How do i Model the MID 7654

[DuncW]

I am trying to produce a simulink model in Matlab of my force control system ( A servo motor , connected to the MID 7654, which is connected to the NI 7344 flex motion board, A force sensor connected to ADC-1 closes the loop). In order to complete the system transfer function i need to know what output voltage is being applied across the servo motor as it is this (if my understanding is correct) , which determines the current through the motor, the growth rate of which is goverend by the motor inductance. I know the NI 7344 outputs a signal between +/-10V, how is this acted upon by the MID7645??, the only onfo given in the manual is a current output, surely there must be an accompanying gain applied to the voltage which is then applied to the mot
or which then detemines the current running through the sytem. Any help which could help me better understand the system and produce a model would be much appreciated !.

[Bates]

There is no "characteristic" transfer function for our MID motor controller. That transfer function is going to be the result of the MID in combination with the motor that you are using. The output of the MID is going to be in current. That current is going to be related the current that you select with the MID's jumpers, and the voltage input that the MID receives from the Motion Control Board. This output is characterized by two charts that you can find in the MID's user manual.
MID's user manual

That current output plus the characteristics of your motor should allow you to calculate the relevant transfer function.