MS-2500-AV XY Flat-Top Extended Travel Stage

MS-2500-AV XY Flat-Top Extended Travel Stage

The MS-2500-AV Stage has been designed to fit the Zeiss-Axio Observer. It is a low profile flat top designed with 250 mm of X-Axis and 110 mm Y-Axis travel (Microscope Limited). The AV-2500 stage accepts either 160 x 110 or 283 x 110 stages inserts. This System has high resolution, high repeatability, and precise motion. Through the use of closed-loop DC servomotors employing high-resolution rotary encoders for positioning feedback, the MS-2500-AV has the ability to uses three of the major linear encoder manufactures to improve repeatability to less than 300 nm (typical) compared to the standards rotary encoders 700 nm (typical) repeatability rating.

By using closed-loop control of the stage position, there is no chance that the stage will become lost, as can occur with open-loop micro-stepped stages after a number of moves and direction changes. The MS-2500-AV XY stage utilizes crossed-roller slides, a high-precision lead screw, and zero-backlash miniature geared DC servomotors for smooth and accurate motion. The Z-axis drive also uses ASI’s proven line of closed-loop motor drives, each custom fitted to the microscope. The microprocessor-controlled MS-2000 control unit provides for RS-232 and USB communication with a host computer.

More Info

MS-2500-AV Features
  • Obstruction-free flat top / Rigid top plate design
  • Obstruction-free flat top / Rigid top plate design
  • Thin profile: 34.5 mm (1.36”) from mounting surface to top
  • Closed-loop DC servo control of the X and Y-axes for precise positioning and highly repeatable focusing
  • Wide dynamic speed range with XY joystick control
  • Can be used with ASI’s proven Z-axis drives
  • Backlit LCD display shows axes’ coordinates
  • “Zero” and “Home” button for simple stand-alone operations
  • Compact ergonomic tabletop control unit size is 9 cm (H) x 23 cm (W) x 16½ cm (D) (3” x 9” x 6”)
  • Microprocessor control with RS-232 serial and USB communications
  • Proven operation with many popular software packages
  • Suitable for stand-alone, OEM, and specialty applications as well
MS-2500-AV Specifications for Standard Configuration
XY axis range of travel 250 mm x 75 mm
XY axis resolution (typical)* 22 nm
XY axis RMS repeatability (typical)* < 700 nm
XY axis maximum velocity* 7 mm /sec

*Shown with 6.35 mm pitch Lead Screw

MS-2500-AV Options
  • X and Y-axis Linear Encoders for high-accuracy positioning, incorporated into the stage plates
  • Stage Inserts to hold a variety of slides, dishes, sealed glass chambers, multiwell microplates, perfusers, heaters, and many other special items
  • Other lead screw pitches are available
Linear Encoder Options
MS-2500-AV Linear Encoder Options
Axis Resolution Scale Accuracy
XY 10 nm ± 3 μm per length of scale
Lead Screw Options
MS-2500-AV Lead Screw Options
Lead Screw Pitch Options Rotary Encoder Resolution Maximum Speed
25.40 mm (Ultra-coarse) 88 nm 28 mm/sec
12.70 mm (Super-coarse) 44 nm 14 mm/sec
6.35 mm (Standard) 22 nm 7 mm/sec
1.59 mm (Fine) 5.5 nm 1.75 mm/sec
0.635 mm (Extra-fine) 2.2 nm 0.7 mm/sec

*Standard Lead Screw Accuracy is 0.25 μm per millimeter

Product Compatibility
MS-2500-AV Product Compatibility


  • Axiovert 200
  • Axio Observer