This work reports progress on a long-reach manipulator project. The origina
l single-arm manipulator was complemented with an identical second arm. We
introduce several non-contact motion control strategies which are based on
the reaction null space concept developed earlier. Experimental verificatio
n of disturbance compensation control via a single arm, and via the two arm
s while holding an object, is done. Also, motion feasibility on reactionles
s paths for a closed kinematic chain, including the two arms and the object
, is examined.