Technosoft IDM240-5EI - Stepper Motor Open-Loop Control. no Feedback Device; Stepper Motor Open-Loop Control. Incremental Encoder on Load; Stepper Motor Closed-Loop Control. Incremental Encoder on Motor; Motor Speed Units

© Technosoft 2011 89 IDMx40 Technical Reference
6.12.3. Stepper motor open-loop control. No feedback device
The internal motor position units are motor µsteps. The correspondence with the motor position
in SI units
45
is:
]IU[Position_Motor
steps_Nosteps_No
]SI[Position_Motor ×
×μ
π×
=
2
where:
No_steps – is the number of motor steps per revolution
No_µsteps – is the number of microsteps per step. You can read/change this value in the
“Drive Setup” dialogue from EasySetUp.
6.12.4. Stepper motor open-loop control. Incremental encoder on load
In open-loop control configurations with incremental encoder on load, the motor position is not
computed.
6.12.5. Stepper motor closed-loop control. Incremental encoder on motor
The internal motor position units are motor encoder counts. The correspondence with the motor
position in SI units is:
]IU[Position_Motor
lines_encoder_No
]SI[Position_Motor ×
×
π×
=
4
2
where:
No_encoder_lines – is the motor encoder number of lines per revolution
6.13. Motor speed units
6.13.1. Brushless / DC brushed motor with quadrature encoder on motor
The internal motor speed units are encoder counts / (slow loop sampling period). The
correspondence with the motor speed in SI units
46
is:
For rotary motors:
]IU[Speed_Motor
Tlines_encoder_No
]SI[Speed_Motor ×
××
π×
=
4
2
45
SI units for motor position are [rad] for a rotary motor, [m] for a linear motor
46
SI units for motor speed are [rad/s] for a rotary motor, [m/s] for a linear motor