Gripper Problems

ArduCopter Copter 3.4
1

I have Pixhawk 2.4.8 with APM copter v3.4.6 and I am trying to use the gripper.

Docs say to set GRIP_ENABLE TO 1 to load the parameters to set it up.

There is no GRIP_ENABLE parameter.

I just want to set my copter up to maually or in auto mode activate a servo to
drop a payload. There are several versions of how to do this in the documentation
and none of them work.

So has anyone succeeded in making this work and how?

2

I have Pixhawk 2.4.8 with APM copter v3.4.6 and I am trying to use the
gripper.

Docs say to set GRIP_ENABLE TO 1 to load the parameters to set it up.

Please supply a URL to these docs.

There is no GRIP_ENABLE parameter.

There is for me!

It is new for 3.5.

I just want to set my copter up to maually or in auto mode activate a servo
to
drop a payload. There are several versions of how to do this in the
documentation
and none of them work.

We should really have one, good, working version, so if you can provide
URLs of those you’ve found, that would be great!

So has anyone succeeded in making this work and how?

Yes, it does work.

I suggest you update to 3.5.1 as a first step.

3

I see griipper is in 3.5, but it shows up in 3.4.6 without the other parameters.
Perhaps when I reinstalled 3.4.6 after having 3.5, It did not do a clean install of 3.5.

I tried version 3.5, but I could not get it work with my sonar, so I went back to 3.4.6 which does work.

I was finally able to use the camera shutter to drop a payload in 3.4.6. So now I have all the functionality I wanted with my sonar and payload dropping capability.

I hesitate in going to 3.5 since I couldn’t get my sonar to work in it.

I tried the DO_SET_SERVO again and it worked this time. Not sure why it
didn’t work before. However I tried to use channel 7 to manually activate the gripper
but could not get that to work.

Thanks for your response.

here are a few of the urls I was referring to earlier:
http://ardupilot.org/copter/docs/common-gripper-servo.html says to set GRIP_ENABLE to 1
which does not exist in the parameters of 3.4.6

http://ardupilot.org/copter/docs/common-mavlink-mission-command-messages-mav_cmd.html?highlight=do_set_servo#mav-cmd-do-set-servo

http://ardupilot.org/copter/docs/common-servo.html?highlight=do_set_servo

http://ardupilot.org/copter/docs/mission-command-list.html?highlight=gripper#do-gripper