Re: [CAD_CAM_EDM_DRO] Precision

Hi Chris,

Yeah, I wondered if you had a Z. Checking a pair of X axis would be a
start (you have two X axis, a gantry?). Measure from your frame bearing
point out to the gantry.

What do you have for ways? Somewhere you should be able to check
alignment with a machinist's square, with the way for X checked against
the way for Y. The ballscrew's must follow these (they have to be
parallel to the respective way).

Are you looking at the cut metal, saying it is out of square? I'd want
to see what a scribe (plotter pen?) would draw. If the scribed/drawn
lines are square, and the ways are square, then it's possibly due to the
torch? Just a thought. I've not worked with the torches, just mills
and plotters. Oh, and moving probes around in water phantoms for
radiation therapy dosimetry.

HTH

Alan KM6VV


Chris Clough wrote:

>
> Alan,
> No reason to worry about the Z-axis - don't have one, as it's a 2D table
> (plasma) What would be the easiest fix to make them perp? Just make sure
> they are the same distance from the end of the ballscrew as the other?
> -Chris
>
> -----Original Message-----
> From: Alan Marconett KM6VV [mailto:KM6VV@...]
> Sent: Thursday, December 06, 2001 8:15 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Precision
>
> Hi Chris,
>
> Sounds like your axis are not perpendicular. It's not the axis itself,
> rather, it is the relationship between the two (or 3, how about Z?).
>
> Alan KM6VV
>
> Chris Clough wrote:
> >
> > Ok... doing some testing with the CNC, just trying to figure out my
> > error in the building of the table.
> > My y-gantry works quite well, very straight cuts. I'm using a plasma
> > torch for the cutting system by the way. My problem is when cutting a
> > square two edges are perfectly parallel, but the other two are angle
> > (1/32" deviance).
> > So... is this problem in the x-axis? It usually occurs when it's going
> > that direction (table wise)
> > Any help would be great,
> > -Chris Clough
> > Xtech Engineering