Problem with my throttle setting

[John Doecliff]

Bought a used turbo ace X-830 with a Naza M V-2 Controller. Inspected everything, preformed bind, calibrated compass, programmed Spectrum DX-8. Everything seems to work just fine except the throttle control. I tethered it to a brick and did some testing with it. After enabling the motors you have to go above 50% stick position to get the motors to energize and going below 50% stick position causes them to cut out. When they are at 50% stick position they are at a very high rate of speed. If I really work the throttle gently I can get them down slightly below 50% without cutting out. I'm trying to figure out if this is a radio programming problem or an ESC programming issue.

On the DX-8 my throttle curve is linear from 0% to 100% throughout the travel of the stick. On the servo set up the throttle travel is 100% and 120% I set it this way because that was what was giving me full travel when hooked up to the DJI GUI for the Naza V-2. When tethered all other stick commands appear normal. It's just that the motors cut out at such a high throttle position. I want my throttle to have full range not 50% to 100%. Any suggestions would be appreciated.

 

[Mike]

Have you flown another model with the same tx? It may be worthwhile to set up a new model in your tx and play with the curves to see if you can correct the way throttle is applied. Before that, definitely re-calibrate the ESCs though just to ensure that isn't the issue first. That's all I can think of quickly off the top of my head. If I can come up with something else, I'll post again.

When I had a Turnigy 9x tx, I had similar symptoms at one point, but it had to do with the actual sticks/gimbals not making good contact, so throttle signal actually wasn't being sent (based on the output on the tx showing throttle position). I doubt you have that with a DX8 since the quality is much better and also you probably would have figured that out pretty quickly anyway.

If you figure it out, let us know what it was.

 

[John Doecliff]

Yes My DJI 450 runs from the same transmitter. I think this quad was a RTF package with a different radio so I am going to calibrate the ESC's . I will let you know how it turns out.

 

[Mike]

That sounds like a good plan. Hopefully that solves the problem.

 

[John Doecliff]

Ok I finally got some time off work to test fly the turbo ace X-830. I calibrated the ESC'c and an email exchange with wow hobbies claimed that it was just the nature of the naza v-2 to require that much throttle input to run the motors. When I had it tethered to the ground it seemed like the minimum throttle would be too much and the quad would rise rather than hover. I am happy to report that it flew just fine and hovered well. My fears were unfounded. I was really worried because this was a used quad and I could have gotten screwed. The components alone were worth more that I paid for the whole thing but I was still concerned. I got a naza m lite and v-2 both with gps and 2-8 channel receivers with dual antennas for my radio plus 2 quads and 2 gimbals and a bunch of spare parts. Now I will reinstall the gimbal and figure out a better way to secure the battery. The landing gear on this quad is a pathetic joke, it's very weak. Still, all and all this is a good next step in the learning process. Thinking about a tarot hexa quad for my next build.