Posted by Mamoon Syed on January 5, 2013 at 7:17pm
Hey guys, I am just getting started at Arducopter, and I bought an Arducopter Rev C from 3DRobotics, but I am having technical difficulties to say the least. I am almost certain there are no soldering errors, and my receiver inputs are in order, but what I found to be happening is that:1. After arming the ESC's the A light goes solid with the C light blinking (never had the B light blink except for calibrating the ESC's), but the throttle still passes through.2. After raising the throttle slowly, the Arducopter goes about a foot in the air until me completely losing control and then having the Arducopter crash in an unsightly heap on the ground.Now I am positive that the props are going in the right direction and I have calibrated my radio and sensors both.Any ideas?
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I think in both these cases you should do another test or two but motor logging enabled.
Post the logs.
Definitely worth a look. The logs solved my issue.
Randy
Yes, testing with the elastic cords could make it have an exaggerated response. However notice the erratic movements start immediately at throttle up. I have the same problem with mine. On hand test I cut my self trying to hold it because at throttle up it immediately started to move EXTREMELY erratic. If left alone it wont even get off the ground before doing a flip and never in the same direction. I have ran out of ideas of what to do.
What do you mean crashes? Does it flip?
In CLI, does it say "quad" for frame?
Perhaps enable motor logging in CLI, clear the logs before your next test.
The logs may help. You can post the logs.
Randy
Yes most likely it's either wrong frame type or + / x issue. Easiest way to test it is by holding it hand from center and then start engines slowly to see how they respond. Naturally beware of propellers. Give enough throttle that you can feel small lift from it and then try all control channels like AIL, ELE, RUD you should feel that copter is going correct way, if for example AIL stick to right will make copter to lean left, your AIL channel is reversed.
If you feel that copter starts to wobble, shut engines immediately and check frame type, frame orientation. It should not wobble at all.
I have the same 3DR quad.
Verify you have the correct frame in CLI.
I had mine set to hexa which caused my problem. Set it to quad and I was in the air.
Randy
As I answered when you asked the same question in the wiki:
1) It means you don't have GPS lock yet.
2) If your copter is flipping, it means you've got it set up wrong. Check that you've got the + vs X set right for your config, and double-check motor direction and prop (pusher/puller) with the CLI Setup/Motors command. Also make sure the APM is facing the right direction.
Replies
Post the logs.
Definitely worth a look. The logs solved my issue.
Randy
Yes, testing with the elastic cords could make it have an exaggerated response. However notice the erratic movements start immediately at throttle up. I have the same problem with mine. On hand test I cut my self trying to hold it because at throttle up it immediately started to move EXTREMELY erratic. If left alone it wont even get off the ground before doing a flip and never in the same direction. I have ran out of ideas of what to do.
In CLI, does it say "quad" for frame?
Perhaps enable motor logging in CLI, clear the logs before your next test.
The logs may help. You can post the logs.
Randy
Yes most likely it's either wrong frame type or + / x issue. Easiest way to test it is by holding it hand from center and then start engines slowly to see how they respond. Naturally beware of propellers. Give enough throttle that you can feel small lift from it and then try all control channels like AIL, ELE, RUD you should feel that copter is going correct way, if for example AIL stick to right will make copter to lean left, your AIL channel is reversed.
If you feel that copter starts to wobble, shut engines immediately and check frame type, frame orientation. It should not wobble at all.
Verify you have the correct frame in CLI.
I had mine set to hexa which caused my problem. Set it to quad and I was in the air.
Randy
As I answered when you asked the same question in the wiki:
1) It means you don't have GPS lock yet.
2) If your copter is flipping, it means you've got it set up wrong. Check that you've got the + vs X set right for your config, and double-check motor direction and prop (pusher/puller) with the CLI Setup/Motors command. Also make sure the APM is facing the right direction.
Please go through the Troubleshooting Guide.