Question on page 170 of Assembly Manual

[Eaglezsoar]

A user left a question about this page and after looking at it I have to wonder if there is a typo or is it just me not understanding - again.

This is the section in question:

Perform the same check on the other axes by issuing G28 followed by G0 Z5 X77.94 Y-45
F3500 and G0 Z5 X-77.94 Y-45 F3500

Is there supposed to be a dash between the X and the 77.94 in the first line?
I apologize if this question seems dumb but I am trying to understand the why, ifs and whatfors.

[geneb]

No. The "dash" is a literal minus sign.

Try it and you'll see exactly what it does.

g.

[Eaglezsoar]

Thanks Gene, I have a lot to learn especially in the programming arena. I have never heard of a literal minus sign so I Googled it and stuff came up that I could not hope to understand.
I'll take the easy way, Gene says it works then it works.

[geneb]

X nn.nn moves the X axis as a positive offset from the X axis zero point. X -nn.nn moves the X axis as a negative offset from the X axis zero point.

You don't see this in cartesian machines because 0,0 is the corner of the bed, not the center of it.

g.