Team MedBots

[Max]

Re: Team MedBots

Today I tested the ram with the QEV and large piping, the system was only at around 5bar as it was leaking like mad but eventually it will run at 10 bar. I thought it was very impressive but my mum who was filming was no so happy with the massive bang and has now quit her role as camera woman :sad:
Anyway here is the video:
http://i1261.photobucket.com/albums/ii5 ... 473696.mp4

[Liftoff]

Re: Team MedBots

Eh...I quit using thread tape, its a pain to obtain a leak free joint with it
I find thread locking compound much better - btw the camera person did get the fright of her life! I did too when I fist fired mine

[jonny]

Re: Team MedBots

looks great, and with a ram that big it should be incredibly powerful. i look forward to seeing it and hopefully fighting it at maidstone!

[maddox10]

Re: Team MedBots

Imagine a 1 bsp valve @50 bar opening.... That is what I endured 3 weeks ago.... Ringing ears...

[Max]

Re: Team MedBots

Hi,
For the locking mechanism for my flipper arm can I just prop the flipper arm up above the rams maximum extension so if the ram fires it will not hit the flipper arm?

[Gabe01]

Re: Team MedBots

The problem there being that the ram is still moving and therefore still a hazard to a miss placed arm, finger, hand etc. By locking the flipper down over the ram and securing it properly nothing can move.

[Max]

Re: Team MedBots

Hi,
When using woodies QEV system won't the ram fire when you the dump valve?

[Max]

Re: Team MedBots

I have tested the system and it does fire when you use the dump valve! Doe this matter? I'd rather not be firing the ram into the flipper arm when the flipper arm is in the locked position as it will start to damage the robot. I'd rather prop the arm up so the ram fires but doesn't hit the arm. Does that sound acceptable?

[Max]

Re: Team MedBots

Hi,
I am thinking of building a heavyweight and am thinking about motors. I know I could use wheelchair motors but would like more power and would like to build the gearbox. I have a few questions, could you use a shunt wound motor, and would you need a lower rated speed controller to control it? Also I think someone said they used forklift motors, am I right? What kind can you use (eg. From the pump or drive of the forklift)?
Apart from wheelchair motors and Bosch 400s or 750s, what other motors could I use?

[plargen]

Re: Team MedBots

there are these if he still sells them

http://users.breathe.com/planteng/motors.htm

and ther are the iskra 800w motors ..... i think there used in tail lift units generally

just found these which should be powerful enough

http://www.ebay.co.uk/itm/36-VOLT-800-W ... 982&_uhb=1

[maddox10]

Re: Team MedBots

Bullfrog uses the Iskra AMG 1200W.

Heavier than a Bosch, but sturdier build.

[Max]

Re: Team MedBots

Thanks for the links and info!
What size hydraulic ram is needed for a good crusher heavyweight?
Edit: or what force is needed from the ram as force obviously it depends on pressure)

[maddox10]

Re: Team MedBots

Tiberius IV uses a 70*148 ram, @4000 psi delivers 10 000 kg.

Of course, the leverage and the geometrics are important too.

[Max]

Re: Team MedBots

Hi,
Does anyone know if you can fit the brass on/off valve from a roaming robots 20oz co2 bottle onto a 12oz paintball bottle?

Also has anyone combined pneumatics at hydraulics in a hw crusher? That way you can use the speed of the pneumatics to grab someone quickly then crush them with the power of the hydraulics.

[maddox10]

Re: Team MedBots

Why would you use the heavy screw valve like on the 20oz bottle when paintball bottles can be equipped with an on/off valve that does the job equaly well, for less weight and size?

On the combined Pneumatic/hydraulic machine.

Yes, the was one. The Kraken.

1 thing tough, you'll need to keep the pneumatics and hydraulics seperated, otherwise you're probably falling under the accumulator rule. As in not allowed.