Tool Change Point; Supplementary Conditions - Siemens SINUMERIK 840D sl Function Manual

W3: Tool change

17.6 Tool change point

17.6 Tool change point
17.6
Tool change point
The selection of the tool change point has a significant effect on the cut-to-cut time
(Page 968). The tool change point is chosen according to the machine tool concept and, in
certain cases, according to the current machining task.
Fixed point approach
Fixed positions on a machine axis stored in machine data can be approached by means of
the fixed-point approach function. This can be used to define and control one or several tool
change points.
Fixed point approach is possible in two ways:
● Fixed point approach in JOG
● Fixed point approach with G75
17.7

Supplementary conditions

17.7
The tool change requires, amongst other things, a tool management system which ensures
that the tool to be loaded is available at the tool change position at the right time.
970
The machine user starts the fixed point approach in the JOG mode with the traverse keys
or the handwheel.
References:
Function Manual Extended Functions; Handwheel and handwheel frame (H1), Chapter:
"Fixed point approach in JOG"
Fixed point approach is called from the part program via the command G75.
References:
Programming Manual Fundamentals, Chapter: "Travel commands" > "Approaching fixed
point (G75)"
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions