Belt driven continuous rotary stage
225 mm diameter model
Loads up to 75 kg
Resolution to 0.41 arc-seconds
Continuous rotary motion
Integrated brushless servo motor
Uses a precision steel reinforced timing belt for its drivetrain in addition to an interlocking tooth system for exceptional stiffness
Infinite flexibility in the home and limit transition positions
Optional failsafe brake
Aluminum or steel construction
Class 10 cleanroom option

PFR225

The Primatics PFR225 offers solutions to your rotary positioning needs. Our innovative drive system creates arc-second repeatability and fast settling times, making the PFR225 ideal for point to point indexing, assembly and optical applications where worm drives don't provide the necessary accuracy, throughput or life.

Precision Grade Performance Specs	Timing Belt & Low Resolution Ring Encoder	Timing Belt & High Resolution Ring Encoder
Travel (degrees)	360
Table Diameter (mm)	225
Nominal Resolution (arc-sec)	2.1	0.41
Mechanical Drive System	25mm steel reinforced timing belt
Max Speed (rps)	4	1
Axial Runout (microns)	+/- 3
Radial Runout (microns)	+/- 3
Accuracy (arc-sec)	+/- 45
Bi-directional Repeatability (arc-sec)	+/- 6	+/- 2
Continuous Torque (motor) (N-m)	0.5
Peak Torque (motor) (N-m)	5.7
Gear Ratio	8
Axial Load Capacity (kg)	75
Radial Load Capacity (kg)	45
Weight (kg) (Aluminum Base)	12.2
Weight (kg) (Steel Base)	36.4

Smart Design

The PFR225 features a tensioned, precision, steel reinforced timing belt for its drivetrain. The belt has an AT5 tooth profile with nylon faced teeth, providing exceptional stiffness and smooth tooth engagement. Accuracy and repeatability are enhanced through a ring encoder located on the rotating platen providing output feedback directly on the load. An oversized cross roller bearing supports the platen, delivering high load capacity, excellent rigidity, and long life.

Performance Verification

All PFR225 performance specifications are verified and a full set of accuracy & repeatability plots are included with each stage. Additionally, each unit undergoes extensive burn-in and testing. These steps ensure that the stage will deliver optimal performance over a long period of time.