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4.3 Easy Use function
The Easy Use function helps users setup the CMMB motor controller for the main types of applications in a
very short time. The LED panel guides the userstep by step through the settings of the few most important
parameters in order to prepare the controller for the desired application. The servo control loops of the
motor controller are pre-configured to useful default settings which are adequate for many applications at as
they are. A robust auto-tuning function can be used additionally to identify the applied mechanical system
more precisely. After that, the user only needs to adjust the controller’s servo performance with the stiffness
parameter.
4.3.1 Setup process with Easy Use function
The process for setting up the CMMB motor controller with the Easy Use function follows a simple procedure.
Step 1: The parameters of the EASY panel menu have to be accessed and confirmed, or set one by one. The
auto-recognized motor type can be confirmed, the control interface has to be selected, interface-related
main parameters have to be set and the mechanical- and control-application types must be chosen.
Afterwards, these parameters have to be saved and the controller has to be rebooted. As a result of these
settings the controller is configured for a suitable I/O setting and the servo control loop parameters are set
to matching defaults. The controller is ready for use for a wide range of standard applications and can be
tested.
Step 2: If the servo control performance of the controller has to be further improved, the tunE panel menu
must be accessed. With the help of the functions in this menu, the controller can start an auto-tuning motor
run in order to identify motor load conditions and to measure the inertia. After that the controller calculates
the inertia ratio, which is the ratio of the measured inertia and the motor inertia. Depending on the obtained
inertia ratio the controller defines a suitable stiffness value for the servo behavior. Using the inertia ratio and
the stiffness value the controller tunes the servo loops automatically.
Step 3: Inside the tunE menu the stiffness can be adjusted up/down simply by panel buttons. The stiffness
adjustment can be done also during the testing of the application, while the controller is being commanded
via the selected command interface. After finding the best value for stiffness the tunE parameters need to be
saved and the controller is finally ready for use. If the adjustment of the stiffness does not result in the
required performance, the PC software “CMMB configurator” can be used to for further optimisation.
START
Execute the flow chart of EASY
Jog the machine,
evaluate the performance
Measure the Inertia
Ratio by Tn03
Adjust the
Stiffness by Tn01
Jog the Machine,
evaluate the performance
END
Adjust Gain by PC
Not good
Good
Not Good
Can not figure out by
adjusting the stiffness
Good
Figure 4-2: Flow chart of the Easy Use function