The STR43xxx is a low cost Rack and pinion system, that offers 4" of radial travel (R) and 360° rotation (Theta) in a thin (25mm thick) stage. The rotary axis is belt driven. The stepper motors provide for no servo jitter while still maintaining a positive return force at position. The stage has a maximum speed of 100mm/sec. The speed can be controlled via the USB (COM Port). The stage easily attaches to most microscopes with its standard circular dovetail mount, and has adjustable stage centering.. The rotary table has a 1/8" center pin (concentric to .0003") for accurate sample mounting. The Theta control is capable of locating a desired (R, theta) point, or of continuous rotation. The R-Axis is repeatable to 20um (5um unidir) with submicron resolution. The unit also provides control of the microscope Z-axis with a motor drive which easily attaches to most microscopes and has up to 0.05um resolution. The stage system comes with our standard RTZ controller. There are two configurations of the controller. A desk top unit with built in joystick and an under the desk unit with remote joystick. Either controller provides precise control of the R, Theta axis speed through an exceptionally smooth joystick. The speed is proportional to joystick deflection providing velocities from as slow as single steps to full traverse speed. A rotary knob provides variable speed theta control, from single steps to full traverse speed, with "turbo" at the extremes for quick traverse. Optional remote z-axis focus is provided via a focusing knob on the controller. The unit also provides three user-selectable sensitivities for the joystick, theta control and Z-knob for added adaptability. The unit can be controlled manually or by the user's external computer vis standard USB (COM Port) commands. R, theta and Z coordinates are displayed locally on the controller's LED display. These coordinates are also available via USB (COM Port). The stage STR43xxx is an economical unit that works well in a wide range of applications. Custom versions and modifications can be made.

• R axis travel - 4" inches
• R axis equivalent pitch 27.09672mm
• R axis speed 100mm/sec
• R axis Resolution - 0.678um
• R axis Repeatability - 20um (5um unidir)
• R axis Cross-roller bearings for extra precision and rigidity
• Theta Travel - 360°
• Theta Resolution - .0013°
• Theta Repeatability - .026°
• Theta concentricity better than .0003"
• Z axis travel - Entire Microscope focus travel
• Z axis Resolution - 0.05um (depends on microscope)
• Tabletop controller unit size is 7"D x 10.5"W x 3.5"H

• Stepper motor control with no servo jitter.
• Positive retention force at position.
• Three user-selectable speed sensitivities (joystick/rotary knob).
• Cast aluminum controller shields against RFI radiation from internal microprocessor.
• LED display of R, Theta and Z coordinates
• Complete remote control via USB (COM Port) Serial Communications
• Maximum speed in excess of 25mm/sec or 1/7 rotation per sec
• Remote focus of the Z-axis via rotary knob on controller.
• User Adjustable R-axis Limit Switches.
• Remote Control Knob feels and responds like a manual focus knob. No lag or overshoot. Controller responds instantly to manipulation of the Control Knob.
• 3 operator selectable levels of Control Knob responsiveness.
• Clean room compatible.
• Universal 50/60 Hz, 90-240 Volt AC input power supply.