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27 February 2013 at 09:38 #39413
Jay
Participant
@jay
Hi I'm new to rc equipment and have just brought a mtronicks viper marine 15 for a Trawler I am building it's all set up correctly after a trip to the model shop for help however when I got it home I now have no reverse I haven't touch anything from when it was set up iv left the trims how they were set and just can't get it to work I since went back to the shop and the owner put it down to a dodgy esc we replaced it and it worked again but when I got home it stopped working in reverse again… Surely this isn't down to a dodgy esc again can anyone help I have re set up the esc since and still can only have reverse or forwards not both together I am using a tamco 4ch transmitter and reciever and a 12v 3.2 amp lead acid battery

thanks
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27 February 2013 at 09:38 #5213
Jay
Participant
@jay
Mtroniks marine 15
27 February 2013 at 09:45 #39414
LARRY WHETTON
Participant
@larrywhetton68737
Hi,

Send it back, you seem to have a dogey one…….i have had the same problem…

they will be glad to help…………..Larry……
27 February 2013 at 09:50 #39415
shipwright
Participant
@shipwright
Hello Jay,

Are you using the Battery Eliminator Circuit (BEC) to power your receiver or does your receiver run from a separate battery ? If you are using a separate battery for the receiver you need to follow the instructions on the Mtroniks sheet and remove the red wire from the 3 wire flat cable.

Ian
27 February 2013 at 10:58 #39417
Jay
Participant
@jay
Hi yes I am using the BEC it's just odd cause I've been out again this morning and brought another esc they assure me mtroniks is one of the best but still no reverse it's driving me crazy is there anything else that could be the issue as this is the third esc now surely my luck is not that bad that I've picked up 3 faulty ones…or is it? They work fine in the shop it's when I turn it off and then on again I loose reverse I've tried with different motors and radio gear and still have the same problems

cheers jay
27 February 2013 at 11:28 #39420
Malcolm Frary
Participant
@malcolmfrary95515
Was the check in the shop just on the ESC or the entire setup?

I've had problems in the past with silly things like the servo reverse switch being set to reverse on the transmitter. This totally confuses most ESCs that are computer driven as they expect it to be set to normal.

Does it go through the setup procedure using your TX OK? Light flashing red and green on switch-on, press button, light goes green for forward, red for reverse, sort of thing? If it does all that and still only lets the motor respond to one direction of stick movement, its broken.
27 February 2013 at 11:58 #39422
shipwright
Participant
@shipwright
Jay,

Disconnect everything to do with motor and ESC. Use a separate receiver battery. Plug in the rudder servo – does the rudder respond normally ie goes smoothly from hard to port to hard to starboard as you move the stick ?

What type of control lead does your Rx use ? – is it listed on the Mtroniks instruction sheet ? I believe that in some cases leads may need to be swapped (basically the 3 wire flat lead has +ve, ground, control ….. the colours allocated to those wires vary depending upon manufacturer) :

**LINK** see bottom left of sheet for wiring colour code …. "For some receivers you may need to swap red and brown leads in the plug".

Is the wiring in your boat essentially the same as in the photo on the Mtroniks instruction sheet ?

Ian
27 February 2013 at 13:09 #39424
Jay
Participant
@jay
Hi thanks for your reply yes the servo works fine with and without the esc connected and I don't really understand the wiring on the link I'm am using a tamco radio set.. I have just brought my 4th esc I have got it home plugged it in and set it up all works well but then I turned it off using the switch on the esc when I turned it back on I have nothing not even a light on the reciever just a red light on the esc..I have been on this non stop now for three days and am really disheartened by it all
27 February 2013 at 13:58 #39426
Dave Milbourn
Participant
@davemilbourn48782
Sounds more like a duff radio to me. Tamco?? Not even China's finest, but what do you expect for twenty nine quid? My advice would be to change the radio for a more reliable type (Futaba, Spektrum – even Planet) and/or try a different brand of ESC. These are fully autoset i.e. they don't need any button-pressing or stick wiggling to find forward, neutral and reverse. **LINK** They don't have BEC, but that may be part of the problem with your set…………… In my experience four faulty ESCs in a row is typical of only one brand – and it ain't the one you've been buying.

