The XRS series positioning stage are compact, small cross section open or enclosed stages for short stroke linear servo applications (up to 12 in stroke). It is driven by either an iron core or ironless core 3-phase brushless linear motor and guided by 2 sets of parallel cross roller bearings. The stage can be with enclosed end covers and a set of bellows.
For higher force applications an iron core brushless linear motor is used. In this case the moving coil assembly is magnetically attracted to the stationary magnet assembly, which provides a preload for the crossed roller bearing system. For lower force applications and where velocity ripple is a concern due to cogging, an ironless core brushless linear motor is used
The dual parallel rail sets offer excellent load carrying capability.
The wide, low profile of the stage ensures a stable platform for the payload or as the bottom axis (X axis) of a stacked multi-axis system.
The small overall package size makes the XRS stage ideal as a Y or Z axis for short stroke positioning applications.
The XRS stage comes standard without bellows (folded way covers) , but they can be added as an option.
A cable carrier is not supplied with this stage because of the short stroke, but can be added as an option, if desired.
The XRS positioning stage incorporates the latest in linear motion technology:
- Motors:
1) non-contact 3 phase brushless , low cogging, iron core linear motor, commutated either sinusoidally or trapezoidally with Hall Effects. There is a large magnetic attractive force which provides a preload for the crossed roller bearing system. The encapsulated laminated coil assembly moves and the multi-pole single sided permanent magnet assembly is stationary.
2) non-contact 3 Phase Brushless Linear Motor, Ironless Core, commutated either sinusoidally or trapezoidally with Hall Effects. The encapsulated coil assembly moves and the multipole permanent magnet assembly is stationary. The lightweight coil assembly allows for higher acceleration of light payloads
- Bearings: Linear guidance is achieved by using a 2 parallel sets of crossed roller rails. The rollers and retainer are not sealed Periodic lubrication of the guides is recommended.
- Encoders: Non-contact glass or metal scale optical linear encoders with a reference mark for homing. Multiple reference marks are available and are spaced every 50 mm down the length of the scale. Typical encoder output is A and B square wave signals but sinusoidal output is available as an option
- Limit Switches: End of travel limit switches are included at both ends of the stroke. The switches can be either active high (5V to 24V) or active low. The switches can be used to shut down the amplifier or to signal the controller that an error has occurred. The limit switches are typically an integral part of the encoder, but can be mounted separately if required.
- Cable Carriers: Non standard can be added as an option.
- Bellows: Non standard can be added as an option.
- Hard Stops: Hard stops are incorporated into the ends of the stage to prevent over travel damage in the event of servo system failure.
Advantages:
- Wider footprint, very stable platform
- Lowest Profile
- Ideal for short stroke servo applications
- Large load carrying capability
- Smooth Operation
Applications:
- Pick and Place
- Vision Inspection
- Parts transfer
- Clean room
