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« on: January 12, 2010, 10:46:28 PM »
me-my-parts
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I have been buying electronics since the last month. Now i have all the electronics that work well.
Still when i connect them in the circuit there is no responce from the electronics(ESC, Motor, REC etc.)

Here is my circuit so please suggest me whats the problem.

i can't figure out any.(all my stuff is new)  Huh? Bang Head Bang Head Bang Head Bang Head

my circuit.jpg
i have a serious problem.
* my circuit.jpg (7.04 KB, 388x202 - viewed 489 times.)
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« Reply #1 on: January 12, 2010, 10:53:31 PM »
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You need elaborate on the problem as what exactly are you facing when you say no response does that mean that you hear initial beeps from the motor after connecting to the battery and then when you try to increase throttle there is no response from the motor or otherwise?

Also some times you need to program your ESC to make it work, look for a owners manual on the internet for your ESC and program it and see if it resolves the issue. Thats my 2 cents on it.

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« Reply #2 on: January 12, 2010, 11:11:17 PM »
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Thanx for your response hellflyer and also to point ate elaboration.

I have a 35MHZ reciever and a 20A ESC for 1400Kv motor. I am using a 7.4v 2s LI-po cell.
when the battery is connected there is no responce from the ESC such as beeps. Even when i connect my servo's with the reciever, with my radio off, there is no movement in the servo's(as it catches outer signals) so even if my radio is on, the reciever does not collect any signal. so waht should i do now.
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« Reply #3 on: January 13, 2010, 12:03:30 AM »
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Please specify the brands of your radio equipment (TX and RX).

Also, I have another suggestion/request of everyone. Please always use a meaningful topic name, like "no response from ESC when battery is connected", instead very generic ones like "help me" or "help needed" or "I have a problem". 
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« Reply #4 on: January 13, 2010, 12:09:50 AM »
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What's Tx and Rx?

And i will keep your suggestion in mind.
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« Reply #5 on: January 13, 2010, 12:14:29 AM »
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Tx = Transmitter, Rx = Receiver
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« Reply #6 on: January 13, 2010, 12:24:07 AM »
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i have a graupner Tx and GWS Rx.
thanx VC for the help.
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« Reply #7 on: January 13, 2010, 12:25:09 AM »
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The Tx is 3ch and the reciver is 6ch. they both have 35MHZ crystals.
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« Reply #8 on: January 13, 2010, 12:34:33 AM »
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You are welcome my friend! Unfortunately, my expertise ends here. Now I will wait for the REAL champions to take over and help you out.  Giggle

Hope your problems get sorted out soon. With someone like Anwar Sahab at the helm, we can solve ANY problems!

Cheers!

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« Reply #9 on: January 13, 2010, 06:55:39 AM »
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i have a graupner Tx and GWS Rx.

Sorry for not being more specific about my question.

1) Can you also quote the model numbers of both the TX and the RX.

2) Did you buy the TX and RX from one place, together ?  Are you sure the crystals match with each other ?

3) If you have a servo, and you connect to one of the first 4 channels in the receiver (except throttle, which should already be connected to ESC), does it respond to any stick movement ? (You should try moving both sticks in all orientations, and see if you can get movement on the servo). 

4) Connections that are reversed on the receiver end would exhibit similar behavior, like this : http://www.rcindia.org/electric-power/help-dead-power-set-up-on-mr-moss/ .

Please do not put a prop on the motor while you are experimenting !
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« Reply #10 on: January 13, 2010, 10:57:26 AM »
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my Tx graupner model is X-306 35MHZ FM
my Rx is JR Compatible GWS 6 Channel FM Receiver 35 MHZ

These two equipments were bought from two different places.  Grin
since my Rx and ESC are new i tested my Rx with only connecting the ESC with it and attaching the battery to the ESC(With my Tx switched on), see the circuit shown at the top. in my first try the ESC gave some beeps when the throttle was moved up but suddenly the setup stopped giving response and now when i connect the battery to the Rx also there is no response from the ESC(such as beeps).

all my stuff mentioned above is new except the battery (hope this helps)  Roll Eyes
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« Reply #11 on: January 13, 2010, 11:22:16 AM »
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i also have a lipo monitor and when i checked my battery after charging it completely the monitor showed all as 8.2 whereas my battery is 2s 800mah 7.4v lipo cell. please Help Me me.  Grin
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« Reply #12 on: January 13, 2010, 01:23:42 PM »
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First try the following....

Disconnect all servos from the Rx and also disconnect the motor from the ESC and isolate/insulate the ESC's motor connectors. Then connect the ESC to the Battery/power pin (not the throttle) and connect the ESC to the battery . Does it make a noise? If not reverse the plug in the Rx and see if it makes a noise or any light blinking on the Rx.

