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For linear motors:
where:
No_encoder_lines – is the rotary encoder number of lines per revolution
Encoder_accuracy – is the linear encoder accuracy i.e. distance in [m] between 2 pulses
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"
6.13.2. DC brushed motor with quadrature encoder on load and tacho on motor
The internal motor speed units are A/D converter bits. The correspondence with the motor speed
1
is:
in SI units
Motor
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]
6.13.3. DC brushed motor with tacho on motor
The internal motor speed units are A/D converter bits. The correspondence with the motor speed
in SI units is:
Motor
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]
6.13.4. Stepper motor open-loop control. No feedback device or incremental
encoder on load
The internal motor speed units are motor µsteps / (slow loop sampling period). The
correspondence with the motor speed in SI units
47
SI units for motor speed are [rad/s] for a rotary motor, [m/s] for a linear motor
© Technosoft 2011
=
Motor
_
Speed
[
SI
]
Ana
log
ue
=
_
Speed
[
SI
]
4096
Ana
log
ue
=
_
Speed
[
SI
]
4096
Encoder
_
accuracy
×
T
_
Input
_
Range
×
Motor
×
Tacho
_
gain
_
Input
_
Range
×
Motor
×
Tacho
_
gain
47
is:
90
Motor
_
Speed
[
IU
]
_
Speed
[
IU
]
_
Speed
[
IU
]
IDMx40 Technical Reference
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