Hello Guest it is April 16, 2021, 03:00:00 AM

### Author Topic: End limit switches and homing switches (Mach3, G540, CNC converted X2 mill)  (Read 14737 times)

0 Members and 1 Guest are viewing this topic.

#### Hood

• 25,838
• Carnoustie, Scotland
##### Re: End limit switches and homing switches (Mach3, G540, CNC converted X2 mill)
« Reply #10 on: January 06, 2013, 08:08:26 AM »
Just thought I better post again as I may have confused you regards the Z.
When I said green blob represents X Y Z 0 in machine coords I was actually meaning the way the mill is in the pic. Ie Z fully up is Z Zero in machine coords and when you move it down that is negative values.

Hope I am not making things worse
Hood

#### Mike1000

• 25
##### Re: End limit switches and homing switches (Mach3, G540, CNC converted X2 mill)
« Reply #11 on: January 06, 2013, 08:14:04 AM »
Hi. I thought that Z was increasing (becoming more positive) when you cut?

#### Hood

• 25,838
• Carnoustie, Scotland
##### Re: End limit switches and homing switches (Mach3, G540, CNC converted X2 mill)
« Reply #12 on: January 06, 2013, 08:30:17 AM »
In machine coords Z fully up is normally Zero and thus all moves down are negative.
In Work offset coords the top of material is normally set as Z Zero and thus moving up will be positive numbers and moving down into the work will be negative numbers.
I am probably confusing matters for you as I am talking two different coordinate systems, ie machine coords and work offset coords.
Hood

#### Mike1000

• 25
##### Re: End limit switches and homing switches (Mach3, G540, CNC converted X2 mill)
« Reply #13 on: January 06, 2013, 08:34:11 AM »
No I think this exercise is very good! I will remember it now. Cutting makes Z more negative. I just will learn that. Thanks again!