Re: [CAD_CAM_EDM_DRO] Announcement: Mach3 is now closed loop!

Alex Holden wrote:

>On 26 Jul 2005, at 13:24, Thom Carr wrote:
>
>
>>At some point, it would be time to use new defining terms for both
>>"Cosed Loop" systems. Something like Closed loop/ correct and
>>Closed loop/ detect.
>>
>>
>
>Closed loop is a well defined term in control systems engineering. I
>would say the new Mach3 feedback feature is open loop with error
>detection. It's not closed loop in the conventional sense that it's
>able to modulate the power supplied to the motor based on how far
>it's lagging behind (or ahead of) the expected position, but at least
>it is able to notice and stop the system (hopefully before trashing
>the workpiece) if the steppers lose steps.
>
>
>

Yes, I agree with you, but got yelled at by several people for
making this distinction. 1/10th of a second on a router is a pretty big
disaster, I suspect.

Jon