Siemens SINUMERIK 840D Operation/Programming Manual page 107

2
10.04
Moving clear
Swivel methods
Direction
Fixing the tool tip
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
The following provides an explanation of the most important
parameters for swiveling:
Before swiveling the axes you can move the tool to a safe retraction
position. The retraction options available to you are defined when
setting up the swivel data block in the "retraction position" parameter.
Please refer to the machine manufacturer's instructions.
Warning
You must select a retraction position that does not cause the tool and
workpiece to collide in a swivel action.
Swiveling can be axis by axis or direct.
•
Axis-by-axis swiveling is based on the coordinate system of the
workpiece (X, Y, Z). The coordinate axis sequence can be
selected freely. The rotations are applied in the selected order.
ShopMill calculates the rotation of the rotary axes (A, B, C) based
on those values.
•
In direct swiveling, the positions of the rotary axes are specified.
ShopMill calculates a suitable new coordinate system based on
those values. The tool axis is aligned in the Z direction. You can
derive the resulting direction of the X and Y axis by traversing the
axes.
The positive direction of each rotation for the different swivel methods
is shown in the help displays.
In swivel systems with 2 rotary axes, a particular plane can be
reached in two different ways. You can choose between these two
different positions in the "Direction" parameter. +/- refers to the larger
or smaller value of a rotary axis. This may affect the working area.
When setting up the swivel data block, the entries you make in the
"Direction" parameter determine for which rotary axis you can choose
between the two settings.
Please refer to the machine manufacturer's instructions.
If one of the two positions cannot be reached for mechanical reasons,
the alternative position is automatically selected irrespective of the
setting in the "Direction" parameter.
To avoid collisions, you can use the 5-axis transformation (software
option) to retain the position of the tool tip during swiveling. This
function must be enabled when you set up "Swivel" in the "Correction
T" parameter.
Please refer to the machine manufacturer's instructions.
Operation
2.8 Manual mode
2
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