is that a piston mounted on a lead screw driven track?
What are your concerns with air usage? My memories from using pneumatics in 2003 where we used those sized ones remind me that once we ran 2 of them our air tanks were nearly empty. Have you addressed that issue?
Yes. It is an interest design by the mentors and students.
I’ll try to get a close-up pic of it to share with everyone.
I like the design, we have the same idea sort of for the arm, it will rock!