1132 HEIDENHAIN Technical Manual MANUALplus 620
Set the following parameter values to check the transition from straight line to
circle:
Record the following error s-diff and the jerk j-nom of the respective axes
with the integrated oscilloscope.
Turn the feed-rate potentiometer completely down.
Start the test program and turn the feed-rate potentiometer slowly and
carefully up until an acceptable following error (< few µm) is attained.
On the integrated oscilloscope, read the jerk j-nom at the transition from
straight line to circle of the respective axis.
Enter this jerk value in MP_axTransJerk.
For the adjustment of MP_axTransJerk described here it is essential to
consider only the geometric influences of the path (corner, transition from
straight line to circle etc.) The development of the feed rate is without effect.
In the table above, MP_minPathFeed is therefore set to a high value. A
reduction of the feed rate due to other criteria is thus prevented; the feed rate
stays constant during the measurement.
During roughing the jerk value can increase until the machine gets loud or the
following error s-diff becomes too large. For smooth surfaces during
roughing the corner jerk should barely limit the feed rate.
Reset the parameters to the original values when the check is finished!
Machine parameters Recommended values
CfgLaPath: MP_minCornerFeed 0
CfgLaPath: MP_minPathFeed Very high
CfgLaAxis: MP_axTransJerk Very high
HEIDENHAIN recommends:
Always record the feed rate during the measurements to check whether it
remains constant.
For more information on the MP_axTransJerk and MP_axPathJerk
parameters, please also refer to "Axis-specific limit values" on page 831.
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