Re: [CAD_CAM_EDM_DRO] CNC Process

CADMAN,

In most cases when you are working with the Z axis you want to set the top
of the material to 0. Just be sure that when you post from your cam package
that you tell the program that the top of the material is 0 and that down is
a negative number.

In the case where you have removed the top of the material and wish to
change the tool, be sure to have a scrap piece of material around that is
the desired thickness. Just use the scrap material to find the new Z zero
point.

Bob Campbell

----- Original Message -----
From: <cadman@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, March 29, 2001 2:07 PM
Subject: [CAD_CAM_EDM_DRO] CNC Process


>
>
> I am new to using a CNC machine. I built a small (made of wood) 3
> axis mill so I could play and learn with. Later I will purchase a
> Drill/Mill and convert it. As of today I am using CNC-Pro
>
> I don't have any problems with the CAD/CAM software side of things.
> It is running the machine that has me stumped. The areas that I have
> questions are:
>
> 1. Home position.... When I press the Home button it moves my
> axis all the way to one side and sets the coordanants to 0,0,0 should
> this be left at 0,0,0 or should I touch my tool on top of the material
> and call that 0 in the z-axis?
>
> 2. When I need to change a tool I will loose the z-axis tool
> location. do I again touch the tool on the top of the part for z=0 or
> should I re-home?
>
> 3. If I rough the part and loose the top of the material (by cutting
> away all the material on top) How can I set the tool again?
>
> I am so confused about setting the machine up for a job. I have the
> limit (home switches) set at the far positive position in all axis. Z
> moves up. X table moves to the left. Y table moves to me. So this
> means that the tool in relation to the table will move Z-up, X-right,
> Y-Away.
>
> When I use the homing feature it sets 0,0,0 at the home position.
> This means that I always cut in the negative space. Is this correct?
> What is the best method?
>
> Thanks
>
> CADMAN
>
>
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