Re: path efficiency

--- In CAD_CAM_EDM_DRO@yahoogroups.com, wanliker@... wrote:

>
> I think we are moving a bit past the basic purpose of the group,

when we

> start discussing big commercial machine optimizations.

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Optimization (according to Webster):

: an act, process, or methodology of making something (as a design,
system, or decision) as fully perfect, functional, or effective as
possible; specifically : the mathematical procedures (as finding the
maximum of a function) involved in this

-----

All machine designs large and small should take into account the
intended use and application of the completed machine, so as to
deliver as close to or better than a result as possible. Many that
make their own cnc machines are just happy that it works. Most
would also like one that is a useful tool.

As Dave said, it takes him at least 1 minute to change a tool. He
may want to make a basic machine design decision that permits him to
run 2 parts ( or more) at one setup on his machine, saving 1 minute
per tool per part, everytime he runs any parts with more than one
tools. For example drilling two PCB's with 5 hole sizes each, at
the same time, could save him 5 minutes. He might decide to double
or quadruple his machine table size and travels to accomodate
multiple parts. Preset tool lengths and automated length gaging
could also come into play, depending on his need for gadgets and how
he values that extra minute per tool change.

On the other hand, if his machine design will be used to run the
kind of parts that take 5 or 10 tools per setup (like most fairly
simple milled parts), he may decide that it is justified to make a
machine with provisions for a quick change or even automated tool
changer. Either of these considerations can make a dramatic
difference in the final machine that Dave designs. ( this could
affect planned Z-heights and travel, axis motor size, spindle
mechanical and electrical design, etc.)

Cad-Cam systems like Vector-Cam can be used to match the toolpaths
to the machine design criteria.


Fred Smith - IMService
http://www.cadcamcadcam.com/hobby