Mitsubishi A1SD75P1-S3, User Manual

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12 - 75
MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
12.6.6 Stepping motor mode function
The "stepping motor mode function" is used to carry out the settings when controlling a
stepping motor with the AD75. By setting the "stepping motor mode function", "step out
prevention during acceleration/deceleration", "reduction of mechanical vibration due to
decreases in frequency fluctuations", etc., will be carried out, and control of the
stepping motor with the AD75 will be enabled.
The details shown below explain about the "stepping motor mode function".
(1) Precautions during control
(2) Setting the stepping motor mode function
(1) Precautions during control
Control the axis set to the stepping motor control mode within the following
restrictions.
(a) Restrictions on position command range and speed command
range
In the stepping motor mode, the position command range and speed
command range are 1/16 of those in standard motors.
When using the stepping motor mode, carry out control within the setting
range of the mode.
(b) Circular interpolation control use is not possible
Circular interpolation cannot be designated in the stepping motor mode.
(Circular interpolation control is also not possible when using a servomotor
in the stepping motor mode.)
An error "control method setting error" (error code: 524) will occur if circular
interpolation is started when the stepping motor mode is set.
(c) S-curve acceleration/deceleration use is not possible
"S-curve acceleration/deceleration" cannot be carried out in the stepping
motor mode. Step out may occur if this is used.
(d) Restrictions on linear interpolation control
Use the linear interpolation control with both axes set to the standard mode
or the stepping motor mode.
Control at the command speed is not possible when the stepping motor
mode and the standard mode are used in combination in linear interpolation
control.
When carrying out linear interpolation control of a stepping motor and
servomotor, set both axes to the stepping motor mode.
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