Re: DRO or not

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "J. Malte Stoeckhert
<malte.stoeckhert@m...>" <malte.stoeckhert@m...> wrote:

> Jon and the other who have replied.
>
> Thanks a lot.
>
> Your answers confirmed my thought that waiting to upgrade to CNC

at

> a later time make more sense.
>
> Malte

I could not have built the precision plates I needed to mount my
motors on my mill without first having the DRO. I bought a unit from
Shooting Star that uses conventional rotary encoders so now that it's
time to add my servo controls I wil use the feedback from the
encoders to close the servo loop. Ballscrews are a must in a servo
design so they actually presented a bigger challenge than the motor
mounts. I can't begin ot tell you how much more accurate it is to
draw a CAD drawing of a part, have it spit out the XY cooridinates on
a printout and go drill and tap the piece on the mill. Things
actually fit and I can build aluminum plates with sides that bolt on
with countersunk SHCS's and the don't look like they were layed out
by an optically challenged 6 year old!

BTW, measuring depth of cuts without a DRO (at least on the Z axis)
is a frustrating and time-wasting experience.