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No.000200 Aligning Mechanism
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Aligning mechanism using pneumatics and linear guides
Related Category
Air Linear Guides
| Product name | Air Linear Guides/MPPT26 Series |
|---|---|
| Part number | MPPT16-20-MT |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Compact linear motion source with the precision guide integrated
Risk info.
Consider using this product with stopper depending on the workpiece
Available sizes
■Air Linear Guides - MPPT26 Series
| I.D. of Cylinder | Ø6 | Ø8 | Ø10 | Ø12 | Ø16 | |
|---|---|---|---|---|---|---|
| Stroke | 5 ･ 10 | 5 ･ 10 ･ 20 | 15 ･ 25 | 20 ･ 30 | ||
| Overall Width | 22.5 | 32 | 38 | 43 | 45.5 | |
| Overall Height | 13 | 19 | 20 | 22 | 29 | |
| Max. load mass (kg) | No Stopper | 0.2 | 0.3 | 0.8 | 1.2 | 2.0 |
| With Metal Stopper | 0.1 | 0.3 | 0.4 | 0.6 | 1.0 | |
| With Rubber Stopper | - | 0.5 | 0.8 | 1.2 | 2.0 | |
| Pneumatic Fitting Diameter | M3 | M5 | ||||
| Guide Mechanism | Slide Guide | |||||
| Operation Method | Bi-directional | |||||
| Actuation Medium | Air | |||||
| Max. Operating Pressure | 0.70MPa | |||||
| Min. Operating Pressure | 0.15MPa | |||||
| Withstanding Pressure | 1.05MPa | |||||
| Operating Temperature Range | 5 ~ 60°C | |||||
| Min. Operating Speed | 50mm/sec | 30mm/sec | ||||
| Max. operating speed | 120c.p.m | |||||
| Lubrication | Not Required | |||||
* See the product pages for details.
Accuracy Info
■Bearing Accuracies
| I.D. of Cylinder | Ø6 | Ø8 | Ø10 | Ø12 | Ø16 | |
|---|---|---|---|---|---|---|
| Parallelism | Plane C to Plane A | 0.04 | 0.03 | 0.02 | ||
| Plane D to Plane B | 0.04 | 0.03 | 0.02 | |||
| Running Parallelism | Plane C to Plane A | 0.007 | 0.005 | 0.004 | 0.003 | |
| Plane D to Plane B | 0.007 | 0.005 | 0.004 | 0.003 | ||
| E Dimension Tolerance | ±0.1 | ±0.1 | ±0.025 | |||
| F Dimension Tolerance | 0 ~ -0.1 | 0 ~ -0.2 | ±0.2 | |||
| G Dimension Tolerance | 0 ~ -0.1 | 0 ~ -0.05 | ±0.2 | |||
| H Dimension Tolerance | ±0.05 | ±0.05 | ±0.02 | |||
Performance info.
■Theoretical Thrust
| I.D. of Cylinder | Ø6 | Ø8 | Ø10 | Ø12 | Ø16 | |
|---|---|---|---|---|---|---|
| Operating Pressure (Mpa) | 0.4 | 11 | 20 | 31 | 45 | 80 |
| 0.5 | 14 | 25 | 39 | 57 | 100 | |
■Allowable Load Moment
| I.D. of Cylinder | Stroke | Allowable Load Moment (N･m) | ||
|---|---|---|---|---|
| M1 | M2 | M3 | ||
| Ø6 | 5 | 0.41 | 0.41 | 0.42 |
| 10 | 0.71 | 0.71 | 0.53 | |
| Ø8 | 5 | 0.42 | 0.42 | 0.87 |
| 10 | ||||
| 20 | 1.7 | 1.7 | 1.8 | |
| Ø10 | 5 | 1.2 | 1.4 | 2.3 |
| 10 | ||||
| 20 | 2.8 | 3.1 | 3.3 | |
| Ø12 | 15 | 2.4 | 2.9 | 4.7 |
| 25 | 6.5 | 7.7 | 7.3 | |
| Ø16 | 20 | 4.3 | 3.8 | 7.5 |
| 30 | 7.5 | 6.6 | 9.6 | |
Roller Pushers
| Product name | Roller Pushers/Low Particle Generation Type |
|---|---|
| Part number | RLLPK20-10 |
| Features | Uses low particle generation bearings. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Resin roller pushers will not damage the workpiece
Available sizes
■Roller Pushers -Low Particle Generation Type-
| Material | |||
|---|---|---|---|
| Cap | Posts / holders | Bolt | Bearing (Low Dust Generation) |
| Polyacetal | EN 1.4301 Equiv. | EN 1.4567 Equiv. | Stainless Steel Low Dust Generation Grease Filled Ball Bearings |
| Ultra High-molecular-weight Polyethylene | |||
| PEEK | |||
■Sizes
| Roller O.D. | Post Hex size | Post height increments of 5 mm | Roller Width | Thread Dia. | Thread Length |
|---|---|---|---|---|---|
| Ø10 | 5 | 5 ~ 30 | 10 | M3 | 4.5 |
| Ø20 | 10 | 10 ~ 50 | 14 | M6 | 9 |
| Ø30 | 13 | 10 ~ 70 | 18 | M8 | 12 |
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Application Overview
Purpose
- Aligning mechanism using pneumatics and a linear guide.
- An aluminum extrusion column is used as support for the mechanism.
- The workpiece is laterally aligned using this mechanism.
Points for use
- A workpiece is transferred from point A to point B.
- It is laterally constrained on the sides by the linear guide and pneumatic mechanism.
Target workpiece
- Workpiece in thin plate shape (resin).
- Outer dimensions: W640 x D320 (D640) x H2.2mm
- Mass: 0.53kg (1.06kg)
- The values in parentheses are those of another workpiece with different dimensions.
Design Specifications
Operating Conditions or Design Requirements
- Alignment mechanism:
Workpiece outstroking (alignment) stroke: 5mm - Device outer dimensions: W100 x D150 x H236mm
Required Performance
- Pneumatically driven linear guide
Total weight of loading mechanism [kg]: 0.08 (block) + 2 x 0.04 (roller pushers) + 1.06 (workpiece) = 1.22kg - Alignment accuracy: ±0.2mm
Selection Criteria for Main Components
- Pneumatically driven linear guide
- The thrust required for pushing a workpiece of 4.8N is selected.
Design Evaluation
Verification of main components
- The cylinder thrust is verified based on the workpiece load.
- Thrust of pneumatically driven linear guide
- Load: F = mgμ
- Mass: m = 1.22kg (total weight of pneumatically driven linear guide mounting parts + workpiece weight)
- Friction coefficient of conveyor roller in another unit: μ = 0.4
- Load applied to cylinder: F = 1.22 x 9.8 x 0.4 = 4.8N
- Cylinder output (when outstroking)
- Outstroke thrust: F1 = η x A1 x P
- Load factor: η = 1 (from catalog)
- Outstroke pressure area: A1 = 201mm² (from catalog)
- Operating pressure: P = 0.4Mpa
- F1 = 1 x 201 x 0.4 = 80.4N
- Safety factor: F1/F = 80.4/4.8 = 16.8
Other Design Consideration
- Alignment mechanism is mounted on the extruded aluminum column.
- Adjust the height of the aluminum column to adjust alignment mechanism height.
- Select a cylinder force that is sufficient for alignment and ensure it will not damage the workpiece.
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