So the "comparison" is between an open-loop stepper and a closed-loop servo. Apples and oranges comparison. What about the comparison between a "closed-loop" stepper and a "closed-loop" servo? Apple to apple comparison? It has been suggested that steppers can "lose" or "gain" steps. With "open-loop" this issue cannot be determined. With "closed-loop", if this issue is occurring, it should be able to be remedied. Thoughts?
Howdy. Cannot access your site from UK :( It says "Important note for site admins: If you are the administrator of this website note that your access has been limited because you broke one of the Wordfence firewall rules. The reason your access was limited is: "Access from your area has been temporarily limited for security reasons""
@@DougBirdacks Nope... I have da same problem and it is the SITE that used the WORDPRESS firewall. Please read it more carefully and I think you are a little offensive...
I was under the impression that applications for one or the other was more than just torque and RPMs? Arn't steppers "angle" based and servo's are velocity based? Meaning you'd not use a servo for moving a printer head that needs very precise control, but you'd use it for rolling up blinds or something?
+John Michael Stock Thank you for your question. Both steppers and servo's can operate in position control mode to move to a very specific position. During the move itself, they also travel at a commanded velocity so they can ramp up from zero speed at a given acceleration rate then decelerate back to zero speed and stop at the desired position. A servo would typically be overkill for an application such as rolling up blinds.
Sir, can you answer a question for me about Stepper Motors? Question: If a Stepper Motor is rated at 4 amps does that mean that it can output 4 amps if used as a generator?
If I want a *STRONG* motor to move as *FAST* and *SILENTLY* as possible, with abillity to remember it's current *POSITION* , even after cutting off the power and turning it back on again, which one do I need? It's for an human-sized animatronic-robot that can move as fast as a human and pick-up objects. Without sounding like an 1980's printer with every moved inch... 😂
Continuous rotation servos can rotate continuously. And most standard servos can be trivially hacked to become continuous rotation servos. (Just how trivial that hack is depends on which model of servos you're hacking.)
I think you mean servomotor used, for example, for radiocontrol. Those, normally small, servos, use a position sensor based on a potentiometer (variable resistance). That is a simple and cheap position sensor. But so they can't rotate continuosly due to that. They are limited to less tan 360º or less. Some others using, for example, light encoders can rotate more times. Quite probably the encoder shown in this video is of that type
