YASKAWA NX100 Operator's Manual page 84

3 Teaching
3.3 Checking Steps
BWD Movements
• The manipulator moves in reverse step number sequence. Only move instructions are
executed.
• The manipulator stops after playing a single cycle. It does not move after the first step is
reached, even if [BWD] is pressed. However, at the beginning of a called job, the
manipulator moves to the instruction immediately before the CALL instruction.
Manipulator stops.
Step 1 Step 2
Circular Movements with FWD/BWD Key Operations
• The manipulator moves in a straight line to the first step of the circular interpolation.
• There must be three circular interpolation steps in a row to move the manipulator in an
arc.
• If [FWD] or [BWD] operation is restarted after being stopped to move the cursor or to
perform search, the manipulator moves in a straight line to the next step.
• If [FWD] or [BWD] operation is restarted after being stopped to move the axis as shown in
the following, the manipulator moves in a straight line to P2, the next circular interpolation.
Circular motion is restored from P2 and P3.
P1
Spline Curve Movements with FWD/BWD Operations
• The manipulator moves in a straight line to the first step of spline interpolation.
• There must be three spline curve motion steps in a row to perform a spline curve
operation.
• Depending on the position where the [FWD] / [BWD] operation is performed, the alarm
"IRREGULAR DISTANCES BETWEEN TEACHING POINTS" may occur. Note that FWD/
BWD inching operations change the path of the manipulator and caution is therefore
required. Performing these operations also increases the likelihood that the
"IRREGULAR DISTANCES BETWEEN TEACHING POINTS" will occur.
• If the [FWD] or [BWD] operation is restarted after being stopped to move the cursor or
perform a search, the manipulator moves in a straight line to the next step.
• If the [FWD] or [BWD] operation is restarted after being stopped to move the axis as
shown in the following, the manipulator moves in a straight line to P2, the next spline
curve motion step. Spline curve motion is restored from P2 onward. However, the path
followed between P2 and P3 is somewhat different from the path followed at playback.
Step 1 Step 2
Step 3
(CALL instruction)
Moves with linear interpolation.
P2
P3
3-20
Called Jobs
Step 3 Step 4
: Motion path for FWD/BWD key operation
: Motion using axis keys
: Motion path during playback
149235-1CD
Step 5
84 of 493
RE-CSO-A031