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

© Technosoft 2011 78 IDMx40 Technical Reference
6.1.3. Stepper motor open-loop control. No feedback device
The internal position units are motor µsteps. The correspondence with the load position in SI
units is:
]IU[Position_Motor
Trsteps_Nosteps_No
]SI[Position_Load ×
××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.
Tr – transmission ratio between the motor displacement in SI units and load displacement
in SI units
6.1.4. Stepper motor closed-loop control. Incremental encoder on motor
The internal position units are motor encoder counts. The correspondence with the load position
in SI units
35
is:
]IU[Position_Motor
Trlines_encoder_No
]SI[Position_Load ×
××
π×
=
4
2
where:
No_encoder_lines – is the motor encoder number of lines per revolution
Tr – transmission ratio between the motor displacement in SI units and load displacement
in SI units
6.1.5. Stepper motor open-loop control. Incremental encoder on load
The internal position units are load encoder counts. The transmission is rotary-to-rotary. The
correspondence with the load position in SI units is:
]IU[Position_Load
lines_encoder_No
]SI[Position_Load ×
×
π×
=
4
2
where:
No_encoder_lines – is the rotary encoder number of lines per revolution
Tr – transmission ratio between the motor displacement in SI units and load displacement
in SI units
35
SI units for position are [rad] for a rotary movement , [m] for a linear movement