Easy Servo Drive?

[JAZZCNC]

Any idea why the numbers for the parts are different?

Yes the HBS are the early version of the drive and superceded by the ES-D. Pretty much the same drive just with updated software.

It's a like the EM806 superceded the AM882 which are basicly same electronics with updated software. Slight improvement in smoothness with the EM compared to AM but nothing to get excited about or a pay lot extra for.
Similiar with the ES-D over the HBS thou I do think there as been lot more tweaks and some performance gains compared to the AM/EM range.

The Easy Servo works exactly like a Servo system it just use's a stepper motor so can't spin has fast or has the linear torque like servo motor offers.
In terms of accurecy then servo's resolution is usually higher with higher count encoders but at this lower level with lower grade ballscrews etc then stepper system if sized and tuned correctly will give them a good close run chase on accurecy.!

Now let me just say this which may make you look again at why you want this closed loop or any Servo system for that matter.?

Closed loop just means it will closely follow the path it's be told to follow and if outside of it's set parameters it will fault.
If it strays from the path slightly the electronics will bring it back on path.! . .. BUT the fact still remains it's lost it's way along the path and the damage is done. It's cutaway material that can't be put back.?
Yes when it finishes the Job it won't have lost it's starting position and will go back to exactly the same place. BUT still the fact remains it strayed and cut material it shouldn't have so job is wrong.!

Like saying that's nice straight edge but whats this squigly bit then goes straight again .? Oh the servo got lost for fraction of second but it's ok it remembered where it was and carried on ok.!!! . . . . No the thing is still fubar because it shouldn't have squigle in it.!

Steppers if sized and tuned correctly are perfectly fine. For larger machines or machines that need rapid movement then servos rule but at lower level then steppers are not far behind servos and IME servos offer nothing other than extra power and slightly smoother if tuned correctly. The Closed loop means nothing really, lost is still lost be that a little or lot still means the job is wrong.