Problem with new screen set up

[angelkarla]

Hi I am confused with z setting in Mach 3
I have installed big tex blue screen set as per his video. Touch of plates work fine and zero ok, Z returns to within 1/2" of top switch.
No problem so far.
Run program which completes absolutely fine.
Parking x and Y set ok.
When I hit park z axis rises to hit limit switch .
Any ideas as to why would be appreciated.
Should the tool change position in settings be a plus .5 or a minus .5
Or am i missing something.

[TReischl]

The park position in Z should more than likely be a minus value. I use Ger21's screenset which is based on Tex's. If you think about it for a minute, or 20 seconds, the value must be minus because the limit switch is 0, any location below that is negative in machine coords.

[angelkarla]

TReischl Hi Thanks once again for your help, sorted
I put -.5 instead of +.5 all works ok Great screen
Have ordered a cross hair laser also.
Many thanks once again keep posting I learn so much. Thank you vectric.

[zeeway]

I am a user and a big fan of the Big Tex Blue Screen as well. I also use a cross hair laser. The cross hair laser helps with setting x and y zero, but keep it mind that those laser lines still have a thickness from 5 to 10 thousandths. So, if you are trying to match an exact point, you will have to set it to the center of the laser line.

Angie