Report the findings.
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« Reply #13 on: January 13, 2010, 02:20:26 PM »
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i followed the steps that you wrote pankaj but there was no response (no beeps) from both my ESC (dys-20A, hobbywing-25A)  Bang Head Head Scratching

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« Reply #14 on: January 13, 2010, 02:23:36 PM »
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Can somebody tell me whether these Rx can be repaired from. (even the ESC's)   Roll Eyes
Just in case if anyone is dead.  Grin
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« Reply #15 on: January 13, 2010, 02:28:50 PM »
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First figure out if the ESC and/or Rx is dead. If you have access to a multimeter, check the output voltage of BEC (i.e. the connector that goes into the Rx). If it is giving <= 6V then the BEC is OK and the problem could by your Rx in which case you need access to another Rx.
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« Reply #16 on: January 13, 2010, 02:32:42 PM »
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I don't have one but i will try to get it.  Roll Eyes
Sai do you have one?  Grin
Thanx for the help pankaj.  Clap Thumbs Up
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« Reply #17 on: January 13, 2010, 02:35:28 PM »
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When i connect my ESC to the battery pack it give's out shocks and when i reverse it the wire starts burning the deans connecter.  Embarrassed Undecided
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« Reply #18 on: January 13, 2010, 02:37:35 PM »
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JR radios have a sync signal that is opposite in polarity to Futaba. Very likely that the Graupner Tx is a badged Futaba. This would explain the incompatibilty.

Also check if:
1. The frequencies of the xtals match
2. That they are both of the dual or single "conversion" type. A single conversion xtal will not work with a dual conversion set up, and vice versa.
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« Reply #19 on: January 13, 2010, 02:39:38 PM »
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So how do we check a single and dual conversion setup.  Head Scratching
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« Reply #20 on: January 13, 2010, 02:39:48 PM »
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Quote
When i connect my ESC to the battery pack it give's out shocks and when i reverse it the wire starts burning the deans connecter.

Do you mean reversing the battery leads to the ESC? If so, you are in BIG trouble and have most likely fried your ESC ! Cry
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« Reply #21 on: January 13, 2010, 02:40:54 PM »
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Quote
So how do we check a single and dual conversion setup.

Examine the xtals. They are marked.
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« Reply #22 on: January 13, 2010, 02:43:20 PM »
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And what is that mark.  Roll Eyes
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« Reply #23 on: January 13, 2010, 02:58:32 PM »
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When i connect my ESC to the battery pack it give's out shocks and when i reverse it the wire starts burning the deans connecter.  Embarrassed Undecided
This is strange. I did not know a 7.4V battery could give shocks. I have seen some sparking when I connect the battery to the ESC, but that's OK. However, do not EVER reverse the connection between the ESC and the battery.

Pankaj
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« Reply #24 on: January 13, 2010, 03:04:28 PM »
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Quote
And what is that mark

Very clearly specified on the xtal: "single conversion" etc.
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« Reply #25 on: January 13, 2010, 03:06:00 PM »
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Through shocks i meant sparks(sry couldn't find the crrct word) Grin
So, now what do you suggest me. please give me suggestions that are less costly(cause i hav already put in a lot of money in the electronics.)
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« Reply #26 on: January 13, 2010, 03:12:40 PM »
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I don;t know if there are cheap solutions available if you have fried your electronics. Any way, if you have manual to your Rx, then see what is the process of initial binding to the Tx. Remove the ESC, get hold of 3 pencil batteries and connect them in series to get 4.5V and then see if you can connect to your Rx and try and see if there is a response from the Rx.

Pankaj
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« Reply #27 on: January 13, 2010, 03:27:24 PM »
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i tried this but still there is no response from both my receivers. whenever i connect a servo to my Rx and then connect the battery there is a slight movement(only for a fraction of second). then when i take the battery out there is again a movement but in between it does not receive any type of signal.
 Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry Cry
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« Reply #28 on: January 13, 2010, 03:31:23 PM »
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Slight Movement? Can you elaborate? If it is the servos that you are talking about, then yes, that means that the servos are getting voltage. First try to bind the Rx/Tx as per the manual supplied with a different power source to the Rx. Then first you switch on your Tx, and then connect your Rx, without the ESC (direct connection), see if the servos respond to the signal from Tx.
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« Reply #29 on: January 13, 2010, 04:15:58 PM »
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Quote
First try to bind the Rx/Tx as per the manual supplied with a different power source to the Rx.

