Re: [CAD_CAM_EDM_DRO] Re: 3D Contouring - Loss of Accuracy

Lee Studley wrote:

>
>
>>Hi Peter,
>>I've wondered if somehow a software provision/mechanism for
>>periodically re-home-ing during long duration programs could be
>>done. This is sort of a bandaid fix, but would reset the
>>accumulating error. Also, I've been (just) thinking of how one might
>>make a super accurate home position switch.
>>Just ideas,
>>-Lee
>>
>>

I was able to go down and check to see that the "Automated Limit Switch
Checking while mid-File" function has been applied in the New Flashcut
version.

It IS !! Like I mentioned earlier, I used/played with this technique on
an older version.

It is used like this:

Install a G28 where you want the machine to begin the automated limit
switch check. G28 tells the machine to run at rapid to machine 0.
Install a G27 this tells the control to begin the limit switch check
routine. If preferred, it can be told to "poll" the switches numerous
times and automatically reset the file "if within preset guidelines" or
Pause, or just "always reset zero"
Install a G29 this tells the machine that After the Reset of Zero, run
X-Y to the line right before the point of the earlier G28 call at rapid,
then plunge to the previous depth and continue.

Though not my experience, It is a very nice feature for those who are
afraid to walk away from a Stepper Driven system thinking that it is
about to fall off the edge of reality at any moment. :-)

Just a heads up !

Chris L