re:Re: Handwheels, retrofits, manual machining

>
> Then I get to thinkin' that MAYBE the REASON you can get away with

it

> IS the motor drives being powered down!!?
>

Hello DRO DRO DRO! of course Why else does Accurite make glass
scales?

> >lot of practice & hands-on usage to tell the difference

between .002

> >and .003 depth of cut.
>
> Fred, You've got to be kidding! NOT appropriate!?? I DO have these
> hand skills, and I am QUITE pleased to use the consistency and
> repeatability of the control to give me GREAT results time after
> time. And others with lesser "hand skills" can also create great
> parts.
>

IF you know your process, CNC is best. If you are working in new
metal or other materials, or new tooling, lubricant, etc. I can make
the first one manually and then the next ones (if needed) can be
done CNC. CNC is more expensive to test tools and process than
manual. My way makes no scrap. The other way the first piece is VERY
iffy. This is especially true for those that don't know the first
thing about machining. You would not believe some of the horror
stories I head about the first time some one uses their CNC mill or
lathe. It usually contains the word Kaboom somewhere.

> >The important place to have this kind of control is where the

sound

> >and vibration of the machine make the action of the cut impossible
> >to sense by sight, smell or sound. Since the hand feel is

actually

> >more accurate and reliable than the others, it can be used in this
> >kind of cutting condition.
>
> Again, You've got to be kidding. THIS is EXACTLY the place where

CNC

No only true if you know the process. Without knowledge of the
process the CNC machine makes junk quite quickly. That's one of the
main problems that CNC shops have in hiring workers. Everybody wants
to be a programmer and keep their hands clean. If they don't know
feeds and speeds and metal, as in having cut a few parts with
handles, they are a lot longer in getting up to speed. Many's the
time I have walked up to a machine and cranked the feed rate override
up by 50% or more. The guy doing the cutting thought he was doing
great based on his experience. He never had a crank in his hand and
pushed it as hard as he could, getting a feel for the metal and the
tool in the process.

> A coarse screw will "transmit" more of the "feel" to the operator
> than a fine screw. A fine screw will allow better "control".
>

It doesn't matter coarse or fine it's the sensing of teh cutting
process that is important. Some of this can be done by simply
placing your hand on the table of the machine while it is cutting.
That is still only part of the understanding of how hard you can push
a 1/2 inch end mill without burning it in say 4140. What is better
to cut deep vertically or wide horizontally with an endmill, given
the same cross section of material? I guarantee you can answer this
question in about 5 seconds by turning the cranks. You may never
know if you have just used a CNC cntrolled machine.

>
> >Gotta throw this out too - there are lots of rumors about new
> >Windows based controllers coming soon.
>
> You said controller-ssss, as in more than one.. What means "soon"?
> Who??

3 more than ones, 2-6 months, and if I told you I'd have to kill
you. ;-)

Best Regards,

Fred Smith
IMService - We are THE source for low cost Cad-Cam

http://www.imsrv.com