He says it is a 35 MHz set. The question of "binding" does not arise.
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« Reply #30 on: January 13, 2010, 04:53:54 PM »
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Hi ,
I think your issue is  as  follows :

Your issue is your Radio , I dont know if Graupner is Positive  or negative shift , but from my experience Saju uses a Graupner  Radio with a Turborix receiver  which works very well with a Futaba , hence  assuming then that  Graupner is the same shift system as Futaba then the GWS JR Type might not work with this Tx  so the best would be to try the  receiver from the futaba type  and see if it works .

Or the other option is to buy  a carona synthezised  which works well with  any type of shift.

And If you have reversed the + and negative between the  battery and ESC you have either spoiled the ESC or the battery by now.


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« Reply #31 on: January 13, 2010, 05:08:31 PM »
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Quote
And If you have reversed the + and negative between the  battery and ESC you have either spoiled the ESC or the battery by now.

As I had said earlier, the ESC would be fried for certain. But it's entirely possible - and even likely - that BOTH are lost for good.

BTW how does one "reverse" connection on a Deans?  :headscratch:Presumably desoldered and re-connected? Rather ambitious for a total newbie!
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« Reply #32 on: January 13, 2010, 05:22:31 PM »
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Your issue is your Radio , I dont know if Graupner is Positive  or negative shift , but from my experience Saju uses a Graupner  Radio with a Turborix receiver  which works very well with a Futaba , hence  assuming then that  Graupner is the same shift system as Futaba then the GWS JR Type might not work with this Tx  so the best would be to try the  receiver from the futaba type  and see if it works .

True... this has the symptoms of a TX not talking to the RX.  However, in the few sites where the X-306 TX is listed, it is listed as Graupner/JR, so it is more likely a JR standard TX. Since the GWS receiver is also confirmed to the JR compatible, it would be prudent to confirm that the channels also match between the TX and RX. Turborix has receivers that are shift agnostic, just like Corona.

So do the 3 fraction digits in 35.xxx on the crystals on both match with each other ?
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« Reply #33 on: January 13, 2010, 05:48:16 PM »
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Why not seek the nearest R/C flyer and have an eyeball with them. Carry your stuff and see if they allow you to mix match your Batt/ESC/Motor with theirs and zero down the issue.

Even I had a nightmare at 3 AM when I connected ESC/Motor/Batt together for the first time in my life as the motor(actually ESC)  kept on beeping.  The problem was I connected the ESC to wrong channel on Receiver (Futaba 6004 micro).

All the best !
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« Reply #34 on: January 13, 2010, 07:18:49 PM »
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True... this has the symptoms of a TX not talking to the RX. 

True Anwar , the other possible issue could be unmatched crystal pair like one single and the other  dual conversion .

Surely a Tx rx   communication problem  nothing else . Head Scratching Head Scratching
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« Reply #35 on: January 13, 2010, 08:27:46 PM »
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A "Servo Tester" comes really handy at these times, and while constructing a scratch build plane. I am making it DIY (more trouble than just getting a ready made, but thats lots of fun!!)
 
http://www.elektor-electronics.co.uk/magazines/2006/july/rc-servo-tester-exerciser.58302.lynkx

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« Reply #36 on: January 14, 2010, 11:06:53 AM »
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Quote
Your issue is your Radio , I dont know if Graupner is Positive  or negative shift , but from my experience Saju uses a Graupner  Radio with a Turborix receiver  which works very well with a Futaba , hence  assuming then that  Graupner is the same shift system as Futaba then the GWS JR Type might not work with this Tx  so the best would be to try the  receiver from the futaba type  and see if it works .

Quote
True Anwar , the other possible issue could be unmatched crystal pair like one single and the other  dual conversion

Not to be misunderstood in any way but both these were covered in my post:


Quote
JR radios have a sync signal that is opposite in polarity to Futaba. Very likely that the Graupner Tx is a badged Futaba. This would explain the incompatibilty.

Also check if:
1. The frequencies of the xtals match
2. That they are both of the dual or single "conversion" type. A single conversion xtal will not work with a dual conversion set up, and vice versa.

