I cannot for the life of me get the BLTouch to work with this firmware (1.0.2). i am running a Folgertech FT-5 with MKS 1.4 board. i have tried every possible combination of stuff. i loaded a copy of Marlin FW for the BLTouch and it worked fine.

I can get the probe to manually deploy and retract. when i home Z it doesnt deploy and i have to stop the printer so the bed doesnt crash into the head.

i have attached my config.h

PLEASE HELP!!

[youtu.be]

Here is a video. You can see I can manually drop and raise the pin but Z homing doesn't work. The pin never drops

Also, you can hear a change in speed from slow too fast when the bed starts to raise. Why is this?

why do you have
#define Z_HOME_DIR 1

this is home z to max

your endstop/probe may be at the top of travel, but it still a min endstop

I also suspect the following is backwards
#define INVERT_Z_DIR 1

so you have told the firmware to go to max endstop on Z, changed the direction so it moves toward min endstop, while the firmware knows nothing of the probe on z max, so it doesn't deploy anything. The probe is on z min


change
#define Z_HOME_DIR 1 to #define Z_HOME_DIR -1
#define INVERT_Z_DIR 1 to #define INVERT_Z_DIR 0

Also
You have #define Z_PROBE_HEIGHT -1.5
this would be ok in marlin firmware but in repetier firmware this should be a + value

#define Z_PROBE_HEIGHT 1.5
you can change this in eeprom so no need to re upload firmware.

Forgot to post but I fixed it shortly after I posted the question

and how did you solve it?