4 ms·
I only partially agree. Just recently, pretty decent stepper motors have become very cheap (~$6 for NEMA-17), thx to all this 3d printer boom, and lots of thing
by krasin 12y ago
I only partially agree. Just recently, pretty decent stepper motors have become very cheap (~$6 for NEMA-17), thx to all this 3d printer boom, and lots of things are now finally possible to implement on a budget.
But I agree that good servos with high torque are still super-expensive.
- robotresearcher 12y agoSome manipulation tasks require force control, too.
- krasin 12y agoSurprisingly, this is also getting solved. For example, there're demos of self-calibrating cheap Delta robots which use force sensors on the plate: https://groups.google.com/forum/#!topic/deltabot/6fxnM20nYKc https://groups.google.com/forum/#!topic/deltabot/6fxnM20nYKc Sure, it's not yet there, but with the space of feasible is growing fast.
- robotresearcher 12y agoI'm not an expert on 3D printing, but it looks like this uses force sensing to make sure the effector velocity vector is nicely parallel to the position of the base plate. The effector is not exerting any force on an object. So it's velocity control not (the more demanding) force control. Let me know if I have misunderstood what's happening here.
- krasin 12y agoYou're right, I was slightly off in my example.