BMove Statement

Executes linear interpolation relative motion, in the selected local coordinate system.

Syntax
BMove destination [ROT] [CP] [ searchExpr ] [ !...! ] [SYNC]

Parameters

destination

Point data is used to specify the target position of the operation.

ROT

Optional. Decides the speed/acceleration/deceleration in favor of tool rotation.

CP

Optional. Specifies continuous path motion.

Till | Find

Optional. A Till or Find expression.

Till | Find
Till Sw(expr) = {On | Off}
Find Sw(expr) = {On | Off}

! Parallel Processing !

Optional. Parallel Processing statements can be added to execute I/O and other commands during motion.

SYNC

Reserves a motion command. The robot will not move until SyncRobots is executed.

Description
Executes linear interpolated relative motion, in the selected local coordinate system that is specified in the destination point expression.

If a local coordinate system is not specified, relative motion will occur in local 0 (base coordinate system).

Arm orientation attributes specified in the destination point expression are ignored. The manipulator keeps the current arm orientation attributes. However, for a 6-Axis manipulator (including N series), the arm orientation attributes are automatically changed in such a way that joint travel distance is as small as possible. This is equivalent to specifying the LJM modifier parameter for Move statement. Therefore, if you want to change the arm orientation larger than 180 degrees, execute it in several times.

BMove uses the SpeedS speed value and AccelS acceleration and deceleration values. Refer to Using BMove with CP below on the relation between the speed/acceleration and the acceleration/deceleration. If, however, the ROT modifier parameter is used, Move uses the SpeedR speed value and AccelR acceleration and deceleration values. In this case SpeedS speed value and AccelS acceleration and deceleration value have no effect.

Usually, when the move distance is “0” and only the tool orientation is changed, an error will occur. However, by using the ROT parameter and giving priority to the acceleration and the deceleration of the tool rotation, it is possible to move without an error. When there is not an orientational change with the ROT modifier parameter and movement distance is not 0, an error will occur.

Also, when the tool rotation is large as compared to move distance, and when the rotation speed exceeds the specified speed of the manipulator, an error will occur. In this case, please reduce the speed or append the ROT modifier parameter to give priority to the rotational speed/acceleration/deceleration.

The Till modifier is used to complete BMove by decelerating and stopping the robot at an intermediate travel position if the current Till condition is satisfied.

The Find modifier is used to store a point in FindPos when the Find condition becomes true during motion.

When parallel processing is used, other processing can be executed in parallel with the motion command.

Note

Using BMove with CP

The CP parameter causes the arm to move to destination without decelerating or stopping at the point defined by destination. This is done to allow the user to string a series of motion instructions together to cause the arm to move along a continuous path while maintaining a specified speed throughout all the motion. The BMove instruction without CP always causes the arm to decelerate to a stop prior to reaching the point destination.

See Also
AccelS, BGo, Find, !....! Parallel Processing, Point Assignment, SpeedS, TGo, Till, TMove, Tool

BMove Statement Example

> BMove XY(100, 0, 0, 0)'Move 100 mm in the X direction (in the local coordinate system)

Function BMoveTest

  Speed 50
  Accel 50, 50
  SpeedS 100
  AccelS 1000, 1000
  Power High

  P1 = XY(300, 300, -20, 0)
  P2 = XY(300, 300, -20, 0) /L
  Local 1, XY(0, 0, 0, 45)

  Go P1
  Print Here
  BMove XY(0, 50, 0, 0)
  Print Here

  Go P2
  Print Here
  BMove XY(0, 50, 0, 0)
  Print Here

  BMove XY(0, 50, 0, 0) /1
  Print Here

Fend

[Output]

 X:  300.000 Y:  300.000 Z:  -20.000 U:    0.000 V:    0.000 W:    0.000 /R /0
 X:  300.000 Y:  350.000 Z:  -20.000 U:    0.000 V:    0.000 W:    0.000 /R /0
 X:  300.000 Y:  300.000 Z:  -20.000 U:    0.000 V:    0.000 W:    0.000 /L /0
 X:  300.000 Y:  350.000 Z:  -20.000 U:    0.000 V:    0.000 W:    0.000 /L /0
 X:  264.645 Y:  385.355 Z:  -20.000 U:    0.000 V:    0.000 W:    0.000 /L /0

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