Homing error with Z probe

btmerz

Hello,
after I had to install a new arduino mega, I also installed the newest firmware (1.0.1). I adjusted my setting according to my settings for the older dev. version.

But now I have a problem with the homing procedure with my Z-probe (inductive sensor).
Here my homing configuration:

#define HOMING_ORDER HOME_ORDER_XYTZ

#define ZHOME_PRE_RAISE 2

#define ZHOME_PRE_RAISE_DISTANCE 5

#define RAISE_Z_ON_TOOLCHANGE 0

#define ZHOME_MIN_TEMPERATURE 0

#define ZHOME_HEAT_ALL 1

#define ZHOME_HEAT_HEIGHT 20

#define ZHOME_X_POS 110

#define ZHOME_Y_POS 110

When I home the Z axis the printer first homes X than Y. Then the sensor is moved to the position 110/110. Then it moves Z up 5mm and then down in Z to detect the bed.
When the sensor detects the bed and moves up 2mm to detect it again.

So far so good.
But then the nozzle is moved to position 110/110 and the Z axis moves down directly into the bed. The sensor signal is ignored and I get a head crash.

What have I done wrong?

My complete configuration file is in the attachment.

Thanks in advance for your help.
Bernd Merz

MartinH

<blockquote class="Quote">But then the nozzle is moved to position 110/110 and the Z axis moves down directly into the bed. The sensor signal is ignored and I get a head crash.

This is as it should be, after the nozzle is moved to its correct x y coords, it is then lowered to Z0, if it is trying to move below the bed, check in eeprom what value you have set for Z_probe_height (this is the distance from bed to nozzle when the probe is triggered).