firstime in cnc world homing Z question

hi guys , i am beginner to cnc world , when i do homing at axes Z the tools go down , is correct ???
should not go up ????
thankz at all

faustf wrote:

hi guys , i am beginner to cnc world , when i do homing at axes Z the tools go down , is correct ???
should not go up ????
thankz at all

The Z axis on a mil or router generally always goes up going +ve

The HOME_SEARCH_VEL in the ini file is the place to change it .

ie. if say HOME_SEARCH_VEL is 50 and it is going the wrong way just put a - before the 50 like vel -50 This will reverse the direction.

[JOINT_1]
TYPE = LINEAR
HOME = 0.0 This is the final home position
MIN_LIMIT = -0.001
MAX_LIMIT = 1220.0
MAX_VELOCITY = 200.0
MAX_ACCELERATION = 500.0
STEPGEN_MAXACCEL = 625.0
SCALE = 106.666666667
FERROR = 1
MIN_FERROR = .25
HOME_OFFSET = 0.0 This is used to square the gantry (a small number) ie 0.25
HOME_SEARCH_VEL = 0 use this to search for the home switch ( if you change the sign it will reverse the direction) if it is zero it probably won't move
HOME_LATCH_VEL = 0 This number is set to the speed of the search to the switch ( if you change the sign it will reverse the direction)
HOME_USE_INDEX = NO
HOME_SEQUENCE = 0 It is usual to have 0 for the Z axis (so that the Z will lift out of the way first) but for dual homing both axis have to have the same -ve number ie -1

This might help linuxcnc.org/docs/2.8/html/config/ini-homing.html