The GTS30V is the ideal foundation for applications that require long travel vertical motion of horizontally oriented samples. Its low profile and high-precision motion capabilities make this stage an excellent choice for applications such as semiconductor wafer inspection, scanning,micrsocopy, laser machining, automated device alignment, metrology, and quality control.When combined with the XM (Ultra-Precision Linear Motor Stages), GTS (High-precision linear stages), VP (Precision Compact Linear Stages), ILS (High-Performance Mid-Range Travel Linear Stages), or IMS (High-Performance Long-Travel Linear Stages) series of linear stages, the GTS30V is a space-saving alternative to traditional XYZ stacks of stages, and provides unobstructed access to the payload from any side. Furthermore, centering the payload over the bearings, ensures less cantilevered load effects and subsequent Abbe motion errors.High-precision vertical motion is achieved using a vertical guide system composed of matched pairs of anti-creep crossed roller bearings. Compared to alternative wedge designs, the direct vertical guide technology provides consistently lower and more repeatable runout errors. In addition, the lack of any recirculating elements in the bearings leads to outstanding ripple-free motion required in high-sensitivity focusing adjustments. Lastly, the geared retainers prevent bearing cage migration, a problem often found with other linear bearings, especially in vertical arrangements.A folded DC motor with a precision ground, low-friction lead screw arrangement delivers ultra-smooth motion and does not back drive even at high loads. A reduction belt between the motor and the lead screw increases the available output torque, reduces the servo sensitivity and ensures 100 nm minimum incremental motion with all Newport motion controllers and drivers.Precision position feedback is provided by an optical scale with 50 nm resolution. Compared to alternative designs featuring a screw mounted rotary encoder, this direct position feedback avoids drive train errors that impact positioning performance, hence leading to superior positioning accuracy and repeatability.