ADLINK PCI-8134A - Manual (Page 51)

Operations
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The axis with larger numbers of moving pulses is the main axis, and the
other axis is the secondary axis. When both axes are set at the same
amount of pulses, the ‘X’ or ‘Z’ is the main axis. The speed relation
between main and secondary axes is as follows:
Composite Speed = Speed of main axis x
Relative Functions:
move_xy(), move_zu(),Refer to section 6.9
set_move_speed(), set_move_accel(),set_move_ratio(): Refer to section
6.10
4.1.6 Home Return Mode
In this mode, you can let the PCI-8134/PCI-8134A output pulses until the
conditions to complete the home return is satisfied after writing the
home_move() command. Finish of home return can be checked by
motion_done() function. Or you can check finish of home return
accompanied with the interrupt function by setting bit 5 of int_factor to 1 in
set_int_factor() function.
Moving direction of motors in this mode is determined by the sign of velocity
parameter in home_move() function. A v_stop() command during returning
home can stop OUT and DIR from outputting pulses.
Before writing home_move() command, configuration must be set by
set_home_config() function. . See also Section 4.3.3 for further
description. There are total three home return modes can be selected by