Buy an Axon, Axon II, or Axon Mote and build a great robot, while helping to support SoR.
0 Members and 1 Guest are viewing this topic.
I want to make a simple lever arm. Is attaching 2 servos onto a pivot joint to increase the torque a good idea, or would they be hard to align, making them oppose and stall each other out?
Also for the rotational motion, how would a modded continuous servo, say hitec-422, be for positional control with an encoder? I'm not expecting super accuracy or anything. Can continuous servos hold a position at all? Too bad hitec 360 servos are so pricey. Thanks for any help.
I was planning to put the arm joint on a disk about 10 cm in diameter. The arm being about 40cm fully extended. Then having a servo underneath the disk so the arm could rotate 360.
Right now I just want to get basic motion going, but eventually I want to have sensors attached to the arm so it could pan around and detect flames, color, or distance and be able to move back to where it detected the thing I was looking for.
The accuracy I was aiming for was +/- 5 degrees for rotation, but up to +/10 isn't too bad.
Ideally, I wanted a 360 servo so I could know my position, but to save money I was planning on using a continuous HS-422 and using the encoder method posted on the site http://www.societyofrobots.com/sensors_encoder.shtml. But I'm not sure how accurate that is, or how good continuous servos are at stopping. Can they hold position at all once modded for continuous, or are they basically geared motors?
If you just wanna go towards the position, you don't need much precision, as the angle of detection will widen as you get nearer.
I don't quite get what you mean about the angle detection, could you explain that?
Also for the encoder does it actually have to be transparent paper? I'd assume with plain paper there'd be a big enough difference between white and black for the IR detector to notice the difference.