机床产品/Machine Tool Products
–
22/220 Series Controller Application Manual
Quad-Peak Compensation–45
•
•
•
•
•
•
10 Quad-Peak Compensation
10.1 Preface
At the moment of axis movement start or switch direction, there's fiction in mechanical structure can cause
movement delay. And the delay creates texture on surface witharc path orArc-to-straight path are executed, which
lower the surface finish quality.
Ballbar calibration is generally used to measure the scale of delay, sharp peaks can be found at borders of four
quadrants (0/90/180/270 degree). This phenomena can be called as Quad-Peak.
The best solution to eliminate quad-peak is to increase servorigidity to enhance servo system's resistance to
friction delay.Avoid to use controller compensation if not necessary.
Comparing to the clear amount of pitch or backlash error, friction caused quad-back error can not be measured and
compensatedaccurately.
10.2 Specifications
Syntec Controller provides three types of quad-peak compensations: Position Peak, Speed Peak,Torque
Peak.
Position Peak is the old quad-peak compensation function, and its name changed to position peak
compensation.
Speed Peak andTorque Peak provides new compensation function after 10.118.22, and it can only be
enabled in the build-In Ballbar tuning screen.
Speed Peak has 0-5 sets of parameters, set 1-5 can adjust RF during tuning, and set 0 has no RF setting.
When using Speed Peak compensation, parameter set 0 is only used when set 1-5 are all R=0 and F=0.
All types of compensation sends additional command by controller, the mechanism of each type is
described below.
10.2.1 Position Peak Compensation Description
Position peak compensation is to send out additional position command at the moment of direction change to
shorten the delay caused by friction, therefore improve machining precision (as shown below).
The additional command amount sent during first hold time (Pr146x) equals to the parameter values (Pr136x,
Pr144x); the command amuont of second hold time (Pr138x) is calculated based on motor feedback.
To use the built-in electrical ballbar function, please refer toBallbar Tuning.
To Next Page
Loading...
Need help?
General