The
Gravity Alpha
is a positive rotation direction around the x-axis in the base
coordinate system. The value is set in radians.
Note
The system parameter
Gravity Alpha
is not supported for all robot types.
If the robot does not support
Gravity Alpha
, then use
Gravity Beta
along with the
re-calibration of axis 1 to define the rotation of the robot around the x-axis.
Note
The parameter is supported for all robots on track when the system parameter
7 axes high performance motion
is set, see
Technical reference manual - System
parameters
.
Gamma Rotation
Gamma Rotation
defines the orientation of the robot foot on the travel carriage
(track motion).
Mounting angles and values
The parameter
Gravity Beta
(or
Gravity Alpha
) specifies the mounting angle of the
robot in radians. It is calculated in the following way.
Gravity Beta = A° x 3.141593/180 = B radians
, where
A
is the mounting
angle in degrees and
B
is the mounting angle in radians.
Gravity Beta
Mounting angle (A°)
Example of position
0.000000 (Default)
0°
Floor mounted
1.570796
90°
Wall mounted
3.141593
180°
Inverted mounting
Examples of mounting angles tilted around the X axis (
Gravity Alpha
)
The following illustration shows the IRB 120, but the same principle applies for all
robots.
0°
xx2100000297
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72
Product manual - CRB 1300
3HAC083111-001 Revision: B
© Copyright 2022-2023 ABB. All rights reserved.
3 Installation and commissioning
3.3.4 Setting the system parameters for an inverted or a tilted robot
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