Aluminum Classic valve?

[steveg]

Practice makes perfect!

I do think that Playing with +400psi does demand a lot of
care and attention however.

A little more background regarding measuring instruments
as well.

While there is far more than a vernier and micrometer
used they are the most common intruments used,
especially for turning.

I'll use what I own as examples

first the vernier: these are used when tolerances of greater that +/-.001 are called for.

my scale vernier has a smallest resolution of .001" and that assumes that I can still read the lines
(Which I can't anymore especially with my latest glasses )

my mitutoyo digital vernier has a .0005" resolution but
again only +/-.001 accuracy

Micrometers: are available in .001 resolution and .0001 resolution. they are available in even smaller resolutions
but that becomes laboratory grade and increadable expensive.

my Starret .0001" mic has a .00005 display and a .0001 accuracy.

It is true that both Fanuc and Meldas controls can be capable
of .000 004" resolution (actually .0001mm as they are native metric) but there really are very few machines
are capable of using it.

As you can tell those numbers are part of my work and life.

[cphilip]

I am learning a lot!

Yes I see so then these particular ones you mention are indeed capable of the millionths things... That is incredible realy. I can understand why its hard to fathom.

I think these guys have six or eight of these machines in there. Forgot to count em. Some older and some newer ones.

[steveg]

I should add that the standard specification for almost all
cnc machines are +/-.0002 or 2 ten-thousandth

a millionth is .000001

a machine that is capable of machining to .0001"(+/-.00005" positioning)
consistantly is considered to be a fantastically good
machine and would also be a fantactically expensive machine.(250 000 is not fantastically expensive)

As a lathe that is , this is comfortable into the range of
cnc grinders, in fact the reason that they exist.

It occurs to me just now that milli as in millimetre
or I suppose milli-inch means one-thousandth

perhaps some misunderstanding?

I guess that i shouldn't add (and no professional bias here ) Mazak could be considered the Brass Eagle of the CNC machine world

[Python14]

Just an industry question....With CNC systems becoming the standard, it seems a teenager with a good knowledge of programing and physics can operate anything in a machine shop. I may be wrong though, so forgive my ignorance. But my question none the less is, Is there still room for machinists who still do it manually? I'm really interested in this field of work and want to if I have a future in it.

[Cristobal]

Originally posted by Python14
Just an industry question....With CNC systems becoming the standard, it seems a teenager with a good knowledge of programing and physics can operate anything in a machine shop. I may be wrong though, so forgive my ignorance. But my question none the less is, Is there still room for machinists who still do it manually? I'm really interested in this field of work and want to if I have a future in it.

Its not quite that simple.

Drawing up the design on the computer is only the first step... then you have to transform it into commands that the machine can understand. That's the role of you CAM software -- and to use the CAM software effectly you need to know how the actual machining is going to work. You have tell the computer what sort of tooling its going to use, how fast to run, depth of cut, feed rate, order of cuts, etc... In many cases you can give the program some of the information and it will know enough about what you're doing to guess at the rest -- but you still have to check that it guessed right, and tell it to do something else if necessary. And of course, you need to know what your machine is capable of, what its funny little intricacies are, and even how to set up your part on the machine (not always as simple as putting it in a vice). There: I'm no expert in CnC machining, but that ought to give you an idea of the knowlege base involved. If someone who knows more wants to correct or add, then feel free.

But basically if you don't know enough to mill it manually, you'll be a bit hard pressed to do it on the CnC, because all it will do is "crank the handels" for you -- you still have to tell it what to do.

Not to turn you off to machining though As long as you've got someone who knows what they're doing to walk you through the process, you can do a lot of cool stuff, even if you don't know a lot yourself. As you gain experience, pretty soon you'll be showing somebody else how to do it.

[nerobro]

actually.. if you're making it yourself, the RT shouldn't be much more troubble... But you'd have to buy more parts from AGD. A rebuild kit, the tube/regpin, adjuster, spring pack, on/off, and reg piston should cover the AGD branded parts, along with the LX kit.

[Python14]

Now I'm all giddy and excited bout going to the machine shop.