Hi all,
I am building a simple control system and wish some help on it.
I have a motor attached to a vise which closes the jaws on a load cell to measure the force. The load cell gives feedback of a maximum of 30mV at full load. The motor is a 12VDC 60W 50rpm motor.
I have three questions:
thank you
I am building a simple control system and wish some help on it.
I have a motor attached to a vise which closes the jaws on a load cell to measure the force. The load cell gives feedback of a maximum of 30mV at full load. The motor is a 12VDC 60W 50rpm motor.
I have three questions:
- do you think it is best to use an H bridge with transistors or mosfets to reverse the motor or just a simple H bridge with switches due to high currents?
- And in the differential opamp for the control system what determines the value of the resistors apart from the amount of gain required? i.e. does the current effect which value to choose for a particular opamp?
- And is there any simple way how to calculate the transfer function of the motor as I do not have and cannot find any data sheet on my type of motor
thank you