Re: [CAD_CAM_EDM_DRO] Re: deskcnc servo driver

So these errors are best avoided by using motors that are strong enough
to keep up with the feeds or feeds low enough that the motors can handle?

Setting the gain and damping on the Gecko 320's will also come into
play. What is the best way to do that without access to a scope?

Am I correct in thinking that these issues mostly come into play when
making heavy cuts at high speed?

Sorry, about the questions, I'm an info junky.

Greg Kamysz

> Gregory Kamysz wrote:
>
>
>>With servo controls how does the software know the machine has reached
>>it commanded position if it starts to lag behind? I understand that the
>>servo control knows that the motor is behind but if the pc sends the
>>next command and it hasn't reached it's destination from the previous
>>command what happens?
>>
>>
>
> True closed-loop servo systems have position info available at the computer.
> The Geckodrive systems don't generally work that way.
>
>
>>I guess Geckos will only allow 125 step lag before faulting. Is this
>>really a problem?
>>
>>
>
> No, normally you don't want a lot of following error. Except in some
> systems
> with very high resolution encoders, the 128 count error limit is already a
> bit large. For instance, in a system with encoder resolution equal to
> .001",
> an error of 128 counts is over 1/8"!
>
> Jon