Now the lower arm should be set somewhat
perpendicularly with respect to the upper
arm.

If this condition cannot be fulfilled for
ROB3 in its momentary position, proceed
as follows:

Loosen the two screws, with which the 
black plastic covering of the Poti's
in the elbow joint at the front section
of the upper arm is attached - until this
plastic section (still attached) can just 
be turned. Now turn this section, whereby
the electronics of the lower arm 
constantly adjusts, until the lower arm
is located almost perpendicularly to the 
upper arm.

When you have set a satisfactory position,
(moderately) retighten the two screws and
confirm this using 'Enter'.