Can a machine be setup with one axis?

The base thread does the fast ND stuff, like output step pulses, but typically does not do any difficult mathematics (no floating point)
The servo thread does the complicated stuff, like calculating the step frequency for the next 1mS, before passing that number on to the base thread.

Leon82 wrote:

Here's a silly question,
How do I make a text file a program?

There are two questions that you could be asking here.

1) How do I make a text file containing Pyhon, Bash, Java etc into an executable file.
- Then you need the file to start with the #! sequence and the path to the interpreter
For example #! /usr/bin/python
And you also need to give the file execute permissions "chmod +x file.name"

2) How do I get LinuxCNC to treat a text file containing G-code as .G-code:
- Change the file extension to .ngc
Or edit the INI to accept the other extension as G-code.

but it has what seem to be image file extension. Png... Ect

Three! There are at least three questions you could be asking

3) To interpret a bitmap image (.png, .gif, .jpg) as a depth map simply open it in the LinuxCNC GUI file browser, the special filter file "Image-to-gcode" will run and convert the image to a machinable file.