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

The last thing we need to do is to redefine what has be accepted for
years. If the encoder isn't involved in the feed back loop then it
isn't closed loop. From the description given so far it doesn't look
like the encoder is part of the contol loops transfer function thus not
part of the loop and not closed loop.

Dave



Thom Carr wrote:

>Hello,
>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. Then, we could have the same type of "civil" discussions like we have with the " what's better, servo/stepper" . My thoughts are any improvement is better then none.
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>caedave <caedave@...> wrote:
>Definition, definition, definition, but I see what you mean.
>
>By definition your estop switches are closed loop in that they
>detect a state/condition and take an action based on that.
>
>This does not mean that the machine/devise as a whole
>works in a closed loop. That only comes with a fully
>integrated closed loops system, where every error
>is detected and corrected on the fly.
>
>Dave M.
>
>----- Original Message -----
>From: "Stephen Wille Padnos"
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>
>>True.
>>
>>And by definition, this is not closed loop for Mach3. Closed loop
>>control implies that the position error is used in trajectory
>>calculations. That's not what was described. The described
>>functionality is more like a traveling soft limit switch - it'll trip if
>>the actual position is outside a set range from the commanded position.
>>
>>It's open loop with an error bar.
>>
>>- Steve
>>
>>
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