Test LinuxCNC without motors and encoders connected

Peterdeleu wrote: And what does this mean in my situation?
This is indeed the WCS in Fusion.
If I use this WCS, and I position the workpiece against the stop on the Biesse (left-rear), what will happen?.

You can place the WCS anywhere in Fusion.
And then you can place the LinuxCNC G-code origin anywhere on the bed in LinuxCNC.

It's really a non-issue.

I very often place my WCS on a hole in Fusion and then probe that hole on the machine, make that my origin, and continue the part, for example.

The LinuxCNC G-code X=0, Y=0, Z=0 can be anywhere inside (or even outside) the machine envelope. It is offset from the absolute position, but you never use that.

I'll tried to simulate the WCS problem, and it looks like this is indeed a non-issue.

But I have another problem (again )
During the execution of a program, the "Preview" stops showing movements at the begin of each line. Everything is "shocking".
It looks like the preview is only refreshed after an instruction is completed. The strange thing is.. when I make small movements with the mouse (left button pressed) over the preview, then the preview is ok.
Is this something that I can solve, or is this normal?
Something to do with the fact that there are no servo's and encoders are connected yet? (FERROR and MIN_FERROR = 1000)

I am not sure what you are describing, but it does not sound normal.

The graphical preview uses OpenGL and sometimes that can be a bit funny without the right graphics drivers installed.
Is this onboard video or an add-in card?

Sorry for my late respons, but I was away for a few days.

I'm using the onboard graphic card.
The motherboard is a M2NPV-VM ASUS
And it is a - NVIDIAR GeForce 6150 + nForce 430

I'll try to explain the behavior..
LinuxCNC is working normal.
The G-code instructions are scrolling like it should be.
Only when there's a G-code witch requires a long movement of the axes, the preview shows only the movement when the movement is done. I mean, when for example the X-axis needs to move 100mm, I can only see in the preview the result of the movement when the move is complete. So the preview "shocks". I should expect that the preview shows the movement while the X-axis is moving, and not only when it is completed.
But when I move the cursor above the preview (with the left mouse button pressed, so move the image in the preview box) I see the tool moving in the preview).

This goes against some of what you might have read on the Wiki (but a lot of that is outdated). I would be tempted to try the on-board graphics and see if that works better. It will, at least, save some space and power .

Maybe I was not clear (English is not my native language )

I'm using the onboard graphic. There's no the video card installed.