Motopreserve
Drone Enthusiast
Hey folks. Please excuse the long-winded post. Trying to be as clear as possible.
I've been toiling away with a used 2-axis gimbal I picked up for practicing with a Nex5n. Most of the controllers I've used until now have been proprietary (zenmuse and tarot for gopro).
This new gimbal make is unknown to me, but I know the controller is an 'authentic' Martinez V3 (Ready to Fly Quads version) based on ID markings on the board. It is loaded with the latest firmware (V50 r217).
I have spent some time balancing the camera/gimbal based on videos and how-to's, and as far as I can tell it's pretty good. I can move it to any position and have it stay. I think I have the wires routed well (zip ties to avoid them pulling/influencing motors - but leaving enough length for articulation). The motor directions have been checked and appear correct. The IMU is mounted in the correct, standard position - parallel to the camera/plate.
my biggest problem has been a good method of basic tuning. From what I've read, it's best to start with PWM at zero and PIDs all at 5 (both pitch and roll), then starting with Roll only: slowly raise PWM until "vibration." Then back off until it stops. Then begin to raise P until vibes, raise D to calm it, back and forth until P is as high as it can get. I is still a mystery to me and makes the gimbal shake horribly any time I raise it.
Couple issues/questions:
1. there is no clarification to what "vibrations" means. I get very low oscillation (bouncing really) when I raise PWM. Is this different than vibration? I was expecting high freq vibes. I have experienced high freq vibes when the D gets too high. So I know there is a difference. Is one caused by specific issues???
2. Is is there a better method to do the basic tuning? I've read one alt method to set everything to zero and pick a PWM at random. This doesn't make sense to me.
3. One issue may be that the IMU is mounted on plate under camera so that the servo connector will hit rear motor if it articulates furthest forward. I won't want it tilting that far - but not sure if this is a factor. I may have to solder new header pins to the IMU for clearance.
Any guidance will be MUCH appreciated.
Thanks
Scott
I've been toiling away with a used 2-axis gimbal I picked up for practicing with a Nex5n. Most of the controllers I've used until now have been proprietary (zenmuse and tarot for gopro).
This new gimbal make is unknown to me, but I know the controller is an 'authentic' Martinez V3 (Ready to Fly Quads version) based on ID markings on the board. It is loaded with the latest firmware (V50 r217).
I have spent some time balancing the camera/gimbal based on videos and how-to's, and as far as I can tell it's pretty good. I can move it to any position and have it stay. I think I have the wires routed well (zip ties to avoid them pulling/influencing motors - but leaving enough length for articulation). The motor directions have been checked and appear correct. The IMU is mounted in the correct, standard position - parallel to the camera/plate.
my biggest problem has been a good method of basic tuning. From what I've read, it's best to start with PWM at zero and PIDs all at 5 (both pitch and roll), then starting with Roll only: slowly raise PWM until "vibration." Then back off until it stops. Then begin to raise P until vibes, raise D to calm it, back and forth until P is as high as it can get. I is still a mystery to me and makes the gimbal shake horribly any time I raise it.
Couple issues/questions:
1. there is no clarification to what "vibrations" means. I get very low oscillation (bouncing really) when I raise PWM. Is this different than vibration? I was expecting high freq vibes. I have experienced high freq vibes when the D gets too high. So I know there is a difference. Is one caused by specific issues???
2. Is is there a better method to do the basic tuning? I've read one alt method to set everything to zero and pick a PWM at random. This doesn't make sense to me.
3. One issue may be that the IMU is mounted on plate under camera so that the servo connector will hit rear motor if it articulates furthest forward. I won't want it tilting that far - but not sure if this is a factor. I may have to solder new header pins to the IMU for clearance.
Any guidance will be MUCH appreciated.
Thanks
Scott