Moving from Marlin to Smoothie

I have a home made core xy printer and I am reading about smoothie, I do not see where in smoothie we indicate the dimensions of the bed is it for each axis
alpha_max, alpha_min etc …

Hey.

This might help: from-marlin [Smoothieware] and endstops [Smoothieware]
I’m a bit confused, you mention alpha_max so you know about these, so what exactly are you asking?

Cheers.

In Marlin 1.9 the dimensions of the bed are fixed as follows:
// The size of the print bed
#define X_BED_SIZE 200
#define Y_BED_SIZE 200
// Travel limits
#define X_MAX_POS X_BED_SIZE
#define Y_MAX_POS Y_BED_SIZE
#define Z_MAX_POS 200

In smoothie as well?
alpha_max 200
beta_max 200
gamma_max 200

Yes, but it’s not exactly as simple as that. Smoothie lets you fine-tune things a lot more, and the concepts are a little bit different. You really need to read the endstops page, and depending on exactly what you want to do, apply what’s explained there. If you have specific questions don’t hesitate to ask, the main idea here being: what are you defining the bed dimensions for ?