HEIDENHAIN TNC 620 User Manual page 20

Fundamentals
TNC model, software and features
Modified functions 81760x-03
When editing the tool table or tool management, only the
current table line is blocked, see "Editing the tool table",
page 180
When importing tool tables, missing tool types are imported as
an Unidentified Type, see "Importing tool tables", page 183
You cannot delete the tool data of tools still stored in the pocket
table, see "Editing the tool table", page 180
In all manual probing functions, you can quickly select the
starting angle of holes and studs using soft keys (paraxial probe
direction), see "Functions in touch probe cycles", page 508
When probing, after acceptance of the actual value of the 1st
point, the soft key for the 2nd point for the axis direction is
shown
In all manual probing functions, the direction of the reference
axis is suggested as a default
In manual probing cycles the hard keys END and ADOPT
ACTUAL POSITION may be used
The display of the machining feed rate has been changed
in manual mode, see "Spindle speed S, feed rate F and
miscellaneous function M", page 491
In the file management, the programs or directories at the
cursor position are also displayed in a separate field beneath the
current path display
Editing a block does not mean that block marking is canceled.
If a block is edited in active block marking, and then another
block is selected via syntax search, the marking is expanded to
include the newly chosen block, see "Marking, copying, cutting
and inserting program sections", page 115
In the screen layout PROGRAM + SECTS it is possible to edit the
structure in the structure window, "Definition and applications"
The functions APPR CT and DEP CT allow approach to and
departure from a helix. This movement is carried out as a helix
with an even pitch, see "Overview: Types of paths for contour
approach and departure", page 216
The functions APPR LT, APPR LCT, DEP LT and DEP LCT
position all three axes at on the auxiliary point at the same time,
see "Approaching on a straight line with tangential connection:
APPR LT", page 219, see "Approaching on a circular path with
tangential connection from a straight line to the contour: APPR
LCT", page 221
The values entered for the traverse limits are checked for
validity, see "Entering traverse limits", page 582
When calculating the axis angle in the axes chosen with M138,
the control sets the value to 0, see "Selecting tilting axes:
M138", page 455
The input range in columns SPA, SPB and SPC in the
preset table has been expanded to 999,9999, see "Datum
management with the preset table", page 497
Tilting is permitted in combination with mirroring, see "The
PLANE function: Tilting the working plane (software option 8)",
page 425
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HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015