Siemens SINUMERIK 840D sl Function Manual page 1376

W1: Tool offset
18.2 Tool
Example: Assigning D (cutting edges) to T numbers (tools) and listing options for checking
uniqueness:
● Assignment:
– T No. 1 ⇒ assignment of D numbers 1, 2, 3
– T No. 2 ⇒ assignment of D numbers 10, 20, 30, 40, 50
– T No. 3 ⇒ assignment of D numbers 100, 200, 30 (error: 30 was entered instead of 300)
● Check for uniqueness:
The D numbers of all tools defined within a TO unit must be unique.
The check is made using the CHKDNO command. When no parameters are specified, all D
numbers of all tools are checked with respect to one another. In this particular case, the
return value == FALSE, as D30 is available in tool T2 and T3.
Note
Cutting edges per tool
If tools with n cutting edges are used, then the value of the machine data should be set to
n. This prevents inadmissible cutting edges to be defined for a tool.
MD18106 $MN_MM_MAX_CUTTING_EDGE_PERTOOL = n
Programming examples
Renaming a D number
The D number of cutting edge CE = 3 is to be renamed from 2 to 17. The following specifications
apply:
● $TC_DPx[ <tool Tn>, <cutting edge Dm> ]
● Internal T number Tn = 1
● D number Dm = 2
● Tool with one cutting edge with:
● MD18105 $MN_MM_MAX_CUTTING_EDGE_NO = 20 (max. value of the D numbers)
Within the part program, this compensation is programmed as standard with T1, ....D2.
1376
Command Test
All D numbers of all tools are
CHKDNO
checked against all other tools
D number 30 in tools 2 and 3
CHKDNO (2, 3,
30)
All D numbers of tools 1 and
CHKDNO (1, 3)
3
Program code
$TC_DP2[ 1, 2 ] = 120
$TC_DP3[ 1, 2 ] = 5.5
$TC_DPCE[ 1, 2 ] = 3
Test result
Return value == FALSE, as D=30 is duplica‐
ted.
Return value == FALSE, as D=30 is duplica‐
ted.
Return value == TRUE although there is a
collision between the D=30 of the third tool
and D=30 of the second tool.
Comment
Tool length = 120
Tool radius = 5.5
Cutting edge number CE = 3
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions