moving problem

Just to be clear BOTH joints on the gantry
HAVE to have -1 ie. not just one of them.

If any joint has a negative HOME_SEQUENCE
value, then all joints with the same absolute
value (positive or negative) of the HOME_SEQUENCE
item value will synchronize the final move.

In 2.8 and 2.9 with tandem homing, do not
jog the machine before homing as it will be in
joint mode so Y1 in your case will jog with
pgup/pgdown buttons, insead of Z axis, causing the
gatry to bend.

Joint mode jogging of joints having a negative
HOME_SEQUENCE is disallowed. In common gantry
applications, such jogging can lead to
misalignment (racking). Note that conventional
jogging in world coordinates is always available
once a machine is homed.

RoberCNC wrote:

so with what you say and if I have drawn a correct conclusion from what I am reading it is as simple as adding the "Home_sequence" section within each of the joints in the INI file of the configuration created with the Y tandem and the two assigned to the duplicated axis put -1 which will create me the Home all axis button, will move both simultaneously, and will give me an interface with XYZ after the cycle, the only thing that forces me to always start the machine with Homing.

[KINS]
KINEMATICS              = trivkins coordinates=xyyz
JOINTS                  = 4