Given this configuration:
We are trying to figure out if we need to cover the open sides of the arm frame. We know that we need to cover the sprockets, chain path, and gears but are unsure about the sides.
Advice?
i think you might need to watch rule R05 about entanglement
“If the structure of a COMPONENT permits easy penetration by an object less than 4”2 in cross section, it will invite detailed inspection.
Nets, loose rope or wire, voluminous sheets of fabric, etc. may be carefully inspected for these hazards. A ⅛” x ⅛” tight-mesh net (or very loose mesh fabric, depending on your point of view) may be a reasonable material that would not automatically pose an entanglement hazard. However, any flexible material has the potential to become an entanglement hazard if it is not firmly attached to an appropriate structure or left in a loose, voluminous configuration. Therefore, you must use your best judgment to determine if your particular use of the material will pose an entanglement hazard. Actual performance on the playing field will determine if the potential for entanglement is significant or not.”
i know this sounds like it only applies to mesh, nettings, ect., but dont think of the rule necessarily but instead the safety/robot performance implications. A robot with a claw might be able to wedge itself into the framework for your arm, damaging the arm structure along with any wires that you are running up. to avoid this completely, you might want to put some plexiglass side covers on there or perhaps drill some holes in the arm supports and string up some fabric walls.
If an opposing ROBOT sticks it’s claw inside the FRAME PERIMETER of your ROBOT, they get a PENALTY and possible YELLOW CARD under <G48-B>. That’s not much consolation to you if that incursion ripped out all the wires and pneumatics from the guts of your ROBOT.
You might want to have some lightweight covering that attaches to the frame to keep your vital parts intact.
First off… that’s a beautiful machine. I suspect you’re asking the question from a safety perspective first, and… were I inspecting the machine, I’d have no problem passing it as it stands without additional coverings on the arm frame. I do not speak for other inspectors, however… they may see a hazard I have missed.
I do, however, see a wonderful opportunity to put some lightweight coroplast, plywood, thin polycarbonate, or “twinwall” type corrugated polycarbonate over the gap and use it as a place to prominently display the name of your team and your sponsors. (We will be looking for that, remember! Rule R13) A thin sheet of aluminum could do the trick, too, and you do seem to have access to some nice machining facilities.
If you’ve got a wee bit left in your weight limit, I see those sides as the perfect place to add the “bling” that turns this robot from looking good to looking GREAT!
Jason
Nicely built robot. I will be one of the ‘lucky’ inspectors that will get to see this at Lone Star.
Just make sure that any and all pinch points are covered. I agree with Jason. This could give your team a great opportunity, and really cool way to advertise your sponsors names.
Big Al, am I missing anything?
Good luck and I’ll see you in Houston.
Paul
Already going there…we have plenty of room (sitting at 107 without bumpers or battery) and so are adding polycarb/Lexan to put flashy things like sponsor stickers etc …and yes safety of all is my first concern (especially the inspectors 
)
Pinch point coverings are in the works, trying to figure out the best way to cover the sprocket at the shoulder. Was more concerned about the openings in the arm frame itself.
Thanks for the input guys it helps alot!
P.S. Pjohn1959, as a side note thank you in advance for putting up with all the reinspection requests, questions, help and mentoring you do for all the teams at the regional!
I agree with Paul and Jason…