Hello jfew,

In ARC I would recommend playing with the center value on the continuous rotation servo on the foot. Not all continuous rotation servos are calibrated the same so the center value (the non-moving position) is a bit different from servo to servo.

If you are using a Movement Panel and don't want to adjust your values (or can't) you should be able to use a small phillips screwdriver and adjust the potentiometer on the servo. There should be a small circular hole on one side of the servo that allows you to adjust the center position. I wouldn't recommend this as your first option but I figured I'd let you know that the option (should be) is there for you.

The other servo twitch might be due to the weight of the Arm or just the position that it's in, try changing the position of the arm and see what happens. If it's still quivering try to mount the arm a little differently (change the angle) or try to shed some weight off of the arm. It also could be a low battery issue but it doesn't seem likely as the other servos seem to be operating ok.

@Jfew , Welcome to the community

Skater is right , first make sure your batteries are fresh , second remount about 5 degrees off what it's mounted now to ensure it's not sitting in the deadband. I imagine the arm doesn't weight much but there's always the high torque servo option too.

the arms appear to be working correctly for the most part. current problem is when the object avoidance mode the robot spins in a circle and on the user interface shows that it is moving forward, or turning left. the wheel servos are connected to D2 & D3 and the arms are on D5 & D6. In placing both wheel servos to them max (10) the robot only goes forward and the UI shows turning and backing. I reset the center on the arms and that appears to have solved the issue with the fist pump (I thought is cool for it to to do it without programming).

Ok I think I may know what's happening, the two feet servos are oriented in opposite directions so you will have to send a value of 10 to one and 90 to the other in order for the robot to go straight, and then both the same value in order for it to turn. I hope that makes sense.

Might want to set the values to 100 and 1 instead of 90 and 10

made the suggested changed and uploaded the results

Are you wanting it to backup like that? Was this the intended result? It appears the robot is using the obstacle avoidance and is backing up and turning when the minimum set distance is sensed. You may want to reduce the min distance before it turns.

min distance is set to 30. the UI shows it is going forward the whole time it is running, turning when paused. It is running the obstacle avoidance function. what would you suggest I change the min distance to?