Replies to This Discussion

3D RoboticsPermalink Reply by Chris Anderson on March 1, 2009 at 5:30pm

We don't see that problem. Can you tell me how you're powering the board? Via the ESC or a separate power source? And are you sure you've got all the connectors in the right way?

The only explanation I can think of is a poor solder joint at either the input or output pins on the throttle channel. There's really nothing else that can wrong in that circuit (it's not affected by code)

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Permalink Reply by copperclad on March 2, 2009 at 5:12am

hi Bryan
it sounds like your ESC is not initializing , try plugging one of the servos into the throttle channel to see if you have a servo signal and how it behaves , like Chris says check your solder joints , i have found it is easy to get a cold joint , HTH

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Permalink Reply by Bryan Cuervo on March 2, 2009 at 5:42am

Thanks Guys,
When I get home tonight I'll check the solder joints and do the "servo test" per copperclad.
I'm powering the board via ESC and I've double/triple checked connections
Bryan

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Permalink Reply by Bryan Cuervo on March 3, 2009 at 2:38pm

Looks like I diagnosed the problem to the Jeti Advance 40 ESC. A Jeti Eco ESC and a Castle creations ESC work fine. I've posted findings in the "other hardware" forum to inform others of this issue.

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Permalink Reply by copperclad on March 4, 2009 at 4:04am

Hi Brian
i downloaded the jedi advance manual , and see it should arm if it is powered up with the throttle stick set to low , this is pretty standard for most ESC's i am familiar with

i am wondering if you have tried setting the ATV ( or travel adjustment ) in your TX to a lower setting

.

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Permalink Reply by Bryan Cuervo on March 4, 2009 at 5:29am

Good idea copperclad. I'll try that before I go through the trouble of ripping out the old system.
I just don't understand what Ardupilot is doing to keep it from working (with Ardupilot out of the loop, the ESC works flawless)

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Permalink Reply by Bryan Cuervo on March 4, 2009 at 2:17pm

I tried the Jeti Advance 40 ESC again with the throttle stick set to low (trim full down and also tried increasing lower endpoint). Nothing worked with this setup

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3D RoboticsPermalink Reply by Chris Anderson on March 4, 2009 at 2:24pm

The MUX in manual mode is a straight pass-through, just like a wire. Perhaps the ESC is sensitive to the length of the cables (some gear requires a signal amplifier for longer than 30cm or so), and when you connect ArduPilot you're simply stringing out too much wire? I don't know, but I doubt this has anything to do with the ArduPilot board.

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Permalink Reply by Bryan Cuervo on March 5, 2009 at 6:11am

I agree Chris. Since two other ESCs work fine with the Ardupilot, I think it is just a compatibility issue with the Jeti Advance 40.

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Permalink Reply by Amoisonic on March 5, 2009 at 6:18am

I am having the similar problem (replaced ESC by a servo and confirmed Ardupilot not controlling the throttle).Sometimes when flip CH5 back to manual control,throttle not functioning not until lower the stick to minimum and go back to to half.Monitoring on Arduboard 6pin output and found the following message:Mot: 114 Yaw: 66 Alt: 65531 Crs: 353 Dis: 2 Des: 180,the Altitude sometimes has a funny reading.

Thanks
Amoisonic

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3D RoboticsPermalink Reply by Chris Anderson on March 5, 2009 at 8:27am

Amoisonic: Are you saying that in manual mode, that channel is sometimes not working, even with a servo? That's really weird--I'd check your solder connections.

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Permalink Reply by Amoisonic on March 5, 2009 at 12:17pm

Sometimes when revert from Auto to Manual mode,the throttle will not be functioning not until lowering the stick all the way down then up again.

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