Teething issues

[Danjr1]

Re: Teething issues

anyone else had any problems like this?

[Danjr1]

Re: Teething issues

just heard back from electronize and they said the speed controllers are fine and it must be interference?! surely if i have two ESCs (one running fine, the other not) running off each channel then any inteference would affect both ESCs (have a look at the youtube video)? they also said that a seperate receiver battery would be a good idea, any thoughts?

[Anttazz]

Re: Teething issues

Can't hurt to try that I suppose.

[Danjr1]

Re: Teething issues

got no other option really! lol. isnt there a trick where you attach a resistor to the connector tabs on motors to reduce interference?

[josh]

Re: Teething issues

do both esc have a bec? if you have the bec from both plugged into the reciever together the two will compete and cause issues. if that is the case just have the white single wire plugged into the receiver on one esc and the full 3 on the other.

someone may have already suggested this, I haven't read back through the thread...

[Anttazz]

Re: Teething issues

I think you're maybe thinking of a capacitor between the two connector terminals? Could try it I suppose, but I think that was more important back in the 40MHz days where interference was regularly as issue.

Replacing the BEC with a receiver battery or external BEC would probably be a better place to start I would guess, but I could be wrong!

[Danjr1]

Re: Teething issues

whats the way to work out the value of the capacitor needed? only have 1 BEC circuit which is external to the speed controllers.

[PJ-27]

Re: Teething issues

1 micro F I think is what is used on most RC Car's. + to can and - to can.

But you shouldn't be getting any interference from a 2.4Ghz set.

The large sparks look like the controller is rapidly forcing the motor to change direction, so could be signal drop out...

Neat looking robot though! I can't begin to imagine how frustrating this must be for you!

My only advise (given how strange this is) would be to start from the beginning, and go through the process of elimination.

New batteries in Tx, re-bind, try with servos and external bat pack, try with one esc and one motor, then the other, change the motors, try with bec no bat pack, both esc 2 motors, 4 motors etc......

It's a pain, but could be necessary.

[blazerbotics]

Re: Teething issues

Have you tried swapping the controllers onto different motors, you could be getting nasty spikes coming off the motors, capacitors across them will help with that.

[Danjr1]

Re: Teething issues

i did try and it seemed to sort it? but electronize seem unable accept that it MIGHT be their controllers. I think ill rewire the whole thing and probably test the system out of the robot. See how that goes then try the capacitors. If it is interference, i don't think its to do with the placement of the receiver in regards to the motors as all would be affected.

[Danjr1]

Re: Teething issues

I've moved the two working escs onto one channel now so the other two can run together when they get back to me. When you say 1 micro f, do you mean 1u (funny u thing) f? I'll pick some up from maplins on Monday. I wanna have it ready for Worthing but at this rate, I'm not too sure if I will! Was also having issues with the failsafes, where they would seem to completely mess up the signal to the escs and not set to the wanted point. And also does anyone know if and where they do big standard 5mm 24v LEDs?

[PJ-27]

Re: Teething issues

Yeh the micro symbol is the little u.

It's either 1 or 1000 micro farads...... have a look around google see what people say.

[blazerbotics]

Re: Teething issues

http://www.fightingrobots.co.uk/documents/emi.pdf

[Danjr1]

Re: Teething issues

I'm guessing overvolting a 18v motor to 24v would to crazy things to the emf?

[Danjr1]

Re: Teething issues

EMI..... sorry