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General Mach Discussion / Re: z axis moving up
« on: June 03, 2012, 10:00:06 PM »
Hello,
I'm new to the site and to CNC. I am using Mach 3 demo just getting my machine to run so I can start learning. I have a question that kind of relates to this topic. I need to know how to changes the Z movement + -. Just got the machine running this afternoon for the first time and the Z axis moves down when I jog Z+. The roadrunner demo Gcode has the Z set up just the opposite so when it starts the code the bit comes up when it should be going down. Do I have to changes all the Gcode lines for Z or is there a + - reversal somewhere. I can't find it.
I'm new to the site and to CNC. I am using Mach 3 demo just getting my machine to run so I can start learning. I have a question that kind of relates to this topic. I need to know how to changes the Z movement + -. Just got the machine running this afternoon for the first time and the Z axis moves down when I jog Z+. The roadrunner demo Gcode has the Z set up just the opposite so when it starts the code the bit comes up when it should be going down. Do I have to changes all the Gcode lines for Z or is there a + - reversal somewhere. I can't find it.