Re: CNC - Positive Quadrant

[Jim <alarminex@xxxxxxx>]

On Monday, August 19, 2013 2:01:04 PM UTC-4, Bob La Londe wrote:
> I have noticed that quite a lot of people position parts in CAM in the po=
sitive quadrant of the Cartesian plane. It makes a lot of calculation and p=
lanning easy so it makes sense. When you place a vise square on the table t=
he moving jaw to accommodate different size stock is in the negative direct=
ion usually. This requires touching off and relocating ZERO for Y a require=
ment for every single job or part of a job after rotating a part. Even thos=
e 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 moveab=
le 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 afte=
r you have done all your calculations, layout, and planning. (FYI: I tend t=
o work with XY ZERO in the center of my stock because I do a lot of rotatio=
ns around an axis and/or symmetrical work, then I move my work to the posit=
ive 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 typ=
es 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.

Well, ummm ahhhh uhuh, yep ..... seems obvious to me  ..... how bout you gu=
ys?