1118 HEIDENHAIN Technical Manual MANUALplus 620
5. Determining the
jerk
The following machine parameter will be optimized now:
Run the test program described previously in "Determining the k
v
factor."
Run the program at high speed (feed-rate override = 100 %).
With the integrated oscilloscope, record the actual feed rate (v act) and if
desired, the servo lag (s diff) as well.
Increase the parameter MP_maxPathJerk until the overshoot disappears.
Settings in the configuration editor:
NCchannel
ChannelSettings
CH_NC
CfgLaPath
maxPathJerk
Depending on the position of the axis slide on the ball screw, the axis can
have different mechanical properties. Therefore you should repeatedly
perform the following measurement several times in a row at different
positions within the traverse range.
The MP_maxPathJerk parameter is globally effective for all axes.
Therefore, sequentially determine the jerk for each axis individually. In the
parameter you then enter the jerk of the interpolating axis with the smallest
determined jerk value. The specific jerk values determined for each axis are
then entered in MP_axJerk.
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