Printable View
hi all
we have decided to make a new robot (my dads) we are using 2 12v drill motors and their batteries. but i wired it all up but it didnt work,
the batteries were charged, there was voltage at the motors so the spedd controllers are suppling the power for the motors and the rx. but no power seems to be getting to the rx and therefore nothing will work.
we have checked everything, just used one battery and motor and even tried a SLA, but nothing.
WHAT TO DO?
cheers alex
What speedos are you using?
You reliying on the speedo supplying power to your RX or do you have a seperate battery for the RX?
is the servo wires and (rx battery) connected to the RX the right way round?
Mr Stu
Do the speed controllers have BECs (battery eliminator circuits)?
the ones im using are from tech bots
and yes the wires are correctly connected
1500-014/015 Microprocessor Speed Controllers
Thanks
have you connected the two wires coming our of the one with the bec(normally orange) together?
and yes the wires are correctly connected
Ummmm ..........It may seem that way but a wiring error is often the cause.
Have you tried with a receiver battery and without the BECs connected ?
Its possible your receiver / transmitter may be faulty.......have you checked that it all works with a standard servo and battery setup?
Troubleshooting! First thing to do is to reduce everything to seperate units and make sure each of them works. So:
-Plug your receiver into a servo and see if the transmitter operates the servo.
You said: no power seems to be getting to the rx and therefore nothing will work
Try running the receiver on its own
battery and see if that solves the problem.
Things often dont work the first time. Often the answer is easy but it does not appear that way. (Ive been unhappy with a robot that fails to respond only to find that that the transmitter and receiver cystals were not on the same frequency). Your problem may be an easy one you have not yet cracked. Keep trying.
I agree with John on this one, the problem is usually something very simple which will be easy to sort but difficult to track down.
If you are using a BEC from the speedos, did you see if a voltage was coming from it to the receiver?
hi all and thanks
the reciever and transmitter im sure isnt faultly because it from Psycho fling.
im sorry but i havent a clue what BEC is or what is does?
thanks again alex
good news
we have managed to get it working forward,reverse, righ and left. but only with a external battery box for the reciever. can these be used in battles as it has it own switch?
thanks
Well done.
A BEC is a battery eliminator circuit - it is a function found in some speed controllers which provides power to run the receiver. Yes, you can use a receiver battery with its own switch for a fighting robot. Remember to turn the receiver on before you put your link in, if you do it the other way you are likely to fire any weapon you have and the drive motors will twitch the robot.
Your 1500-015 speedo has a BEC, this will have two orange wires coming out of it, these have to be connected together to turn on the BEC, these wires are supplied if you wanted to put a switch, but the best thing is to just leave them connected so you RX powers up when you put your link in.
If you do this, only connect up the orange wires from one of your two speed controllers. Leave the BEC of the other one off to avoid possible damage to your receiver.
neither have any orange wires, the ones in Psycho fling do but these ones dont Are they nessecary?
thanks alex
It depends on whether you want to use the BEC or not. If you want to use it, you will have to turn it on. If you dont want to use it, just carry on with using a receiver battery.
one should have the orange wires, do the speedos have the same model number on them one whould be FR15HVR? if you ordered one with a BEC then i would get in touch with technobots. You can operate the robot without the BEC and use a RX battery, just make sure you keep it charged i remember to turn it on/off.
the ones in Psycho fling do .......Could you not simply swap one speed controller from each bot?
well what i meant by that is that one of them has two orange wires coiled
so what now
alex
I believe that these two wires should be connected together IF you want to use the receiver WITHOUT a seperate battery.
Power to the receiver will then be supplied from the Electronize via the red and black receiver wires.
how do you mean connected? end to end?
thanks
Yep, just solder the 2 loose ends together, put some insulation on and ignor the connection, then you can get rid of your reciever battery.
well at the moment in psycho fling where they are they are just twisted together and i dont use a reciever battery.
alex
Confusion .....
Heres your alternatives as I see them from information gleaned from your posts .....
IF your new robots electronize controllers have NO orange wires use a seperate receiver battery.
IF your new robots Electronize controllers have orange wires you can connect one pair on one speed controller and you can do WITHOUT a receiver battery.
IF the Electronize Controllers in Physco Fling BOTH have orange wires and the new bots Electronize controllers dont ..........then it MIGHT be possible to swap a controller with orange wires (from Phsycho Fling )for one without ( from the new robot )........thus giving a controller with orange wires and therefore a Battery Elimanation Circuit in each.
The last alternative depends on ALL the controllers being essentially the same....... apart from the B.E.C.
OK THANKS FOR THE HELP
alex
or use the orange wires in the way they were intended and put a switch in between them, so that you have a reciever on/off.
James ....Scroll up to the post from Alan Young.
No...dont bother.
Ill reproduce part of it for you .
Your 1500-015 speedo has a BEC, this will have two orange wires coming out of it, these have to be connected together to turn on the BEC, these wires are supplied if you wanted to put a switch,
which nobody has actually advised him to do Woody.
I did read Alans post.
Im not actually bothered if he puts a switch on it or not, but with all the great advice hes getting, thought I suggest this aswell.
if he decides to use a battery, whch it looks like he may have to if he doesnt have enough of the bec type, then a switch is a must.
hope this helps.
Most help full:kiss:
Thought i would just bost this here . I got the IBC in my robot working , i was driving around and getting used to the feel of the robot . I went up a slight bump and the robot stopped still .
I examined the IBC and i can see nothing wrong with it , except that when i connect a battery to the - and + terminals the yellow led doesnt go on , but if i plug the servo leads into the Rx the light does go on. I know the batteries are working so that isnt the problem . I am using anderson power poles if thats any help .
Thats similar to what happened with my second IBC, had been driving it around, batteries started to die so drove it over and it just bumped the wall and stopped, i assumed a wire came loose but found the IBC had blew. I hope this hasnt happened on yours. So best thing is to check all wiring and meter inputs ect make sure power is getting there.
Which yellow LED do you mean, your power light?
No , there is a little diode that is on the IBC that lights up when there is a voltage connected to the IBC , I have examined the board of the IBC and i can see nothing has blown , so I am guessing it is a loose connection somewhere .
check the underside of the IBC as it blew a track on the pcb not a component. Is the jumper secure on the IBC for the BEC option?
Nope no track blown on the IBC , and the BEC jumper is on , but still cant get it to work :sad: . May have to bring it to the next event I am at and get someone to look at it , but i am still searching for the problem .
Ok took it to the guy that does my electrics today . The voltage from the battery is getting down the battery wires , so it wasnt a loose power pole . Still have no idea what the problem is though . If worst comes to worst ill have to ask someone for a lend of a speedo for the FRA Champs :sad:
Alistar i have 2x 15amp electronize controllers if there any use to u? , im at the champs all week, i have nothing better to do
Thanks alot Craig ,I will keep that in mind . My robot is running 4 x 18v drills @ 24v if thats any help .
Alistair, If you end up running with the 15amp electronize i would only use 2 of the drills as 4 may smoke it.
If worst comes to worst and that happens you can just extract the gears from two of the drill gearboxes so that two of the wheels can spin freely
I run 4 x 18v motors at 24v on Dragon 2 from 2 Electronize 15amp controllers blew the fuses a couple of times so put 20amp fuses in blew these once but have not had a problem with the controllers for the last 10 months
(Message edited by dragonmaster on August 14, 2006)
i run 30 amp fuses in the 15 amp electronize without problems. if you are worried, turn the gain down so each drill gets 18v, this is still pretty powerful, and 4 drills at 18v is better than 2 drills at 24v.