MCSi-44/84
Digital Brushless AC servo drive system - Ref.0707
On the other hand, when adjusting it, proceed as follows:
Verify that desired velocity or current command is selected. To do this,
make sure that all the parameters involved (such as SP45, etc.) are
properly set.
When using external analog command, verify that it is output to the proper
pins.
Use parameter CP20 to set the maximum peak current value of the drive
to obtain the best dynamic response.
Set the velocity PI gain using parameter SP1 (proportional gain K) and SP2
(integral K) until the desired system performance is obtained.
Adjust the velocity offset using parameter SP30.
Send a 0 V velocity command to the drive (jumpering pins 1, 2 and 19 of
connector X3).
Measure the motor speed and adjust the offset using parameter SP30 until
the motor stops. Be careful because this method only eliminates the offset
of the drive. The CNC may have an offset of its own which must be adjusted
at the CNC.
In order to adjust the offset for the whole control loop:
Set the CNC in DRO mode keeping the Drive_Enable and Speed_Enable
signals active.
Change parameter SP30 until the motor stops.
WinDDSSetup
It is a Fagor application for PC. The operator can use the application's interface
to read, modify, save to a PC file and download from a PC file all the
parameters and variables of the drive and check the status of the motor-drive
combination; thus making the final adjustment of the servo drive system
easier, faster and more comfortable. This also makes it easier to manufacture
many machines that have MCS Innova units.
When installing the WinDDSSetup, the USB drives are also installed. These
drivers generate an additional virtual COM port to those already used by the
PC and it will only be present when the unit is connected and is applied control
or power voltage. This is why, the unit should be connected first and then run
WinDDSSetup.
Note:
When using an analog command, set parameters SP20 and SP21
properly to obtain the desired response to the velocity command entered.
Note:
Another method would consist in setting an axis position with the CNC
and adjusting parameter SP30 until the following error (axis lag) is
symmetrical.
