Technosoft PIM2401, Technical Reference

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Technosoft 2007 66 PIM2401 Technical Reference
For linear motors:
Pole_Pitch
Load_Speed[SI] = ×Motor_Speed[IU]
resolution×Tr ×T
where:
resolution – is the motor position resolution
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”
Pole_Pitch – is the magnetic pole pitch NN (distance expressed in [m])
6.2.3. DC brushed motor with quadrature encoder on load and tacho on motor
The internal speed units are encoder counts / (slow loop sampling period). The motor is rotary
and the transmission is rotary-to-rotary. The correspondence with the load speed in SI units is:
] IU [ Speed _ Load
T lines _ encoder _ No
] SI [ Speed _ Load
×
× ×
π ×
=
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”
6.2.4. DC brushed motor with tacho on motor
When only a tachometer is mounted on the motor shaft, the internal speed units are A/D
converter bits. The correspondence with the load
speed in SI units
1
is:
] IU [ Speed _ Motor
Tr gain _ Tacho
Range _ Input _ ue log Ana
] SI [ Speed _ 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]
6.2.5. Stepper motor open-loop control. No feedback device
The internal speed units are motor µsteps / (slow loop sampling period). The correspondence with
the load
speed in SI units
is:
1
SI units for speed are [rad/s] for a rotary movement, [m/s] for a linear movement