HEIDENHAIN TNC 306 Technical Manual - Manual (Page 506)

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TNC406/TNC 306 Update Information No. 11
1-7
• New M function M93 for repositioning
The M function M93 was introduced to facilitate programming the OEM cycles required for
erosion of vector or star cavities. Erosion blocks (also circles / helixes) that are programmed with
this M function are automatically returned by the control to the starting point after execution (as
in the disk cycle). M93 is permitted only when M36 is active.
• Improvement of the eroding-with-time-limit function
Cycle 2 (erosion with time limit) is now effective also for erosion blocks with M93.
• The number of retraceable contour elements was doubled from at least 20 to at least 40 (worst
case). The actual number depends on the complexity of the blocks, whereby for example more
simple line segments can be retraced than helical contour elements. For most contours
consisting of circular arcs and line segments, approx. 56 to 60 blocks can be retraced.
• CASE branch in the PLC
The maximum number of calls programmable in a CASE branch was increased from 32 to 128.
• Improved test functions
In the Test mode, pressing the STOP AT N soft key now calls menu with which you can program
the block number (break point), the program name and a repetition counter. The breakpoint can
therefore also be set in any subprogram with loop counter. The test run up to the breakpoint is
started with the START soft key.
• Customized character set
New machine parameter MP7232
Input value: 0 to 9:
0 = disable OEM fonts display
1 – 9 = enable OEM fonts display, the number sets the distance in pixels between any 2
characters on the screen.
In the PLC chip you can now program your own character sets to be used in the display. You can
activate these so-called OEM fonts with MP7232. This function is limited to the display of
dialogs, operating modes, and NC error messages. PLC error messages and PLC dialogs cannot
be display in OEM fonts. The character set and character sequence for OEM fonts must be
programmed with the PLC compiler (PLCEPROM version V2.44 and later).
Two new code words FONT and OEMTEXT were introduced. They must be programmed
in the EPROM project file (see User's Manual for PLC.EXE).
Example:
Content of OEMTEST.EPJ:
; Project file
...
FONT
CHINESE.FON ; Code word in project file
OEMTEXT CHINESE.TXT ; Code word in project file
...