Author Topic: How powerful a stepper will I need?  (Read 1508 times)

0 Members and 1 Guest are viewing this topic.

Offline Marauder_PilotTopic starter

  • Jr. Member
  • **
  • Posts: 9
  • Helpful? 0
How powerful a stepper will I need?
« on: January 23, 2008, 11:23:56 AM »
One of my current projects needs a stepper motor that can rotate a roughly 6-8 pound (Still not 100% sure, so say 8 pound to be sure) aluminum container to a fairly precise degree. How powerful a stepper motor will I need to be able to control something like this?

Offline hazzer123

  • Supreme Robot
  • *****
  • Posts: 460
  • Helpful? 3
Re: How powerful a stepper will I need?
« Reply #1 on: January 23, 2008, 12:04:57 PM »
Where on the aluminium container is the axis of rotation?

Could you please tell us a bit more about your problem. The shape of the container, desired speed of rotation, accuracy.
Imperial College Robotics Society
www.icrobotics.co.uk

Offline Marauder_PilotTopic starter

  • Jr. Member
  • **
  • Posts: 9
  • Helpful? 0
Re: How powerful a stepper will I need?
« Reply #2 on: January 23, 2008, 12:09:23 PM »
Centered. The project in question is going to be an air cannon with a revolver-style drum. With each shot, the drum will rotate and bring up the next chamber (Filled with a nerf rocket or a paint grenade or a length of rope or whatever else I need/want to propel faster then I can throw). Speed, I'd like to be able to have them rotate in at most a second. Accuracy needs to be within a few degrees-whatever is in the chamber won't have to line up *perfectly* with the barrel every time, but the closer the better. (However, they'll likely be somewhat loose in the barrel, and probably with a degree of squishyness or in a sabot that will let them pass through minute differences in alignment between the barrel and the chamber).

Offline Admin

  • Administrator
  • Supreme Robot
  • *****
  • Posts: 11,663
  • Helpful? 169
    • Society of Robots
Re: How powerful a stepper will I need?
« Reply #3 on: January 23, 2008, 12:14:17 PM »
What you need to calculate is rotational torque, based on mass and moment of inertia.

You can find equations in google/wikipedia.

If you get stuck, post what you got and we can help you from there . . .

 


Get Your Ad Here

data_list