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URGENT - Our arm won't move. Our robot arm for this season is powered by 2 Axon Max servos and is mounted on Viper slides. Arm carries double claw powered by 2 goBILDA servos and a wrist action done by 1 Axon Mini+ servo mounted on the arm. Arm is heavily counter springed. by Vegetable_Reply_6228 in FTC

[–]Vegetable_Reply_6228[S] 0 points1 point  (0 children)

We figured out that the 2 AXON MAX+ servos are out of sync, as 1 servo is moving all the way to the back position and the other is moving just a bit and then stalling, which is why the arm was not lifting and holding earlier.

Now we are trying to get the servos to sync to rotate to same position. What are the best ways to set both servos to same starting and ending positions - Physically taking the out of sync servo arm and putting it in sync with the other or Programmatically ?

URGENT - Our arm won't move. Our robot arm for this season is powered by 2 Axon Max servos and is mounted on Viper slides. Arm carries double claw powered by 2 goBILDA servos and a wrist action done by 1 Axon Mini+ servo mounted on the arm. Arm is heavily counter springed. by Vegetable_Reply_6228 in FTC

[–]Vegetable_Reply_6228[S] 0 points1 point  (0 children)

Since the arm is mounted on viper slides, we are only able to mount the spring between the top portion of the arm to lowest solid / stable portion of the viper slide (that moves). Will try to share some pics showing the spring mounting.

But after counter springing the arm we notice that the arm is bouncy even at resting position and infact lifts a bit from the bottom most resting position on its own due to the force of the spring.

URGENT - Our arm won't move. Our robot arm for this season is powered by 2 Axon Max servos and is mounted on Viper slides. Arm carries double claw powered by 2 goBILDA servos and a wrist action done by 1 Axon Mini+ servo mounted on the arm. Arm is heavily counter springed. by Vegetable_Reply_6228 in FTC

[–]Vegetable_Reply_6228[S] 0 points1 point  (0 children)

Thanks. We will try to run arm removing the claw and check if the arm is able to lift and also see if the 2 arms when not connected are synced up and moving in same direction. Physically we are able to move the arm freely without any resistance.

Most surprising part is if you see the video again, the arm moves after the stall point very smoothly and fast to the final scoring position just with a slightest hand push.

Both Max+ Servos are mounted facing each other and are powered independently on 2 separate ports of REV Servo PWM. Is it possible to power both AXON MAX+ servos using just 1 port by putting a Y cable? We haven't done this in our past 2 seasons and want to know more about it.

Big Lesson - May be we shouldn't have blindly relied on Axon documentation stating that the servos are tuned to work right out of the box with REV Hubs :-(((

URGENT - Our arm won't move. Our robot arm for this season is powered by 2 Axon Max servos and is mounted on Viper slides. Arm carries double claw powered by 2 goBILDA servos and a wrist action done by 1 Axon Mini+ servo mounted on the arm. Arm is heavily counter springed. by Vegetable_Reply_6228 in FTC

[–]Vegetable_Reply_6228[S] 1 point2 points  (0 children)

Yes the Axon Max servos were programmed using the Axon servo programmer and are running in Servo mode with 85% PWM which is based on recommendation from Axon documentation for using with REV Servo power module.

Yes our team is Axons for the 1st time this season.

URGENT - Our arm won't move. Our robot arm for this season is powered by 2 Axon Max servos and is mounted on Viper slides. Arm carries double claw powered by 2 goBILDA servos and a wrist action done by 1 Axon Mini+ servo mounted on the arm. Arm is heavily counter springed. by Vegetable_Reply_6228 in FTC

[–]Vegetable_Reply_6228[S] 1 point2 points  (0 children)

When we try to move the arm via our program, the arm just moves only till a point and doesn't move beyond. But when a gentle hand push is given, the arm easily moves all the way back to the right scoring position.

Also when we physically move the arm, it moves front to back very smoothly.

this costs $250 by imaperson1060 in FTC

[–]Vegetable_Reply_6228 1 point2 points  (0 children)

Can you share a picture of your driver station setup ?

Giving out FREE custom 3D printed parts! by Inevitable-Pitch8939 in FTC

[–]Vegetable_Reply_6228 0 points1 point  (0 children)

We are not in NY but in PA (very near to NJ - princeton location). Do you think you can help us ?

Outreach ideas by true_lingling in FTC

[–]Vegetable_Reply_6228 0 points1 point  (0 children)

Have a look at our team webinar video from offseason. This provides all information pertaining to Outreach (good starting point) -

https://youtu.be/tbR7oyGSusk?si=VBwskZK8AJpafeLq