Centering and spreading unit PVXM series

Overview
The PVXM centering unit is a positioning support that enables fast, precise positioning of workpieces in manufacturing processes. The top plate slides freely through 360° to allow smooth positioning with minimal particle generation. The top plate returns to origin under no load via a magnetic return; models are available with top-plate lock and optional built-in lifting cylinders.

About the centering unit
The unit supports non-flat bottoms and slides 360° under load. Typical mounting uses four or more units to support a workpiece. When the workpiece is pushed by a cylinder, the top plate slides to centre the part; supplying air locks the top plate at the required position. This enables compact positioning solutions suitable for cleanroom production lines (for example LCD manufacturing). Latest PVXM models feature a reduced footprint compared with previous equivalents, improved homing accuracy via a PAT.P mechanism and lower particle generation.

General table (type / common specifications)
Type: Top plate returns to original position by magnet (PVXM)
Top plate lock: With lock / Without lock
Lifting unit: With lifting / Without lifting
Recommended load capacity: 98 N (10 kgf) to 29,400 N (3,000 kgf) depending on model
Horizontal stroke: Maximum ±50 mm
Use direction: Upward
Pressure range (when top-plate lock used): 0.2 MPa to 0.7 MPa
Temperature range: 0 °C to 60 °C

Models and example specifications
Model: PVXM300R-15 — Recommended load capacity: 2,940 N (300 kgf) — Horizontal stroke: ±15 mm — Floating stroke: - — Function: With top-plate lock mechanism
Model: PVXM1000R-50 — Recommended load capacity: 9,800 N (1,000 kgf) — Horizontal stroke: ±50 mm — Floating stroke: - — Function: With top-plate lock mechanism
Model: PVXM500R-25-L10W — Recommended load capacity: 4,900 N (500 kgf) — Horizontal stroke: ±25 mm — Floating stroke: 10 mm — Function: With top-plate lock mechanism, with lifting unit

PVXT (Centering unit for general environment) — summary
The PVXT series adapts the internal structure for harsher general environments, improving impact resistance, unloader load resistance, dustproofing and endurance. A dustproof cover is available as an option.
Example model: PVXT1000R-35 — Recommended load capacity: 9,800 N (1,000 kgf) — Horizontal stroke: ±35 mm — Function: With top-plate lock mechanism

Features / Usage notes

• Magnetic elements may affect nearby equipment depending on magnetic force.
• Operate the top plate within the specified horizontal stroke and rotation angle to avoid damage.
• Use without lubrication is recommended.

Cleanroom / Rising dust test summary (PVXM)
Test model: PVXM300R-15 (Top plate: SUS303 / Small ball: POM / Body: POM)
Test load: 2,940 N (300 kgf)
Stroke: 60 cycles/min, stroke 30 mm
Baseline particle count when idle: PARTICLE 0.3µ: 2 pieces; PARTICLE 0.5µ: 0 piece
Measuring equipment: AIR BORNE PARTICLE COUNTER RION HHPC-2 (sensitivity: 0.1 cfm/min) — Running time: Continuous running 10 hours/day for 30 days

Technical characteristics / specifications

• Material: Steel, Stainless, Resin
• Compliance: RoHS, PAT.P (patent mechanism for improved homing accuracy)
• Recommended load capacity range: 98 N (10 kgf) to 29,400 N (3,000 kgf)
• Example model capacities: PVXM300R-15 = 2,940 N (300 kgf); PVXM500R-25-L10W = 4,900 N (500 kgf); PVXM1000R-50 = 9,800 N (1,000 kgf)
• Horizontal stroke: up to ±50 mm (max)
• Floating stroke: model dependent (example: 10 mm for PVXM500R-25-L10W)
• Top plate return: Magnetic return (PVXM) or spring return (PVXT)
• Top plate lock: Available (with lock / without lock)
• Lifting unit: Available as option (with lifting / without lifting)
• Use direction: Upward
• Pressure range (when top-plate lock used): 0.2 MPa to 0.7 MPa
• Operating temperature range: 0 °C to 60 °C