Re: [CAD_CAM_EDM_DRO] BDI and servos

Bob Simon wrote:

>Thanks, that's what I wanted to hear! I perused Tim's web site for the
>"hard-way install" and concluded that it's a formidable task. I have some
>background in UNIX systems and would like to try it sometime, but the BDI
>seems the way to go for the time being.
>
>How does EMC handle long streams of cutting data? Can it command non-stop
>motion continuously from the hard drive or just the physical memory? I
>can't seem to find any specifics on how EMC handles long programs.
>
>

Yes, it has a long horizon lookahead, and will run programs of unlimited
length. It has several
different schemes of lookahead and acceleration profiles that can be set
up, if you don't mind
digging into the code a bit. The default is look ahead with linear
acceleration, and as soon as the
deceleration would begin for the current move, the acceleration of the
next move is interpolated
in. EMC can handle at least 20 blocks a second on a 100 MHz Pentium
classic, and a lot more
on a faster machine. People on this list have reported running programs
over 1 MB on EMC.

Jon