Home one axis without reference switch

Hello,

i have a 4 axis setup with a XYZ axis for the motion of the toolhead and a A-axis that is used to drive a reprap-kind of 3D printer extruder. This axis has no reference switch. What is annoying is that when i home all axis i have to seperately home that one in the menu (which just does nothing exept setting the homed parameter in hal to TRUE.
I tried to set the paramter in Hal to 1 per default but its not writable (which makes sense)
How can i achieve that this axis is homed at startup or together with the others? Or if that is not possible what is the HAL command to home an axis so i can put it to a pyvcp button without the need to search it in the menu every time..

thanks in advance

Hi

I don't know how you home the other axes, individually or all at the same time.

Assuming you home them together

HOME_OFFSET = 0.0
HOME_SEARCH_VEL = 0
HOME_LATCH_VEL = 0
HOME_SEQUENCE = 0

will home your A axis at the same time, but not move it at all, just set it as homed.

Adjust the HOME_SEQUENCE number if you want to home it after the other axes are homed etc etc

linuxcnc.org/docs/2.5/html/config/ini_co...d_sub_axis_section_a
linuxcnc.org/docs/2.5/html/config/ini_homing.html

regards