Abstract: An X-Y gantry system is disclosed. The X-Y gantry system includes an X-axis element, a Y-axis element coupled to the X-axis element. An instrument is coupled to the Y-axis element. The Y-axis element includes a slider assembly with a slider and a guide support element coupled to the slider. The guide support element may have a flexible portion. The slider may or may not contact a slider bar in the system.

Abstract: A description is given of a process for preparing a multilayer coating on a substrate surface, in which(A) an aqueous coating composition (ii) containing as film-forming agent an aqueous polymer dispersion is applied as basecoat (II) to a substrate surface coated with an aqueous basecoat (i),(B) the composition applied in step (A) is subjected to partial drying,(C) an appropriate transparent topcoat composition is applied to the basecoat (II) thus obtained, and(D) the basecoats (I) and (II) are baked together with the topcoat,wherein the basecoat composition (II) contains an aqueous polymer dispersion comprising(x) an acrylate polymer based on from 30 to 60% by weight of C.sub.1 -C.sub.8 -alkyl (meth)acrylate monomers, from 30 to 60% by weight of vinyl-aromatic monomers and from 0.5 to 10% by weight of (meth)acrylic acid, and(y) a thickener, which does not have an associative effect, containing an acrylate copolymer based on (C.sub.1 -C.sub.6)-alkyl (meth)acrylate and (meth)acrylic acid.