Siemens SINUMERIK 828D Commissioning Manual page 338

Tool management
9.8 Application example for milling machine
Description of the sequence:
● NC program:
T command or T command with simultaneous tool change call (M6)
● Interface signals:
Job from TOOLMAN: DB43xx.DBX0.0 (job bit) and
DB43xx.DBB1 (command bits): Prepare change (DB43xx.DBX1.2)
● Magazine number and location number of the tools to be moved:
DB43xx.DBW6 to DBW20: Source location of the new tool, target location of the old tool
Step 1: 1:1 change requested
Request: Source location of the new tool == target location of the old tool
● Normal situation: There is a tool in the tool holder and a new tool is requested. Both tools
have the same location type and the same tool size in the magazine list, the tools are not
fixed-location coded.
The old tool is set down on the magazine location of the new tool, in a direct exchange (1:1
change). If there is no old tool in the tool holder (DB4300.DBX1.4), the same sequence
takes place. In this case, the magazine positions the new tool to the changing point.
→ Continue with Step 2
Request: Source location of new tool >< Target location of old tool, Special cases:
● The tool management is informed by DB43xx.DBX1.3 whether the active tool from the tool
holder should be removed (T0). In this case, the magazine positions the storage location
of the old tool (that is still in the spindle) to the changing point.
The magazine location for the old tool is also positioned to the changing point if the old tool
cannot be stored on the new tool location (1:1 change not possible). The cause could be
different location types or tool sizes, or that a fixed-location coded tool is involved. In this
case, the tool change is carried out in two steps. First the old tool in the magazine is set
down and then the new tool is transported to the spindle.
→ Continue with Step 3
Step 2: Position magazine, location from new tool to changing point
← Previous step: Step 1
For example, the magazine movement can be executed via an NC rotary axis controlled by a PLC. The
movement should be notified to the tool management. The magazine position is thus updated at the
user interface, in the views of the tool and magazine lists.
Acknowledgment to TOOLMAN:
The target position is read from DB4300.DBW8 (location number for new tool – source) and written to
DB9901.DBW2 (transfer step 101). If there is magazine coincidence at the target position, the step is
acknowledged asynchronously:
Acknowledgment
step
4
The variable location in magazine 1 is positioned at the changing point to the spindle.
Transfer step
324
Acknowledgment Transfer step new
bit tool
DB4200.DBX0.4 101
From
Magazine Location
Transfer step old
tool
0
To
Magazine
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3
Status
204
Location
CNC commissioning