Technosoft IDM240-5EI - DC Brushed Motor with Quadrature Encoder on Load and Tacho on Motor; DC Brushed Motor with Tacho on Motor; Stepper Motor Open-Loop Control. no Feedback Device

© Technosoft 2011 82 IDMx40 Technical Reference
Tr – transmission ratio between the motor displacement in SI units and load displacement
in SI units
T – is the slow loop sampling period expressed in [s]. You can read this value in the
“Advanced” dialogue, which can be opened from the “Drive Setup”
6.3.2. DC brushed motor with quadrature encoder on load and tacho on motor
The internal acceleration units are encoder counts / (slow loop sampling period)
2
. The motor is
rotary and the transmission is rotary-to-rotary. The correspondence with the load acceleration in
SI units is:
]IU[onAccelerati_Load
Tlines_encoder_No
]SI[onAccelerati_Load ×
××
π×
=
2
4
2
where:
No_encoder_lines – is the encoder number of lines per revolution
T – is the slow loop sampling period expressed in [s]. You can read this value in the
“Advanced” dialogue, which can be opened from the “Drive Setup”
6.3.3. DC brushed motor with tacho on motor
When only a tachometer is mounted on the motor shaft, the internal acceleration units are A/D
converter bits / (slow loop sampling period). The correspondence with the load acceleration in SI
units is:
]IU[onAccelerati_Motor
TTrgain_Tacho
Range_Input_uelogAna
]SI[onAccelerati_Load ×
×××
=
4096
where:
Analogue_Input_Range – is the range of the drive analogue input for feedback,
expressed in [V]. You can read this value in the “Drive Info” dialogue, which can be
opened from the “Drive Setup”
Tacho_gain – is the tachometer gain expressed in [V/rad/s]
T – is the slow loop sampling period expressed in [s]. You can read this value in the
“Advanced” dialogue, which can be opened from the “Drive Setup”
Tr – transmission ratio between the motor displacement in SI units and load displacement
in SI units
6.3.4. Stepper motor open-loop control. No feedback device
The internal acceleration units are motor µsteps / (slow loop sampling period)
2
. The
correspondence with the load acceleration in SI units
40
is:
40
SI units for acceleration are [rad/s
2
] for rotary movement, [m/s
2
] for linear movement