Dave M
27 February 2013 at 15:55 #39428
shipwright
Participant
@shipwright
In my limited (3 years) of model boating, all of the ESCs that I have purchased are Mtroniks – I have Viper Marine 40 Amp, Viper Marine 25 Amp and MicroViper Marine 10 Amp (all for brushed motors) – I also have a pair of Mtroniks G2 Hydra 15 Amp (brushless). All have worked perfectly from day one. In my experience as an engineer, many problems often come down to poor connections or incorrect connections. That is not to say that you cannot purchase a faulty unit – obviously there is no such thing as a perfect, flawless production line. In general, poorer quality products tend to be cheaper but price alone is not a reliable indicator of poor quality.

Does the manufacturer's (Tamco) sheet state what current is required by the receiver (the Mtroniks sheet says that its BEC can supply up to 1.2 amps).

You say that you don't understand the wiring diagram on the Mtroniks sheet – was the instruction on the wire colours understandable ? Does your receiver conform to JR type connections or some other convention ?

Ian
27 February 2013 at 16:36 #39429
Malcolm Frary
Participant
@malcolmfrary95515
The common factor seems to be the radio. During setup, everything may well be OK, but in "normal service", after powering up from the voltage received from the BEC in the ESC, the RX might be taking just too long to wake up and provide a viable signal for the ESC to lock on to. Daves suggestion of a separate RX supply might force everything to happen as expected, but, from experience, what the ESC is expecting to see when the setup button is pressed is first, a signal corresponding to stick neutral, next a signal corresponding to full forward, then a signal for full reverse. If the servo reverse is thrown, things don't happen in that order, and the ESC sulks in some strange default mode. A servo tester is awonderful thing, useful and versatile. Every home should have one.
27 February 2013 at 16:51 #39430
Jay
Participant
@jay
thank you all for your help I have managed to get a 5 channel planet radio set and the whole lot fired up instantly I quess it's all experience when it comes down to rc the reason I thought the reciever was fine was because it operated the servo with no problems but clearly it wasn't…I phoned howes models and turns out its the third one in two weeks that's been returned with the same problem…just wish he would have told me in our many previous convasations already this week rather then keep selling me esc…never mind lesson learnt and once again cheers for all your help its been sent back along with the speed controllers
28 February 2013 at 13:20 #39443
Dave Milbourn
Participant
@davemilbourn48782
I think this may be a "failsafe" issue with this particular brand of radio set. The object of the exercise seems to be to prevent a brushless motor in a model aircraft from firing up as soon as the radio is switched on. Very sensible but incompatible with a boat speed controller, which wants to "see" a signal where "stop" is halfway up the scale between full reverse and full ahead. "Stop" in an aircraft is throttle stick = all the way back.
My Futaba 6J will 'beep' when you power up the Tx if the throttle stick either is not all the way back or if you don't first move it there before centring it again. Once you've done the latter then it's OK to power up the receiver which will then recognize throttle centre = stop.
Perhaps there is someone out there who has a Tamco set and might experiment and let us all know the results?

Dave M

Edited By Dave Milbourn on 28/02/2013 13:20:54
28 February 2013 at 20:17 #39458
LARRY WHETTON
Participant
@larrywhetton68737
Hi Jay ,

There you go, you get what you pay for,

buy ACTION ESC next time , they are good and the back up is allways there ……

just have look at there wiring dirgrams…. unbeatable ……..cheers Larry…..
28 February 2013 at 22:49 #39464
shipwright
Participant
@shipwright
Although I'm sure that Action ESCs are very good it is only fair to reflect that the problem in this case appears to have been the Tx/Rx not the Mtroniks ESC.

Ian
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