Syntec 22/220 Series User Manual

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Quad-Peak Compensation–50
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1.
Step1:Complete the pitch and backlash compensation, and then disable quad-peak error compensation
(Pr136x, Pr144x).
Step2:Load the attached program, proceed the circular test under R150 F1500 (adjust if needed) conditions,
and observe the two quad-peak values on positive and negative direction.
Step3:Set Pr146x=1000/Pr18x; Pr138x=10; Pr136x and Pr144x equal to three times of the marked value (in
step 2) and then execute the circular test again and check for the result.
Step4: Normally, quad-peak error will decrease obviously, or even appear concave after compensation
applied.
Step5:Gradually decrease Pr1461~ 1476 (quad-peak error first hold time) to improve concave on positive
and negative direction. On contrary if peak error is still obvious instead of concave, increase value of
Pr1461~ 1476 to suppress the quad-peak error.
Step6:In step 5, if changing the first holding time Pr1461~1476 cannot compensate the positive and
negative quad-peak error at the same time, please slightly adjust Pr136x and Pr144x again.
I.e., Increase first holding time suppressed positive direction quad-peak but cause concave in
negative direction.
10.5 Q & A
Q1:If Ballbar shows an overcut and cause the second quad-peak error, how to solve this problem?
A1:First reduce the quad-peak error compensation to reduce overcut, and then extend the second hold time to
avoid a secondary delay caused by lowered axis speed.
Q2: How to set theamount of second quad-peak error compensation?
A2:The compensation is mainly to prevent the machine from secondary delay due to instant stop of compensation
command. The controller will set this value automatically according to the simulation results of first compensation.
Q3:After using the controller's built-in Ballbar Tuning screen, is it ensured that the quad-peak errors are
suppressed to a certain degree?
A3:The built-in ballbar tuning function, or electrical ballbar, mainly depends on the feedback of the motors to
evaluate the size of the quad-peak. It can effectively suppress quad-peak, but cannot accurately display the real
mechanical behavior. The real compensation effect can only be confirmed by Ballbar measurement, because it
reflects the real axis movement.
10.6 Remarks
Example Program
G54G90G17F3000; // basic setting
G01 X-151.5 Y0.0 Z0.0; // move to initial point
M00;                        // install Ballbar
G01 X-150.0 Y0.0; // enter measuring state
G03 I150.0 J0.0; // move counterclockwise 1
G03 I150.0 J0.0; // move counterclockwise 2
G01 X-151.5 Y0.0; // leave measuring state
M00; // pause
G01 X-150.0 Y0.0; // enter measuring state
G02 I150.0 J0.0; // clockwise
G02 I150.0 J0.0; // clockwise
G01 X-151.5 Y0.0; //leave measuring state
M30; // End

Syntec 22/220 Series Specifications

General

Brand	Syntec
Model	22/220 Series
Category	Controller
Language	English