I have noticed that quite a lot of people position parts in CAM in the
positive quadrant of the Cartesian plane. It makes a lot of calculation and
planning easy so it makes sense.

When you place a vise square on the table the moving jaw to accommodate
different size stock is in the negative direction usually. This requires
touching off and relocating ZERO for Y a requirement for every single job or
part of a job after rotating a part. Even those that don't require a huge
amount of precision.

The obvious solution is to design a vise with the screw drive on the other
end positioning the moveable jaw in the positive direction.

The less obvious but much easier solution, is to work in the X+ Y- quadrant
or move your work to X+ Y- quadrant after you have done all your
calculations, layout, and planning.

(FYI: I tend to work with XY ZERO in the center of my stock because I do a
lot of rotations around an axis and/or symmetrical work, then I move my work
to the positive quadrant so I can just touch off rather than touch off and
calculate.)

I was trying to develop some work processes that allow me to do certain
types of jobs and setups faster, but then after typing all this it occurred
to me that for most of you guys its probably all mind numbingly obvious.
LOL.

Bob La Londe wrote:

The less obvious but much easier solution, is to work in the X+ Y-
quadrant or move your work to X+ Y- quadrant after you have done all your
calculations, layout, and planning.
Yes, and that is how I do work where it makes sense to touch off to
the vise jaw and keep that for multiple setups. I just did a part
a couple days ago like that.

Jon

On Mon, 19 Aug 2013 14:08:16 -0500, Jon Elson
wrote:

Bob La Londe wrote:

The less obvious but much easier solution, is to work in the X+ Y-
quadrant or move your work to X+ Y- quadrant after you have done all your
calculations, layout, and planning.
Yes, and that is how I do work where it makes sense to touch off to
the vise jaw and keep that for multiple setups. I just did a part
a couple days ago like that.

Jon

Vice top left is 0,0 for most of my work. Results in parts mostly in
the X+,Y- quadrant. But then 0 doesn't move.

Karl

"Karl Townsend" wrote in message
...
On Mon, 19 Aug 2013 14:08:16 -0500, Jon Elson
wrote:

Bob La Londe wrote:

The less obvious but much easier solution, is to work in the X+ Y-
quadrant or move your work to X+ Y- quadrant after you have done all
your
calculations, layout, and planning.
Yes, and that is how I do work where it makes sense to touch off to
the vise jaw and keep that for multiple setups. I just did a part
a couple days ago like that.

Jon

Vice top left is 0,0 for most of my work. Results in parts mostly in
the X+,Y- quadrant. But then 0 doesn't move.


Same here.

On 8/19/2013 14:05, Bob La Londe wrote:

I use back right for x0 y0. Start at right side, climb milling shoots
chips to back of machine.


--
Steve Walker
(remove brain when replying)

On 8/22/2013 20:43, Steve Walker wrote:
On 8/19/2013 14:05, Bob La Londe wrote:

I use back right for x0 y0. Start at right side, climb milling shoots
chips to back of machine.




Should say right side front.


--
Steve Walker
(remove brain when replying)