RF 45 homing issue

Hello 
It is my first time converting a mill and I am having a problem with homing sequence. I short I can't make it work.
I read this linuxcnc.org/docs/html/config/ini-homing.html  and some similar  topics  here in the forum, and after all I am more confused :).
I use same input for home and limit switch  on all axes .
 
You see in the where are the switches:  


What I want to do is when lets say homing Z - goes to the switch trips it, returns slowly trips it again and then moves 10mm down. Ini file is attached check it and tell me what I am doing wrong.
Thank you. 

It go up fast click returns slow click and goes above the switch.

Ok so this is the current state of the ini file
AXIS_Z]
MAX_VELOCITY = 75.0
MAX_ACCELERATION = 700.0
MIN_LIMIT = -400
MAX_LIMIT = 0.00

[JOINT_2]
TYPE = LINEAR
HOME = 400.0
FERROR = 10.0
MIN_FERROR = 1.0
MAX_VELOCITY = 75.0
MAX_ACCELERATION = 700.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 93.75
STEPGEN_MAXACCEL = 875.00
P = 985.221674877
I = 0.0
D = 0.0
FF0 = 0.0
FF1 = 1.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 0.0
# these are in nanoseconds
DIRSETUP = 10000
DIRHOLD = 10000
STEPLEN = 5000
STEPSPACE = 5000
STEP_SCALE = 320.0
MIN_LIMIT = -400.00
MAX_LIMIT = 0.00
HOME_OFFSET = 395.000000
HOME_SEARCH_VEL = 1.000000
HOME_LATCH_VEL = 0.500000
HOME_FINAL_VEL = 0.00
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0
 When I open the Linux cnc it start like that: 
 

When up jog up:
 
Same thing with homing : It go up fast click returns slow click and goes above the switch. 

Is there any other link except this   linuxcnc.org/docs/html/config/ini-homing.html   one where I can read about the homing routine. And other then this linuxcnc.org/docs/html/user/user-concept...chine-configurations for machine configuration. 

 

 

Your first link is all you need.
The chapter on ini configuration may be slightly useful too.
Note that Home switches must stay triggered to end of travel. Are yours doing this?