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No.000112 Synchronized Rotation Mechanism
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Synchronizes the index table and work piece holding tables rotation for inspection.
Relevant category
Pulley
| Product name | Timing Pulleys MXL Type |
|---|---|
| Part number | ATP44MXL019-B-P10 |
| Features | New! METRIC/ INCH Bores Available! |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Efficient angular transmission without slipping or speed changes
Available sizes
■Timing Pulleys MXL Type
| Material | Surface Treatment | Applicable Belt Width | ||||
|---|---|---|---|---|---|---|
| Pulley | Flanged | 4.8 | 6.4 | 9.5 | 12.7 | |
| 2017 Aluminum Alloy | 5052 Aluminum Alloy | Clear Anodize | ○ | ○ | ○ | ○ |
| Black Anodize | ○ | ○ | ○ | ○ | ||
| Hard Clear Anodize | ○ | ○ | ○ | ○ | ||
| Electroless Nickel Plating | ○ | ○ | ○ | ○ | ||
| 1045 Carbon Steel | Low Carbon Steel | − | － | ○ | ○ | － |
| Black Oxide | － | ○ | ○ | － | ||
| Electroless Nickel Plating | － | ○ | ○ | － | ||
| 304 Stainless Steel | 304 Stainless Steel | - | － | ○ | ○ | － |
■Shapes and Sizes
| Shape | Number of Teeth | Pitch circle Dia. | Shaft Bore Dia. |
|---|---|---|---|
| With Collar | 14-72 | φ9.6-46.57 | φ3-35 |
| No hub | |||
| With Hub |
* Available sizes to produce vary depending on materials and shapes
Please see the product pages for details.
Selection Steps
■Timing pulley selection steps
* Select the timing pulley together with the timing belt
The automated selection tool is available
http://fawos.misumi.jp/FA_WEB/pulley_us/
- Determine conditions of use.
- Designed power, rotational speed, rotation ratio, interim shaft distance, motion pattern, etc.)
↓
- Pulley (Belt) temporary selection
- Tooth profile・Belt width
↓
- Verify Specifications
-
- Confirmation of calculated shaft distance, etc.
- Confirmation of belt tension and load
Accuracy Info
■Timing pulley accuracy
Shaft Bore Tolerance:H7
Technical Calculations
■Technical Calculations
https://th.misumi-ec.com/en/pdf/tech/mech/US2010_fa_p3513_3534.pdf
Timing Belt
| Product name | Timing Belts - MXL / XL / L / H |
|---|---|
| Part number | TBN134MXL019 |
| Features | General purpose timing belts for transmission. Although some tooth fabrics for MXL and XL rubber belts are changed to comply with the bear-back specifications, it does not affect the performance. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Efficient angular transmission without slipping or speed changes
Available sizes
■Timing Belts - MXL / XL / L / H
| Material | ||
|---|---|---|
| Tooth Cover | Tooth Rubber | Core Wire |
| Nylon Cloth | Chloroprene Rubber | Glass fiber cord S/Z Alternately Twisted Continuous |
| Polyurethane | Polyurethane | Kevlar |
■Reference Dimensions
| Pitch | Belt Width | Belt length reference |
|---|---|---|
| 2.032 | 4.8、6.4、9.5、12.7 | 100-1100 |
Selection Steps
■Timing belt selection procedure
* Select the timing belt together with the timing pulley
The automated selection tool is available
http://fawos.misumi.jp/FA_WEB/pulley_us/
- Determine conditions of use.
- Designed power, rotational speed, rotation ratio, interim shaft distance, motion pattern, etc.)
↓
- Belt temporary selection
- Belt type・Belt width
↓
- Verify Specifications
-
- Confirmation of calculated shaft distance, etc.
- Confirmation of belt tension and load
Performance info.
■Timing belt load info.
