Re: simple robotics project

dmehling@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?

You might be able to rig up a limit switch to trigger when the arm has
reached a certain point. I'm not sure if any of the devices I noted has
a switch input, but they might. You'll want to check that. Otherwise,
the controller couldn't care less whether it's driving a regular or a
modified servo.

I doubt you're going to find something commercially-made that does
precisely what you want, at least not without it costing a fortune. How
about asking around your work or school to see if the electronic parts
of the project can be done by someone else. It would be cheaper than
buying something ready made.

I recall at the start you said your budget was up to $500. As the parts
to this shouldn't cost more than $100 (not including the computer) that
leaves $400 to pay someone. You probably couldn't find an automation
expert at that price, but a senior in high school or a
freshman/sophomore at the local college that's into robotics would
probably jump at the chance to make that kind of money.

-- Gordon
.

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