war robot

[sahilkatoch]

i m designing a war robot
i need assistance in desining axe which swiftly move down to attack enemy robot
which type of motor should use in operating that axe

[ArcMan]

Motors by themselves are not good at quickly moving a mass (like an axe) from a standstill.  You would want to couple a flywheel to the motor and clutch in the axe arm when you wanted it to swing.

Another option is to use a cylinder to swing the axe.  It would have a compressed gas tank to drive it - like a CO2 tank.

[Admin]

Big robot? Small robot?

What do you want the axe to cut through?

Always give us as much info as possible and include a basic design. Subjective questions will only get subjective answers



edit: I can't spell!

[Xone G0D]

 If this robot is for a battlebots competition, the only two recommended ways are High pressure gas actuator or the way "Grendel" the battlebot did it.  I tried looking on line for specs or some kind of mechanical diagram for Grendel's, but to no avail.  Daniel Rupert's sites, the guy who built it, are all out of commission.  However, here is a video of Grendel defeating one of my favorites. Grendel is the black one with the monster face on the spike.

[youtube]http://www.youtube.com/watch?v=kqZAVjP1TYE[/youtube]

 The Grendel mechanism worked by a motor pulling a cable to tension a spring, after all the tension was achieved the clutch would disengage forcing a lock to secure the tension arm in place. When ready, One press of a switch and the lock would release, the spike would come down with all the force of the spring. This is cheaper to make but not quite as exciting as a HPG powered actuator action as in the case of Grant Imahara's DEAD-BLOW.

http://www.deadblow.net/Pages/99weapons.htm
http://www.deadblow.net/Pages/00WEAPONS.HTM

In either case, instead of a spike or hammer, but an ax at the end and you pretty much have your weps sys. 

HOWEVER, if you are making a firewood robot to operate and chop wood in war environment... I need more details...   


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