Re: simple robotics project

On May 29, 2:19 pm, Joe Strout <j...@xxxxxxxxxx> wrote:
In article <1180460223.070494.63...@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,

dmehl...@xxxxxxxxxxxxxxxxxx wrote:
Those are some helpful suggestions that might really work. However, I
think there might be a small problem in that all of those products
control servo motors which do not have continuous rotation. One of my
motors must be able to continuously rotate because its function is to
raise and lower the robotic arm with a screw thread actuator. Is
there a motor controller that can use motors with continuous rotation
and servo motors?

The problem with a setup like that, is that the controller (whatever
that might be) has no way of telling when it has moved the arm far
enough. You need some form of feedback -- at a minimum, I would say,
something that can count how many times the screw thread has rotated.

That's pretty easy to do with a simple sensor (for example, an optical
interrupt switch) and a bit of code. But if you're averse to
programming, I'm not sure how you would accomplish this.

But then, I'm a newbie to this field too -- maybe someone else knows of
a ready-made solution.

Best,
- Joe

Couldn't I just determine through trial and error how many times the
motor needs to rotate in order for the arm to reach the desired
height. Once I have figured that out, I will never need to change the
type of movement I need. I will always be having the robotic arm
perform the same sequence for my application.

.

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