After installing Sketchucam all features will work without further setup. However, there are some settings you will want to change to suite your machines size and capabilities.

To make these changes you need to access the "Tools|Phlatboyz|Options|Machine Options" menu item as illustrated at right.

Things you may need to change

Default_safe_width (X)

Set this to the largest workpiece your machine can take in the X direction.

Default_safe_height (Y)

Set this to the largest workpiece Y size.

Default_overhead_gantry

If all you have is a Phlatprinter, set this to false. If all you have is a gantry type machine, set this to true. If you have both styles, set to the one you use the most.

Min_z It is VERY IMPORTANT that you get these settings correct. Do NOT set Min_Z to zero unless you also set Default_tabletop is Z-Zero on the Misc Options dialog to TRUE, and NEVER change it in the parameters dialog. Failing to do this correctly will result in faulty G-code generation.
Min_z = -maxZtravel
Max_z = maxZtravel
are the preferred settings, allowing both 'material top' and 'table top' as Z-zero to work properly.

Set this to negative (-) your Z travel. G-code will never contain negative Z travel more than this figure.

Max_z

Set this to your Z travel. G-code will never contain Z travel more than this figure.

You can read the full help for that dialog here.