Siemens SINUMERIK 840D sl Commissioning Manual page 150

9 Additional Functions
9.8 Working with two tool carriers
G code programs
9-150
A tool length limit is defined using the MD 9838 $MM_ST_BOR-
DER_TOOL_LEN_X_REV_2. Tools can be automatically assigned to the two tool
carriers by means of this:
Tool length< MD 9838: Tool carrier1
Tool length ≥ MD 9838: Tool carrier2
If the tool length is ≥ MD 9838, mirroring takes place.
For the mirroring used for the X and Y axes and offsets of the C axis, the follow-
ing machine data must be configured:
MD 24006 $MC_CHSFRAME_RESET_MASK='H11'; Bit 4 = 1
MD 24007 $MC_CHSFRAME_RESET_CLEAR_MASK='H00' ; Bit 4 = 0
MD 28082 $MC_MM_SYSTEM_FRAME_MASK='H31'; Bit 4 = 1
MD 28083 $MC_MM_SYSTEM_DATAFRAME_MASK='H1F'; Bit 4 = 1
Due to the coordinate system being mirrored, the following machine/setting data
must be set:
MD 21202 $MC_LIFTFAST_WITH_MIRROR=1
Mirroring with LIFTFAST
SD 42910 $SC_MIRROR_TOOL_WEAR=1
Mirroring of tool wear
MD 9478 Bit 19 = 1; if no turret is being used.
Note
If there are a large number of old G code programs that were programmed
without mirroring of the X axis, you should consider setting mirroring for G code
programs.
SINUMERIK 840D sl Commissioning Manual CNC: ShopTurn – 11/2006 Edition
© Siemens AG 2006 All Rights Reserved
11/2006