Re: [CAD_CAM_EDM_DRO] error in DOS not in cncpro

Hi Carl,

DOS really doesn't get into the calculations for a program! DOS handles
the files, and loads your programs, typically not much more for a
controller program. The processor (CPU) and/or the math co-processor,
on the other hand, do! I've never heard of a "number chain error".
Domain errors, Divide by zero errors, NAN (not a number) errors,
others. These are all MATH related, and DOS is out of the picture!
Either it's the processor, or the "math emulation package" (a software
library) that the controller program is built with.

Alan KM6VV

carlcnc wrote:

>
> Anyone ever hear the term "number chain"? A machinist used this
> phrase when discussing a mysterious move I have in a Gcode file
> run with cncpro.
> Problem appeared in Z axis when I ran a file to engrave a sign on
> my router. As program is running I will get a -Z move of aprox. .5in.
> It is not in the gcode, extensive testing of drivers,mechanicals
> proved it is not lost steps,coupler slip etc.
> I created a few new files from similar but not same drawing and no
> error. Went back and ran original file at slower speed SAME error!
> I hooked up to a new PC,fresh load of cncpro ran file SAME error
> created yet more new files ,no error.
> My machinist friend then told me that DOS could be causing the
> problem due to a "number chain error".
> Honest,I am not making this up! My router has been rock solid
> reliable.
> If anyone has a machine that with travels of X24,Y16 Z4 or larger and
> is using CncPro I would like to email this Gcode file to see if you
> get the same error. File is approx 5000 lines.
> email me offlist
> Carl