Re: [CAD_CAM_EDM_DRO] machine ways was Re: Motor vs. Servo

Yo Ballendo;

Has anyone ever combined both slide and roller type systems? If 'twere done
right, it seems like it could improve things in a number of, "ways", like
improved movement/friction, adjustment, (just crank it a little tighter), load
bearing, and etc. :-)

Bill

On Sat Dec 29 01:47:51 2001, ballendo, <ballendo@...> wrote:

>Hello,
>
>We'll try to clear it up :-)
>
>Ways are a surface that something else slides upon. The term can
>refer to both the "slider" and the "slid-upon". Not all "ways" are
>in machine tools. For example, when old ships (and even new ships)
>were launched they slid down greased wooden "tracks" (planks, logs,
>etc.) which were called ways. The ship was said to be sliding down
>the ways into the water.
>
>The part of our tools corresponding to the "ship" is a way also. The
>two parts together are called "ways".
>
>In the ship description the "way" supports the ship that is sliding
>upon it. Often one of the two "ways"(sliding surfaces) of a given
>axis will be shorter than the other(just as the ship is shorter than
>its track). The short one may slide on the long one (as in the ship
>example), or the other way (pun intended).
>
>In machine tools we have two general types of way, the dovetail and
>box. Here is a link to the box style:
> http://www.mfg.mtu.edu/marc/primers/machtool/gif/mt3.gif
>
>Any decent picture of a Sherline mill or lathe will show you its
>dovetail ways. Also bridgeports, machinist vises, etc. Even better,
>at the Sherline website there is an instruction sheet which describes
>adjusting the gibs of these tools. The description there should lead
>you out of any remaining confusion.
>
>Now the fact is that the two parts of the dovetail ways and box ways
>both intermesh so it's sometimes hard to tell which is "in", and
>which is "out". We usually just say something slides "ON" the ways...
>
>A final thought to confuse things<G>: The term way was created before
>we had roller and linear bearings for our machine tools. So a modern
>tool may have parts referred to as ways, that DON'T SLIDE. They roll.
>And they might not be "boxlike" or "dovetail" at all. Since they
>function the same as the sliding type we still call them ways.
>
>The term "rails" is sometimes used (in place of "ways") for some
>types of modern linear bearings, and I've heard an old-timer or two
>refer to even the old-style sliding ways as rails.
>
>Hope we're a ways from where we started, :-)
>
>Ballendo
>
>P.S. To answer your exact question, I would say that the table slides
>on the saddle(x axis), and not even mention the ways... (The ways are
>a PART of the table and saddle.) The Table/saddle assy. then slides
>on the Machine Base(if a bedmill), or knee(for a knee mill) to make
>up the Y axis.
>
>> > Bill Vance wrote:
>> >
>> > Now I'm getting confused again, (don't worry it isn't hard to
>do). :-)
>> >
>> > So a table would slide _on_ ways, or _in_ ways? <snip>
>
>
>
>
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