14.6 Command: Fixed Waypoint
evaluated before we actually reach
WP 2
which is somewhat counter-intuitive when looking at the
program sequence. If a waypoint is a stop point and followed by conditional expressions to deter-
mine the next waypoint (e.g. the I/O command) it is executed when the robot arm has stopped at
the waypoint.
MoveL
WP_I
WP_1 (blend)
WP_2 (blend)
if (digital_input[1]) then
WP_F_1
else
WP_F_2
WP_I
WP_1
WP_2
WP_F_1
WP_F_2
*
Figure 14.5:
WP I
is the initial waypoint and there are two potential final waypoints
WP F 1
and
WP F 2
,
depending on a conditional expression. The conditional
if
expression is evaluated when the robot arm
enters the second blend (*).
Trajectory type combinations
It is possible to blend between all four combinations of trajectory
types of
MoveJ
and
MoveL
, but the specific combination will affect the computed blend trajectory.
There are 4 possible combinations:
1.
MoveJ
to
MoveJ
(Pure Joint space blend)
2.
MoveJ
to
MoveL
3.
MoveL
to
MoveL
(Pure Cartesian space blend)
4.
MoveL
to
MoveJ
Pure joint space blending (bullet 1) vs. pure Cartesian space blending (bullet 3) is compared in
figure 14.6. It shows two potential paths of the tool for identical sets of waypoints.
Of the different combinations, bullets 2, 3 and 4 will result in trajectories that keep within the
boundaries of the original trajectory in Cartesian space. An example of a blend between different
trajectory types (bullet 2) can be seen in figure 14.7.
Pure joint space blends (bullet 1), however, may behave in a way that is less intuitive, since the
robot will try to achieve the smoothest possible trajectory in Joint space taking velocities and time
requirements into account. Due to this, they may deviate from the course specified by the way-
points. This is especially the case if there are significant differences in a joint’s velocity between the
CB3
II-80
Version 3.10
Cop
yr
ight
©
2009–2019
b
y
Univ
ersal
Robots
A/S
.
All
rights
reser
v
ed.
Содержание UR3/CB3
Страница 1: ...Universal Robots UR3 CB3 Original instructions en US version...
Страница 2: ......
Страница 3: ...Universal Robots UR3 CB3 Euromap67 Version 3 10 Original instructions en US Version...
Страница 12: ...UR3 CB3 x Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 15: ...Part I Hardware Installation Manual...
Страница 16: ......
Страница 36: ...UR3 CB3 I 22 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 42: ...4 4 Maximum Payload UR3 CB3 I 28 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 62: ...5 7 Robot connection UR3 CB3 I 48 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
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Страница 94: ...E 1 Table 1 UR3 CB3 I 80 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 95: ...E 1 Table 1 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved I 81 UR3 CB3...
Страница 97: ...E 2 Table 2 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved I 83 UR3 CB3...
Страница 98: ...E 2 Table 2 UR3 CB3 I 84 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 99: ...Part II PolyScope Manual...
Страница 100: ......
Страница 122: ...10 13 Safety I O CB3 II 24 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 134: ...12 2 Pose Editor Screen CB3 II 36 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 166: ...13 18 Run Tab CB3 II 68 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 225: ...Part III EUROMAP 67 Interface...
Страница 226: ......
Страница 230: ...16 2 Statutory notice CB3 III 6 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 246: ...18 4 I O action and wait CB3 III 22 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 250: ...19 2 Uninstalling CB3 III 26 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...
Страница 254: ...20 4 Digital Outputs CB3 III 30 Version 3 10 Copyright 2009 2019 by Universal Robots A S All rights reserved...