Re: [CAD_CAM_EDM_DRO] Looking for a decent milling tutorial

Danny,

In wood working we use a feature called tabs to keep parts from coming
loose. You should be able to do the same thing with your metal parts. It is
a thin tab at several point. You then can cut them off and grid or sand
them off.

Robert Colin Campbell
Bob Campbell Designs
www.Campbelldesigns.net
Mach 2/3 breakout boards
Relay boards
Spindle Speed boards
Stepper motors
Plasma Torch Height control

----- Original Message -----
From: <dannym@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, January 27, 2008 2:01 PM
Subject: [CAD_CAM_EDM_DRO] Looking for a decent milling tutorial


> I'm hoping to get started with a Taig CNC mill soon for quite a few
> projects, probably with Mach3.
> I have not done milling before and can already see some obvious questions.
>
> I have a 2D part that needs to be cut out through the entire depth of the
> aluminum. How do I keep the mill from striking the XY rails underneath?
> Stick plywood underneath it or what?
>
> Say the part's a circle (it's not, let's just assume) cut out of a square.
> Obviously the part's going to become loose & bendy partway through and
> eventually free itself. What's the best practice? Is there a software
> feature to leave some corners connected at first and then work them down
> last or what?
>
> Say my clamps are 1" tall and I'm using a short mill on a piece of 1/8"
> aluminum. The collet will strike the clamps if it drops down far enough
> and gets near the sides. What's the best way to address the problem? I
> could always put a block of wood underneath it to bring it higher up in
> the clamp, but say I'm engraving the surface. If the part's not precisely
> flat the engraving will be shallow on one side and deep on the other and
> wood is hardly flat. What practice would address this problem?
>
> I see that many endmills are not good for plunging into metal. What are
> the limits of plunging? I mean I can do a pocket without a starter pilot
> hole, can't I? Is that plunging restriction only applicable when there's
> not much lateral movement, like less than half the width of the mill or
> something?
>
> Is there a decent online tutorial for these basic questions?
>
> Thanks,
> Danny
>
>
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