axis issues < probably me!

HI guys, im still trying to get my gravograph working with linux cnc, all the steppers are working and i have got movement but im doing something wrong but cant put my finger on iit.
the y axis homes fine and steps back 10mm as set up, i can them zero it and start a program but the test linuxCNC file is upside down, left to right is fine but the letters are inverted.
Looking from the top of the machine, when it homes the bed moves towards me and the x axis head moves to the left, so it homes to the top left of the bed.



now im not sure the best way to set up the step config.
at present i have tried the following combinations

home location -20 or 20
table travel 0 to 350, 0 to -350 , 350 to 0
home switch location 0
home search velocity -10 or +10
as it moves from front to back in the y axis i thought its should be 0 to -350

but its getting confusing, i got it to follow the path correctly using
-20
0 to 350

0
-10
but if i tried joggin in the positive direction it only moves 20mm
not getting my head round this, its probably such a simple fix as well.
sorry to be such a noob on this.

it's usual to have the zero point at the front left corner , you have it at the rear left i believe , all movements once you set zero are in the positive direction , you'll probably find you have the y axis reversed

Thanks Big JT, that's all, working fine.
Now to just get the z axis moving when running g code.
follows the path but doesn't move in either direction following a program , but works fine when jogged.
Could be the Inkscape Gcode not set up properly, but that's another thing for another afternoon.