It was possible to improve substantially the accuracy of the overall system with 12 axes, consisting of portal robot, tool and 3-axis positioner. Testing with a program generated off-line revealed an improvement in the overall accuracy by several centimetres to 1.5 mm.
Measuring with LaserLAB and loop:in takes less than 5 minutes and can be repeated by the customer at any time. As a result of the calibration, the robot and the portal axes are placed by loop:in in the positions for fine calibration. The customer simply runs a fine calibration of all axes at this position.
If the alignment is lost, the customer can calibrate all the axes automatically. Previously he had to use an extra lifting platform to raise the portal axes to the alignment positions at a height of about 3 metres.