Gentlemen, Having no experience with steppers I will still offer my opinion. Take it as you will. :)
The case for steppers seems to hinge on cost ie: steppers are less expensive than servos. Steppers cannot maintain position like servos because of the aforementioned lack of increased power if the power need increases. The answer is then install steppers with more power so you never encounter the power need in excess of stepper ability. When you design to this parameter the cost then approaches servo cost hence the 'need' for steppers is reduced and servos become the appropriate answer. Until someone is able to design a cheap stepper with the ability to increase power like a servo then the argument for closed loop steppers is not as strong. You still may be able to keep cost down depending on how the steppers are mounted and the room you have on the machine and in the electrical cabinet and the wiring requirements. Just my thoughts. thanks Stuart On Tue, Jan 19, 2016 at 5:31 AM, andy pugh <[email protected]> wrote: > On 19 January 2016 at 11:14, Lester Caine <[email protected]> wrote: > > > > The newer 'closed loop' motors are essentially using the same approach, > > but rather than simply applying the same power for longer > > I don't think that this is what the original poster was asking. I > think he was just wanting to close a position loop with linear scales > on the axes of his stepper-driven machine. > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Addressee is the intended audience. If you are not the addressee then my consent is not given for you to read this email furthermore it is my wish you would close this without saving or reading, and cease and desist from saving or opening my private correspondence. Thank you for honoring my wish. ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
