There DE! You heard it from the horse's, errrr, welll mouth.G Thanx
Harold. The great unwashed and inexperienced set can learn much from old
heads like you. I am happy to hear you never used a DRO and still did
tool-grade work. That statement presages a vast amount of honesty and no
small amount of pride, I'm sure. We should all have your experience but
'taint no way, no how, not in this lifetime! So, Harold, now that we are on
the soapbox, give us your take on those that purport to jump right into CNC
with absolutely no manual experience. I suspect they are mostly computer
programmers (or less) that believe all they peck out on a keyboard can be
easily done in the physical world.

Bob Swinney
"Harold and Susan Vordos" wrote in message
...

"DE" wrote in message
news snip---

I'm looking forward to winter and some extended chipmaking time.
I schooled on big industial iron 30 years ago, I must have had a good
instructor as everything has come back with litte reference to my
notes, We didn't have any dro's there, I was taught to use a dial
indicator for high tolerance positioning. I never have used a dro.

DE

DRO's are an incredible device, but my honest opinion is they cheat the
user
out of a proper learning experience. Having been trained as a machinist
in the late 50's, no such devices were at our disposal. I learned how to
run machines by applying skill------skill that will always be with you,
much
the same as hand grinding HSS tool bits. When you learn to machine
using
such devices as insert carbide and positioning devices, you tend to short
circuit that portion of your learning, which often leads to a lack of
knowledge needed in other operations. It's something that has the
potential to haunt you endlessly.

Backlash is a non-issue. The only time it matters is if you climb mill,
and
the machine is too loose, or when you don't understand how to work with
it,
which one often doesn't when a DRO is used.

Having worked in the trade for years, I can say, with total honesty, what
scrap I've made isn't attributed to backlash---it's from making other
stupid
mistakes.

I'm proud to say, I have NEVER used a DRO, and I've done a ton of work
with
tolerance restricted to a thou in many instances. A good portion of my
work
was building tools.

Did I mention all my work was subject to proper inspection by a an
independent source? I couldn't fake it.

Harold