1134 HEIDENHAIN Technical Manual MANUALplus 620
Recommended
settings
In the following recommendations it is assumed that the nominal position
value filters are not configured individually for each axis, but globally in
CfgFilter.
Recommended settings guidelines for "surface":
Basic settings:
Set small path jerk values:
CfgLaPath: MP_maxPathJerk
Optional:
CfgLaAxis: MP_axPathJerk, see "Axis-specific limit values" on page 831.
(On milling controls: Software option 2 is required!)
Use the advanced HSC or triangle filter
Important for uniform machining:
(= feed rate as constant as possible)
Set high transition jerk values:
CfgLaAxis: MP_axTransJerk
Perform an adjustment:
Goal:
Minimum following error (servo lag)
Use suitable NC program.
The TNCopt software from HEIDENHAIN features the "FF_100_[axis].h" NC
programs for feedforward adjustment.
Evaluate the following error s-diff – it should largely be less than 1 µm at a
constant feed rate.
Minimize the following error s-diff
Configuring different filters for axes with joint interpolation is only
permitted in special cases!
The rapid-traverse values MP_maxPatzJerkHi and MP_axPathJerkHi are
set to high values regardless of the desired criterion. They depend on the
wear of the machine elements rather than on the path quality.
Relationship between cutoff frequency (MP_frequency) and the effect of
the filters:
MP_frequency = small value:
(recommended for "surface" criterion)
Strong damping—the contour is milled more slowly and is smoothed more
MP_frequency = large value:
Weak damping—the contour is milled faster and is smoothed less
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