THORLABS DDS300 User Manual page 22

DDS300 Direct Drive Translation Stage
4) Adjust the PID settings to fine tune the control loop for your application. Refer to the
handbook supplied with the BBD301 control unit for more information.
Caution
Default PID values for 2 kg load placed at the centre of the top plate have already been
optimized and stored within the stage, and these are loaded into the controller on
power up.
If problems are encountered (e.g. stability of the closed loop position control, lost motion or
incomplete moves) the position PID parameters can be adjusted to tune the stage for the given
application. Normally, only minor adjustment of the Proportional, Integral and Derivative
parameters should be necessary, and some trial and error will be required before the ideal
settings for a specific application are achieved.
Load Proportional
0-2 kg 800
4 kg 1000
6 kg 1000
8 kg 1150
10 kg 1150
5) After the parameter changes have been performed, click the 'Persist Settings to
Hardware' box, then click 'OK'. This will ensure that the same parameter settings will be
loaded next time the unit is powered up - even in the absence of a PC.
Caution
If settings are persisted, then a stage is changed, further parameter adjustment may
be required to achieve optimum performance with the new stage.
Page 20
Table 1.1 Suggested PID Parameters
Integral Derivative
1000 720
1000 800
1150 855
1150 1000
1500 1000
Integral Output
Limit Gain
17000 2050
17000 2300
17000 2300
18000 2400
18000 2400
ETN013636-D02
Derivative
Recalibration
Time
5
6
6
7
7