HEIDENHAIN iTNC 530 HSCI - Accuracy; Speed

824 HEIDENHAIN Technical Manual iTNC 530 HSCI
Accuracy
Definition of the term "accuracy":
 Maintaining the tolerances has the highest priority.
 Slight oscillations can be seen on the surface.
 Tolerances typically between 0.005 and 0.01 mm.
Settings guidelines for "accuracy":
 Preferential use of HSC filter (MP1200 = 2) (with limit frequencies greater
than 30 Hz).
 Lower jerk values in MP1090.0, MP1090.1, MP123x.x, MP124x.x than for
"speed".
 Low radial acceleration values with MP1070 (typical values are < 1.5 m/s²).
Ideally, circular paths should be checked with a KGM grid encoder from
HEIDENHAIN. However, in many cases the circular interpolation test with
the integrated oscilloscope or TNCopt suffices.
 MP122x = 1 (consideration of tolerance limits at curvature changes).
 The adjustment should be tested with suitable NC programs. The TNCopt
software from HEIDENHAIN features the "Contour-Single.h" NC program for
this. The advantage is that the speed and the contour deviations can be seen
directly.
Speed
Definition of the term "speed":
 Surface quality is secondary; short machining times have the highest
priority.
 Application: Roughing.
 Tolerances typically between 0.1 and 0.2 mm.
Settings guidelines for "speed":
 Filter selection
• For large tolerances (greater than 50 µm), preferential use of single
filters (MP1200 = 0)
• For small tolerances (less than 30 µm), preferential use of HSC filters
(MP1200 = 2). Setting for MP1222 = 0.
 High jerk values in MP1090.0, MP1090.1
 High jerk values in MP123x.x, MP124x.x (typical: factor 3 to 5 of the path
jerk)
 High radial acceleration via MP1070 (input value should not exceed the
values for linear axes from MP1060.x, maximum 5 [m/s
2
])
 Use M124 for a faulty NC program (from CAD system)
 When using the HSC filter: Program a high tolerance for rotary axes and
roughing filters (mode 1) via Cycle 32. Typical values for the rotary-axis
tolerances are around 0.01° to 5°. This can achieve significant speed
advantages. However, possible undercuts must be taken into account.
 The adjustment should be tested with suitable NC programs. The TNCopt
software from HEIDENHAIN features the "Contour-Single.h" NC program for
this. The advantage is that the speed and the contour deviations can be seen
directly.