Technosoft iPOS4808 MX Series, Technical Reference

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Technosoft 2014 98 iPOS4808 MX Technical Reference
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”
6.3.4. Step 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 is:
] IU [ on Accelerati _ Motor
T Tr steps _ No steps _ No
] SI [ on Accelerati _ Load

   
 

2
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
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”
6.3.5. Step motor open-loop control. Incremental encoder on load
The internal acceleration units are load encoder counts / (slow loop sampling period)
2
. The
correspondence with the load acceleration in SI units is:
For rotary-to-rotary transmission:
] IU [ on Accelerati _ Load
T lines _ encoder _ No
] SI [ on Accelerati _ Load

 
 

2
4
2
For rotary-to-linear transmission:
] IU [ on Accelerati _ Load
T
accuracy _ Encoder
] s / m [ on Accelerati _ Load
 
2
2
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
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”.
6.3.6. Step motor closed-loop control. Incremental encoder on motor
The internal acceleration units are motor encoder counts / (slow loop sampling period)
2
. The
transmission is rotary-to-rotary. The correspondence with the load acceleration in SI units is: