Technosoft iPOS360x MX, Technical Reference, Page: 101 / 116


Technosoft 2013 89 iPOS360x MX Technical Reference
2
Pole_Pitch
Load_Acceleration[SI] = ×Motor_Acceleration[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])
6.3.3. 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 expre
ssed 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. 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: