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Movement bound question

Posted by povlhp 
Movement bound question
May 18, 2017 11:40PM
I have a GeeeTech MeCreator 2, and have moved settings to 1.1 (will contribute pin-file and configuration for the GT2560)

I have one question, it is sold as a 160x160x160 printer. Old 1.0 firmware said max movement is 175x165x161. Endstops are at MAX X, MAX Y, and MIN Z)

What is th most correct way to set up movement bounds ? Should I just be greedy, and decide to use the full 175x165 ? The bed itself is 180x180mm.
Recommneded home position seems to be back right corner, which people define to (160, 160), thus having a completely unused negative area front left.

So what should I do:

This, which does not really make sense, except homing is at (160, 160)
#define X_MIN_POS -15
#define Y_MIN_POS -5
#define Z_MIN_POS 0
#define X_MAX_POS 160
#define Y_MAX_POS 160
#define Z_MAX_POS 160

Or this, and even let the slicer use the rest ?
#define X_MIN_POS 0
#define Y_MIN_POS 0
#define Z_MIN_POS 0
#define X_MAX_POS 175
#define Y_MAX_POS 165
#define Z_MAX_POS 160 (I have a thicker bed on top, so maybe even lower).

Or should I distribute it a bit more ? And then have auto-home position just outside print area, to have a place to drip.
#define X_MIN_POS -7
#define Y_MIN_POS -2
#define Z_MIN_POS 0
#define X_MAX_POS 168
#define Y_MAX_POS 163
#define Z_MAX_POS 160

Not exactly sure where the real bed center is.
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