Technical Calculations
https://th.misumi-ec.com/en/pdf/tech/mech/US2010_fa_p3513_3534.pdf
Idler
| Product name | Idler Pulleys - Backside Tension Type |
|---|---|
| Part number | AFBD9-20 |
| Features | Can be used as the tension adjuster for timing belts. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Necessary for maintaining the contact angle and belt tension
Available sizes
■Idler Pulleys - Backside Tension Type
| Material | Surface Treatment | Bearing Material |
|---|---|---|
| 2017 Aluminum Alloy | Clear Anodize | Steel |
| 1045 Carbon Steel | Black Oxide | |
| Electroless Nickel Plating | ||
| 304 Stainless Steel | - | Stainless Steel |
■Sizes
| Width | O.D. | Shaft Dia. | Material | |||
|---|---|---|---|---|---|---|
| 2017 Aluminum Alloy | 1045 Carbon Steel | 1045 Carbon Steel | 304 Stainless Steel | |||
| (Black Oxide) | (Electroless Nickel Plating) | |||||
| 9 | φ20 | φ5 | ○ | - | - | - |
| φ25 | φ6 | ○ | ○ | ○ | ○ | |
| 10 | φ25 | φ6 | ○ | - | - | - |
| 11 | φ25 | φ6 | ○ | ○ | ○ | ○ |
| 11.5 | φ25 | φ6 | ○ | ○ | ○ | ○ |
| 14 | φ30 | φ8 | ○ | - | - | - |
| 15 | φ30 | φ8 | ○ | ○ | ○ | ○ |
| 16 | φ40 | φ10 | ○ | ○ | ○ | ○ |
| 19 | φ30 | φ8 | ○ | - | - | - |
| φ35 | ○ | ○ | ○ | ○ | ||
| φ45 | φ10 | ○ | ○ | ○ | ○ | |
| 22 | φ35 | ○ | - | - | - | |
| φ45 | ○ | ○ | ○ | ○ | ||
| 26 | φ40 | ○ | - | - | - | |
| φ45 | ○ | - | - | - | ||
| φ50 | ○ | ○ | ○ | ○ | ||
* See the product pages for dimensions details.
IDEA NOTE Rotation of index table and rotation of work holder are synchronized.
As the index table rotation angle is 90 degrees and the rotation angle of the work holder is 90 degrees, the number of teeth on the fixed gear and that on the moving gear are the same. Gears with a module of 0.5 and 80 teeth are selected.
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It is configured so that each sub-assembly unit can be used as it is or edited.
Application Overview
Purpose
- Purpose
- Inspects workpieces that are placed on the index table at three different locations.
- Operation
- As the index table rotates clockwise 90 degrees to the next inspection position, the work piece holders simultaneously rotate 90 degrees counterclockwise.
Target workpiece
- Shape: circuit board.
- Size: W80 x D80 x H12 mm
- Weight: 40 g
Design Specifications
Operating Conditions or Design Requirements
- Rotation angle: 90 degrees, 4 positions
- Outer dimensions: W390 x D480 x H217 mm
Required Performance
- Positioning accuracy: ±0.1 degree
- Load weight: approx. 8.7 kg
Selection Criteria for Main Components
- For this application, we will select a safety factor of 3. Therefore, the index table must have an allowable thrust load of 226N (or higher) and an allowable moment of inertia of 0.15kg·m2 (or higher).
Design Evaluation
Verification of main components
- The thrust load and moment of inertia of the index table are verified based on the workpiece weight and moment of inertia.
- Thrust load and moment of inertia of index table
- Conditional value: mass of workpiece: W = 8.7 kg, gravitational acceleration: g = 9.8 m/s², safety factor: S = 3, allowable moment of inertia of index table: 0.17 kg·m²
- For the workpiece mass of 8.7 kg, the thrust load when considering the safety factor is F = 3 x 8.7 x 9.8 = 226 N, which is smaller than the allowable thrust load (800 N) of the selected index table. Therefore, the safety factor is verified.
- From the moment of inertia of workpiece: M = 0.050 [kg·m²], the moment of inertia when considering the safety factor (S = 3) is M1 = 3 x 0.05 = 0.15 kg·m², which is smaller than the allowable moment (0.17kg·m²) of inertia of the selected index table. Therefore, the safety factor is verified.
Other Design Consideration
- A shaft and collar is used to affix the index table.
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