Now drive the lower arm using the keys '+'
and '-' until the lower arm (more 
precisely: the plane determined by the
two centering pins) is relatively 
vertical to the base plate.

Confirm this position using 'Enter'.

As in previous operations, ROB3
drives 'dynamically' to this position, 
and you have the possibility for correction.

After 'Ctrl-Enter' the positioning is conc-
luded. Now measure the distance of the cen-
tering pin of the elbow to base plate (for
the vertically oriented lower arm) as exact-
ly as possible and enter the value with 'Enter'.