Re: Resolution and surface finish

--- In CAD_CAM_EDM_DRO@egroups.com, Jon Elson <jmelson@a...> wrote:

>
> Anyway, with my machine (Bridgeport), my tools and my materials
> (6061, 2024 mostly), I absolutely, without any question, find that climb
> milling gives excellent finish, and conventional milling gives a LOT of
> welded on chips, and anywhere from a rough finish to something
> resembling a wood rasp! This depends on the material, feed rate and
> cooling, of course.

It may also depend on flush coolant and having a ball screw or at
least a STRONG antibacklash nut on a lead screw.

DO NOT CLIMB MILL ON ANY MILL THAT HAS A LEAD SCREW!!!

is a good general safety practice for all roughing.

For finishing, taking very light passes can be done with climb milling,
but may also result in significant gouging and a scrap part.

Generally speaking with a rigid machine the horsepower, whether
electrical or actual ponies is about 1/3 when climb milling, for
roughing. For finishing it is nil, so check out both directions. You will
be amazed that in some situations climb milling is NOT the best
cuttting direction for finishing. I speak with the experience and
memory of having done it LAST week.

Best Regards,

Fred Smith
IMService