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03-01-2010, 02:55 PM
| #1 |
| I wanna be Dave Join Date: Mar 2008 Location: In the Dark Edges of your Mind
Posts: 6,386
|  BEC Troubleshoot
I have a Tekin FXR, JR 9100 servo, Spectrum reciever, and I run a 3 cell lipo. I still choose to use the power switch for the ESC as well. Issue: My servo is powered straight from the BEC... at least its wired that way. For the last 4 months, plugging in the battery does not power the servo. It only gets power when the ESC is on. Only the signal wire from the servo goes to the receiver though. :? If the Tekin is powering the servo (and I don't see how) I should have problems running a 3 cell. I have never had any. If the BEC is powering the servo (like it is wired to do) why is it only getting power when the ESC is on. I was wiggling wires today and I can get the servo to run on BEC only and on the ESC only by holding the wires just right. So its a wiring issue I know. But how has it been working like that for the last 4 months?? |
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03-01-2010, 03:18 PM
| #2 |
| I wanna be Dave Join Date: Jan 2005 Location: Hueytown, Alabama
Posts: 6,777
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The servo should get power, but no signal to tell it what to do.........
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03-01-2010, 04:22 PM
| #3 |
| Pebble Pounder Join Date: Dec 2009 Location: Who Dat Louisiana
Posts: 115
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So, what is your problem? The servo is getting power straight from the bec, but it's not gona move until the rx gives it a signal to do so. So is this your problem, or you thought you had one?
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03-01-2010, 08:22 PM
| #4 |
| I wanna be Dave Join Date: Mar 2008 Location: In the Dark Edges of your Mind
Posts: 6,386
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No... the problem is that the servo has NO power with the BEC wired straight to it but it has power when the ESC is on. Correct me if I'm wrong but the black/brown wire and the red wires are power and the orange wire is signal. I wired the BEC power wires straight to the servo power wires and got no power... with 2 different BECs. Here is how I have it working for now... BEC minus signal wire plugged into Batt. port on RX Servo plugged into steering port on RX ESC minus red wire plugged into Throttle port on RX Punk switch in Aux Port Hooked up like this, the servo is powered as soon as I connect the battery... but so is the punk dig :? It works fine, but I don't like putting BEC voltage through the RX. I can't figure out what I'm doing wrong. |
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03-01-2010, 08:54 PM
| #5 | |
| I wanna be Dave Join Date: Jan 2005 Location: Hueytown, Alabama
Posts: 6,777
| Quote:
You are confusing me on this........ If you want to run your servo directly off the BEC, the best way (IMO) is to run the input power wires directly to the connection that your battery is hooked up to. Then run the BEC output wires directly to your servo positive and negative using a cut up Y-harness or solder them. Then run the signal wire from your servo to the receiver using a male plug as usual. | |
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03-01-2010, 09:45 PM
| #6 |
| I wanna be Dave Join Date: Mar 2008 Location: In the Dark Edges of your Mind
Posts: 6,386
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It sounds wack... but that is exactly what I am doing. I just tried again. Input to the BEC is straight off the battery. Output from the BEC pos and neg goes into a Y and the other side of the Y has the pos and neg from the servo. Then the loose end of the Y with a signal wire ONLY goes to the RX. I think I just figured it out. You guys remove your ESC power switch so your ESC turns on as soon as you connect the battery. That gives the RX power and the servo. When my switch is off the ESC is not powering the RX so the Servo does not fire up. Does that sound right? I was thinking the Servo should be powered whether the RX had power or not since its coming off the battery.:? Again... does that sound right? |
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03-01-2010, 09:50 PM
| #7 | ||
| I wanna be Dave Join Date: Jan 2005 Location: Hueytown, Alabama
Posts: 6,777
| Quote:
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03-01-2010, 09:50 PM
| #8 | |
| I wanna be Dave Join Date: Jan 2008 Location: Arat Alabama
Posts: 2,678
| Quote:
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03-01-2010, 10:31 PM
| #9 |
| I wanna be Dave Join Date: Mar 2008 Location: In the Dark Edges of your Mind
Posts: 6,386
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Thanks guys. That was a case of tearing it apart to fix something that wasn't messed up after all.  Oh well... at least I cleaned up my wiring a little in the process.... ok... a lot. |
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Linear Mode
