Posts Tagged ‘Linear Stage’

Baldor LMDS – Dual Axis Linear Stepper Motor

The open-loop linear stepper motor provides the most economical linear motor positioning package. The compact dual-axis stepper motor provides travel along two axes in a single plane. The dual axis package is comprised of two components: a moving forcer (with bearings) and a stationary platen. A position verification system is available to close the loop.

The dual-axis linear stepper motor is designed for two-axis open loop positioning. It is a two axis stage with integrated air bearings and positioning system and offer very high levels of positioning performance. They are capable of move speeds of up to 1.5 metres/second at resolutions to 2.5 microns and with a repeatability of better than 2 microns. They also offer friction-free mechanics with zero-backlash and no wind-up — for a major performance improvement over traditional mechanical transmission design technologies, as well as maintenance savings. The bases are available in a choice of seven standard sizes with square or rectangular working areas ranging from 375 x 375 to 750 x 1500 mm.

The moving primary 2 or 4-phase dual-axis linear stepper motor consists of a moving forcer and a stationary platen. The forcer is made of four single-axis coil assemblies. Two of the forcer assemblies are mounted in series to provide a thrust in the X direction and the other two are mounted orthogonal (at 90 deg.) to the first two assemblies to provide thrust in the Y direction. The forcer assemblies are encapsulated in a hard anodized aluminum housing. The motor’s surface is lapped to provide a flat surface for the air bearing. The floating height of the air bearing is less than 25 µm [0.001 in]. The forcer is available in eight sizes, depending on the application’s
force requirements.

The platen is a photo-chemically etched steel plate that is filled with epoxy and ground. Standard mounting holes are provided on forcer and platen. The platen is available in sizes up to 0.24m x 0.34m [36 in x 59 in]. Preload for the bearing system is provided by the magnetic-attractive force between the forcer and the platen. The customer must bring power to the forcer with a cable, and provide the bearing air supply.

Features:

• Two-axis motion in a single plane
• Acceleration to 19.6 m/s2 [2g]
• High repeatability 5.08 µm [0.0002 in]
• Flatness = 12.7 µm/300 m [0.0005 in/ft.]
• Resolution = Full Step, Number of microsteps: 2-phase min. 5 µm [0.0002 in], 4-phase min. 2.5 µm [0.0001 in]
• Platens up to 914 mm x 1,498 mm [36 in x 59 in]
• For open position loop systems
• No tuning necessary
• Multiple forcers with overlapping trajectories on a single plate
• High stiffness air bearings
• Mount face up or inverted.
• Required drive: Microstepping drive
• Lowest cost dual-axis positioning stage

For further details please check out the Baldor Linear Motor & Stage Product Brochure

The KM series consist of linear guideway and ballscrew unit and are available in lengths from 150 mm (5.91 inches) to 1380 mm (54.33 inches). For saving space, the carriage of linear guideway and nut of ballscrew to a integral carriage-nut are combined. The carriage-nut cooperate with the U rail designed for high rigidity to achieve the high rigidity and high accuracy in the minimal space, especially to saving time of installation. Moreover, the design of two rows with Gothic-arch groove and contact angle of 45°can bear four directional loading.

Space Saving  Design: Combine the carriage of linear guideway and nut of ballscrew to a carriagenut, KM series can achieve the best use of space.

Four Directional Equal Load: KM series are applied two rows with Gothic-arch groove and designed to contact angle of 45°which enables it to carry an equal load in radial, reversed radial and lateral directions to suit to any mounting orientation.

High Rigidity: Base on the optimal analysis of FEM for the shape of U rail, it has the balance between light weight and high rigidity.

High Accuracy: The design of two rows with Gothic-arch groove and stable manufacturing technology can control the variation by load at the minimum. It can provide the smooth feed with high accuracy.

Additional Features: Proximity sensors and photo sensors are available as an option, models equipped with a sensor are provided with a dedicated sensor rail and detecting plate.

For further details please check out the KM Product Brochure