HEIDENHAIN CNC PILOT 640 User Manual page 657

B axis | Fundamentals
Tools for the B axis
An advantage of the B axis is that it allows flexible use of the tools
during turning operations. By tilting the B axis and rotating the tool
you can bring it into positions that enable you to use one and the
same tool to machine in the longitudinal and transverse (or radial
and axial) directions on the main spindle and the counter spindle.
In this way, you need fewer tools and fewer tool changes.
Tool data: All tools are described in the tool database by specifying
the X, Z and Y dimensions as well as the compensation values.
These dimensions are referenced to the tilt angle B=0° (reference
position).
In addition, you specify the parameter Reverse the tool CW. It
defines the working positions of tools that are not driven tools
(turning tools).
The tilt angle of the B axis is not maintained with the tool data.
This angle needs to be defined in the tool call or when inserting the
tool.
Tool orientation and position
position the tool tip is calculated based on the orientation of the
cutting edge.
The control calculates the tool orientation of lathe tools by means
of the tool angle and point angle.
Multipoint tools for the B axis
If several tools are mounted on a tool holder, this is referred to as
a multipoint tool. Each cutting edge (tool) of a multipoint tool is
assigned a separate ID no. and description.
The position angle, which is identified by CW in the figure, is
included in the tool data. When a cutting edge (tool) of a multipoint
tool is activated, the control will rotate the multipoint tool into
the correct position. The position is determined from the position
angle, to which the offset position angle from the tool change
routine is added. This allows inserting the tool either in the
attitude or
upside down.
The photo shows a multipoint tool with three cutting edges.
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
display: For turning tools, the
normal
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