Re: [CAD_CAM_EDM_DRO] Re: EMC stability

Ray wrote:

> From: machines@...
>
> <s>I came across one referance to one of Matt Shavers customers who
>
>> noted that "We are still having run aways"
>> Can anyone shed light on this<s>
>
>
> Releases from about two years ago now had a few places where it was
> possible to cause a divide by zero. Most of these showed up as NAN
> (not a number) in the position windows and would shut the machine down.
> Some just caused an axis to head off toward infinity at rapid. Ian Wright
> found several of these soon after the backplotter was released.

Yep, this is solved now, and am I glad! The machines we had in the
beginning were all servo Bridgeports with a top axis speed of 250-300
ipm, and when they "took off" it was nerve racking. It was caused, as
Ray said, by math errors that have since been corrected.

That said, I wouldn't leave any machine running unattended. If need be,
do your deburring where you can keep an eye on things as you never know
when the coolant flow will get plugged up, or chips will need to be
blown off, or the tool will get dull, etc. I've nuked a few end mills
through inattention when a stringy chip knocked the coolant nozzle away
while I was really hogging through steel.

Matt