How do I tell Smoothie controller to increase the size on my Y axis?

My (K40 variant) laser has nearly 11 inches of Y Axis but I am not able to figure out how to tell the controller. It always stops a couple of inches shy of the actual Origin point. So, I end up with around 8 inches of Y space. Thank you.

You might need to adjust the ‘beta_max’ value in your Smoothieware configuration. You can find more information on this here: