Pneumatic questions, sorry!

**Max** · 7th August 2011, 10:32

here is a quick (and not to scale) drawing of my bot
[attachment=0:39r7ibiy]hole drum spinner robot wwith removable lid info.jpg[/attachment:39r7ibiy]
i can't think how i can explain it any further basicly i just want to be able to bolt my aluminium lid onto my 20mm hdpe bot without having to tap a hole for the bolt as i think the thread would strip easily (thats why i want a course thread, to help prevent it ripping out) or would wear out over time with all the bolting and unbolting to do repairs or charge batteries

**Danjr1** · 7th August 2011, 11:18

i use wood screws and they work fine

**maddox10** · 7th August 2011, 16:40

For that kind of application, there is a very usable idea.

Picture follows later, I'll have to make a demo version.

**maddox10** · 7th August 2011, 18:28

Something I cooked up.

A piece of 20mm thick 40*50 HDPE, a 20mm hole in the approximate middle.

20mm long piece of 20mm diameter ali (straight from the rod) M6 thread in the middle.

The allen key bolt completes the picture.

(sorry for the floor, that's about 80 years old)

**blazerbotics** · 7th August 2011, 18:34

I just use self-tapers, can get them from anywhere. If the thread goes, just use the next size up screw.

**Max** · 25th August 2011, 12:32

I know the rules say that you must have an on/off valve on your main tank and a dump valve both reachable from out of the robot but would it be allowed to just have a ball valve connected to the tank which vents all gas downstream of itself?
And also could you have it so that the valve needs a flathead screwdriver to turn it on and off from outside the robot?

**maddox10** · 25th August 2011, 13:53

Originally Posted by Max

I know the rules say that you must have an on/off valve on your main tank and a dump valve both reachable from out of the robot but would it be allowed to just have a ball valve connected to the tank which vents all gas downstream of itself?

The on/off valve on the main tank, or the isolation valve if you use pin-valved main tanks, have the job to keep the weapon gas-less untill activation is called by the arena marchal or ringmaster.
The dump valve has to vent the complete system.

And also could you have it so that the valve needs a flathead screwdriver to turn it on and off from outside the robot?

Preferably no tools for activation or dump. And a flathead screwdriver is the last tool I would suggest for such application.
Allen key,Torx or socket wrench, yes. Philipshead or Pozidriv crosshead screwdriver, if nothing else is available. Flathead, no.