no avail, so thought I'd open it up to the forum.

What I've done:
There is no delay on a servo.
Changed The Rx and Tx to a different brand.
Used an external Rx battery instead of the built in BEC.
I have stripped the system down to it's most simple, then complex and everything in between to see if that could make a difference, but nothing.

Any ideas?

[Anttazz]

Re: Electrical Gremlin

ESC is busted?

[PJ-27]

Re: Electrical Gremlin

They're both identical in they're behaviour though, which is what led me to believe it was something else.
I emailed the seller (eBay, Hong Kong) soon after and got some incomprehensible crap back about how I should use Futaba *sigh*

But now I'm pretty sure I have exhausted everything I can think of!

[calumco]

Re: Electrical Gremlin

did you feed it after midnight? I hear thats bad for them

[leorcc]

Re: Electrical Gremlin

Which ESC? ESC's with a relay setup to switch direction all have such a delay.

[PJ-27]

Re: Electrical Gremlin

It's one of these:
http://www.ebay.co.uk/itm/RC-Boat-Ship- ... true&rt=nc

Although from a different eBay seller.

I don't believe they do have a relay and my Electronizes which I know do have a delay nowhere near as bad as this.

[Bodge Job]

Re: Electrical Gremlin

I used those, I don't remember the delay being as bad as that! Although the did have a bit of a delay, and little control at lower speeds. But the delay wasn't as much as 1 second! They are burnt out now though so I can't really help you any more.

[plargen]

Re: Electrical Gremlin

i used them in 1 of my robots early on bit found that i got more speed from the sabertooth controller i had

i also used them to test out the wheelchair base unit i had worked fine a 14.4v but burnt out when i put the voltage up lol

[maddox10]

Re: Electrical Gremlin

Could be that the braking and acceleration ramps are very shallow to spare the components.
That's simply programation.

Oh well, Team RCC is going to try the BotBitz TZ85's.

[psycho_fling]

Re: Electrical Gremlin

i'd imagine it will be what mario suggests some in built protection - my old sabertooth did the same thing

so there won't be a fix im afraid

[RobotExtreme]

Re: Electrical Gremlin

Hi PJ,


How i already say, i don't understand the cause of your problem.
In past i used a normal unprogrammed TX with this ESC and don't had this problem.

For me the unique explication is that there was an modification in programation by manufacturer.

This can be a new protection against inversion of direction.

But nonetheless don't justify the delay in start.

Here my test with the same ESC:

http://www.youtube.com/watch?v=o0zv5I8cpK8


Follow the wiring diagram made for me, if somebody can help.


Guilherme Ferreira

[PJ-27]

Re: Electrical Gremlin

Thinking it may be a firmware change then.

I'm reluctant to do any hardware modifications if the issues lies in the firmware since it'll still be present.