IAI America PDR-101-MW - Manual (Page 55)

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Calculation formula for stroke pulse value
In the case of linear axis:
(mm/rev) length lead screw Ball
) (pulse/rev pulses encoder of Number x (mm) value Stroke
(pulse) value Setting =
In the case of rotational axis:
rate reduction gear axis Rotational x (deg/rev) 360
) (pulse/rev pulses encoder of Number x (deg) value Stroke
(pulse) value Setting =
z
The software stroke limit is set differently according to the setting of homing pattern code (motor
revolution direction at homing), a position control information parameter. For example, in the case of
an actuator with a stroke of 100 (mm), a lead of 10 (mm) and a number of encoder pulses of 16384
(pulse), the stroke pulse value is calculated as follows:
(pulses) 163840
(mm/rev) 10
) (pulse/rev 16384 x (mm) 100
(mm/rev) length lead screw Ball
) (pulse/rev pulses encoder of Number x (mm) value Stroke
(pulse) value pulse Stroke
= =
=
The limits are set as follows:
a. If the setting of homing pattern code is “1” (the motor revolution direction is forward at homing), LIMM
is set to 0 (pulse) and LIML is set to -163840 (pulse).
b. If the setting of homing pattern code is “0” (the motor revolution direction is reverse at homing), LIMM
is set to 163840 (pulse) and LIML is set to 0 (pulse).
For this reason, it is necessary to change these parameters as well if the homing pattern code parameter is
to be changed.
Note, however, that the values of LIML and LIMM are automatically rewritten when the homing pattern code
is changed if the display unit is set to “Millimeter (mm)” and the coordinate plus process display is set to
“Display” in the environment setting of the PC software.
Caution