Linear positioning tables aren’t that big

Parker Hannifin has launched two new series of miniature precision linear positioning tables that are designed for applications involving very small work envelopes.

Parker Hannifin’s Electromechanical Division has launched two new series of miniature precision linear positioning tables that are designed for applications involving very small work envelopes.

The new 401XR and 402XR series of tables are characterised by narrow widths of just 40mm and 58mm respectively, and provide repeatable positioning to ±12 microns, with some models offering an even higher accuracy of ±5 microns.

The 401XR series tables have a load-carrying capacity of 50kg, and are available with a choice of five different travel lengths, from 50mm to 300mm.

The 402XR series tables have a higher load-carrying capacity of 100kg, and offer a choice of six travel lengths, spanning 100mm to 600mm.

Both series of tables employ high-efficiency precision-ground ballscrew drives, together with re-circulating bearing systems.

A choice of 2, 5 or 10mm ballscrew drive pitches enables users to achieve virtually any desired resolution/velocity ratio.

Most of the tables can handle positioning speeds up to 700mm/sec, and they all accommodate acceleration rates as high as 20,000mm/sec/sec and are rated for 100% duty cycle.

For applications demanding extremely high positioning accuracy, 401XR and 402XR series tables can be fitted with a linear encoder to provide direct feedback of the carriage position; there are three versions available, offering resolutions of 0.1, 0.5 and 1 micron.

The carriage assembly features dowel locating holes to simplify the registration of the payload and to ensure repeatable positioning. Removable aluminium covers and IP30-rated strip seals are fitted as standard, to guard against the ingress of contaminants.

401XR and 402XR series tables accept stepper or servo motors. Parker offers a selection of suitable motors, drives and controllers, as well as a number of in-line motor mounting adapters, and couplers for transferring motor torque to the table drive screw. A range of fully-adjustable travel limit and home sensors is also available, with a choice of flying leads or locking connectors.