Possibly one is not really following the thread in continuity.
« Last Edit: January 14, 2010, 02:36:33 PM by anwar » Logged

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« Reply #37 on: January 14, 2010, 12:51:41 PM »
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thanx all for your replies. now i am looking forward to buy a new receiver (as recommended) of futaba but don't know where to buy a 35MHZ futaba reciever from.
Can anyone help me?

rgrds,
SUMIT
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« Reply #38 on: January 14, 2010, 01:31:50 PM »
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Sumit ,
The best is to buy a synthesized  receiver  as it will work with any type of radio.
Rgds
Sai
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« Reply #39 on: January 14, 2010, 02:41:06 PM »
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now i am looking forward to buy a new receiver (as recommended) of futaba

If you read the thread carefully, you will realize that your transmitter is deemed more of the JR standard, so buying a Futaba receiver will not help.  As Sai suggested, please get a synthesized shift-agnostic receiver like Corona as it handles this ambiguity, and that saves you the trouble of hunting down the right crystal also.

Also, when you seek help on such issues, please try to respond to specific questions raised.  For example, it was asked multiple times whether your channel (the "xxx" in 35.xxx) of the crystals in both the TX and RX match, but it went unanswered.  This makes such "remote" troubleshooting even more hard Sad 

Answering the pointed questions really helps clarify the situation  Thumbs Up
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« Reply #40 on: January 14, 2010, 02:54:38 PM »
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Quote
but from my experience Saju uses a Graupner  Radio with a Turborix receiver  which works very well with a Futaba , hence  assuming then that  Graupner is the same shift system as Futaba

Anwar, this indicates Futaba compatibility and not JR. Anyway, a shift agnostic Rx, as suggested, is the best option.
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« Reply #41 on: January 14, 2010, 02:59:43 PM »
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Please see my response below, which I am quoting from my earlier post. Actually this looks like it is JR, and you can pretty much confirm that from Google searches.

However, in the few sites where the X-306 TX is listed, it is listed as Graupner/JR, so it is more likely a JR standard TX. Since the GWS receiver is also confirmed to the JR compatible, it would be prudent to confirm that the channels also match between the TX and RX. Turborix has receivers that are shift agnostic, just like Corona.
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« Reply #42 on: January 14, 2010, 05:28:02 PM »
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Anwar

Point taken. I just went by Sai's reference.
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« Reply #43 on: January 14, 2010, 10:17:59 PM »
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If you read the thread carefully, you will realize that your transmitter is deemed more of the JR standard, so buying a Futaba receiver will not help.  As Sai suggested, please get a synthesized shift-agnostic receiver like Corona as it handles this ambiguity, and that saves you the trouble of hunting down the right crystal also.

So as you said anwar that i should use corona, u only suggest me the place from where to buy it.  Grin
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« Reply #44 on: January 14, 2010, 11:17:27 PM »
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That puts me in the difficult position of visiting the website of every LHS that has a website  Wink 

I have a feeling you already know the usual suspects !

BTW, I still do not see if you have established that your receiver is the problem, or just a crystal issue.  Hunting down a crystal can also get just as adventurous, so I guess there is no harm in getting an "extra" receiver !

Is there no way you can visit a neighboring flyer who can verify the setup for you ?
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« Reply #45 on: January 15, 2010, 08:32:03 AM »
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Quote
thanx all for your replies. now i am looking forward to buy a new receiver (as recommended) of futaba but don't know where to buy a 35MHZ futaba reciever from.
Can anyone help me?

rgrds,
SUMIT

the only place i know is rotor.co.in, they deal in all odd/All frequencies (which is a good thing)! i also remember seeing some guy from Indiarc/Rcindia posting a sale Ad. on 35Mhz stuff !

PS: http://rotor.co.in/product-find-action.asp?pdt_name=35mhz&code=&x=0&y=0

sahil
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« Reply #46 on: January 15, 2010, 08:37:59 AM »
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I thought RCForAll and IndianHobbies also had them (did not verify). I mean the Corona ones.
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« Reply #47 on: January 15, 2010, 08:42:35 AM »
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well for one i was referring to the choice of receiver brands available at rotor and yes i think sai also stocks 35mhz stuff but i don't know about Indian-hobbies all i haven seen lately are 2.4Ghz stuff !
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« Reply #48 on: January 15, 2010, 10:01:21 AM »
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Sumit,
If I were you, I would go by Ujjwaana's suggestion of trying to find a more experienced (than yourself) flyer in or near your area and then take all your stuff to work out how things are supposed to work. You have spent, by your own admission, quite a sum already and have not got the connection proper. So are you willing to keep on experimenting more at your expense or would prefer to seek guidance? Bythe look of it, you may have fried more than one item, so just be careful from now on.

Regards
Pankaj
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« Reply #49 on: January 16, 2010, 07:41:17 PM »
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yeah thanx for reminding. I will be visiting shrikant may be he will help me out Grin
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« Reply #50 on: January 16, 2010, 07:50:55 PM »
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Hey i was just thinking if a receiver can be repaired? if yes then who will repair and some links for the same.
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