Auto-Squaring with LinuxCNC v 2.8

[Clive S]

4) If you only have 3 sets of homing switches, one for each axis, you will now need to install a fourth set to give separate inputs for the two sides of your relevant axis (X in my case).

It might be worth pointing out that the homing sequence in Lcnc is defined in the ini file under each axis as in this example:-

This is a sample from a working ini file of one axis. (in linuxcnc 2.8 there are (axis) and (joints) read joints as a motor as an axis can have more that one motor.

[AXIS_1]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 33.2502660021
MAX_ACCELERATION = 1000.0
STEPGEN_MAXACCEL = 1250.0
SCALE = 320.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -0.001
MAX_LIMIT = 200.0
HOME_OFFSET = 0.000000
HOME_SEARCH_VEL = -10.000000
HOME_LATCH_VEL = 1.562500
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 2

by changing the sequence you change the number that the axis will home ie 0 will home first then 1 will home next etc you can also home two or more together by using the same number. WITH dual homing ie gantry the numbers have to be both -ve ie say -2