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4.6.9 Reading the exact position
About positions and revolution counters
The exact position of the robot is determined using the position of the resolvers
and counters that count the number of resolver revolutions. These are called
revolution counters.
If the robot is correctly calibrated then the current position is automatically
calculated at start.
CAUTION
If the positions are displayed in red text then the values from the revolution
counters are lost and instead the values stored on the SMB are displayed. Be
careful when jogging the robot if the values are displayed in red text. Watch the
robot closely and do not use the displayed values! If the mechanical unit is
uncalibrated then the actual position can be very different from the position
values stored by the SMB. You must update the revolution counters before a
program can be started. See
Updating revolution counters on page 296
.
Note
If no positions are displayed then the mechanical unit is uncalibrated. Instead
the text
Selected mechanical unit is not calibrated
is displayed.
Note
When updating the revolution counters, the ongoing RAPID instruction or function
is interrupted, and the path is cleared.
How robot positions are displayed
Positions are always displayed as:
•
The point in space expressed in the x, y, and z tool center point coordinates.
•
The angular rotation of the tool center point expressed in Euler angles or as
a quaternion.
How additional axes’ positions are displayed
When an additional axis is moved, only the axis position is displayed.
Linear axis positions are displayed in millimeters expressed as the distance to the
calibration position.
Rotating axis positions are displayed in degrees expressed as the angle to the
calibration position.
Reading the exact position
This procedure describes how to read the exact position.
Action
On the
ABB
menu tap .
Jogging
.
1
Continues on next page
Operating manual - IRC5 with FlexPendant
143
3HAC050941-001 Revision: G
© Copyright 2018 ABB. All rights reserved.
4 Jogging
4.6.9 Reading the exact position
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