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No.000140 Shuttle Transfer Mechanism
67
67
Two workpieces are transferred simultaneously through a belt mechanism.
Relevant category
High torque timing pulley
| Product name | High Torque Timing Pulleys S5M Type |
|---|---|
| Part number | HTPA28S5M250-A-P8-QTC18-M3 |
| Features | New! METRIC/ INCH Bores Available! |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Aluminum alloy, which is light and commonly used for timing belt driving pulley, was selected.
Available sizes
■Timing Pulleys (S5M type)
| Material | Surface Treatment | Accessory Set Screw | |
|---|---|---|---|
| Pulley | Flanged | ||
| 2017 Aluminum Alloy (Duralumin) | 5052 Aluminum Alloy | Clear Anodize | 304 Stainless Steel |
| Black Anodize | |||
| Hard Clear Anodize | |||
| Electroless Nickel Plating | |||
| 1045 Carbon Steel | Low Carbon Steel | ― | 4137 Alloy Steel (Black Oxide) |
| Black Oxide | |||
| Electroless Nickel Plating | |||
| 304 Stainless Steel | ― | 304 Stainless Steel | |
■Sizes and Dimensions
| Number of Teeth | Nominal Width | Pulley Shape | Shaft Bore Specs. | Shaft Bore Specs. (1mm Increments) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Straight Bore | Straight Bore+Tap | New JIS Keywayed Bore+Tap, Old JIS Keywayed Bore +Tap | Stepped Hole・Stepped Holes (Counterbore Holes on the Hub Side) | Both Ends Stepped Bore | |||||||||||||
| Hole Dia. | Hole Dia. | Counterbore Hole Dia. | Counterbore, Depth | Hole Dia. | Counterbore Hole Dia. | Counterbore, Depth | |||||||||||
| No Hub | With Hub | No Hub | With Hub | No Hub | With Hub | No Hub | With Hub | No Hub | With Hub | With hub, without hub | No Hub | No Hub | No Hub | ||||
| 14 | 100 150 250 | No Hub With Hub | Straight Bore Straight Bore +Tap New JIS Keywayed Bore + Tap, Old JIS Keywayed Bore + Tap Stepped Hole Stepped Hole (Counterbore Holes on the Hub Side) Both Ends Stepped Bore | 5-10 | 5-10 | 5-10 | 5-8 | 8・10 | - | 5・6 | 5・6 | 7・8 | 7・8 | (When No Hub) 2.0 ≤ Counterbore depth ≤ Ridge width - 2.0 (When with hub) 2.0 ≤ Counterbore depth ≤ Full length - 2.0 | 5・6 | 7・8 | 3-14 Total of counterbore depth ≤ Width - 3 |
| 15 | 5-10 | 5-10 | 5-10 | 5-8 | 8・10 | 5-8 | 5-8 | 7-10 | 7-10 | 5-8 | 7-10 | ||||||
| 16 | 5-12 | 5-12 | 5-12 | 5-10 | 8-12 | 8 | 5-10 | 5-10 | 7-12 | 7-12 | 5-10 | 7-12 | |||||
| 18 | 6-14 | 6-14 | 6-12 | 6-11 | 8-12 | 8・10 | 6-12 | 6-12 | 8-14 | 8-14 | 6-12 | 8-14 | |||||
| 19 | 6-16 | 6-15 | 6-16 | 6-11 | 8-16 | 8・10 | 6-14 | 6-13 | 8-16 | 8-15 | 6-14 | 8-16 | |||||
| 20 | 6-16 | 6-15 | 6-16 | 6-11 | 8-16 | 8・10 | 6-14 | 6-13 | 8-16 | 8-15 | 6-14 | 8-16 | |||||
| 22 | 7-19 | 7-19 | 7-18 | 7-15 | 8-18 | 8-12 | 7-17 | 7-17 | 9-19 | 9-19 | 7-17 | 9-19 | |||||
| 24 | 7-22 | 7-22 | 7-20 | 7-17 | 8-20 | 8-13 | 7-20 | 7-20 | 9-23 | 9-23 | 7-20 | 9-22 | |||||
| 25 | 7-22 | 7-22 | 7-20 | 7-17 | 8-20 | 8-15 | 7-20 | 7-20 | 9-23 | 9-23 | 7-20 | 9-22 | |||||
| 26 | 8-27 | 8-27 | 8-22 | 8-21 | 8-22 | 8-17 | 8-25 | 8-25 | 10-27 | 10-27 | 8-25 | 10-27 | |||||
| 28 | 8-27 | 8-27 | 8-24 | 8-22 | 8-24 | 8-18 | 8-25 | 8-25 | 10-27 | 10-27 | 8-25 | 10-27 | |||||
| 30 | 10-28 | 10-28 | 10-26 | 10-23 | 10-26 | 10-18 | 10-26 | 10-26 | 12-28 | 12-28 | 10-26 | 12-28 | |||||
| 32 | 10-32 | 10-32 | 10-28 | 10-27 | 10-28 | 10-22 | 10-30 | 10-30 | 12-32 | 12-32 | 10-30 | 12-32 | |||||
| 34 | 10-37 | 10-36 | 10-30 | 10-30 | 10-30 | 10-25 | 10-35 | 10-34 | 12-37 | 12-36 | 10-35 | 12-37 | |||||
| 36 | 10-37 | 10-36 | 10-30 | 10-30 | 10-30 | 10-25 | 10-35 | 10-34 | 12-37 | 12-36 | 10-35 | 12-37 | |||||
| 40 | 10-42 | 10-42 | 10-38 | 10-35 | 10-38 | 10-28 | 10-40 | 10-40 | 12-42 | 12-42 | 10-40 | 12-42 | |||||
| 44 | 12-50 | 12-46 | 12-42 | 12-38 | 12-40 | 12-32 | 12-48 | 12-44 | 14-50 | 14-46 | 12-48 | 14-50 | |||||
| 48 | 12-55 | 12-55 | 12-45 | 12-45 | 12-40 | 12-40 | 12-53 | 12-53 | 14-55 | 14-55 | 12-53 | 14-55 | |||||
| 50 | 12-59 | 12-59 | 12-45 | 12-45 | 12-43 | 12-43 | 12-57 | 12-57 | 14-59 | 14-59 | 12-57 | 14-59 | |||||
| 60 | 12-72 | 12-71 | 12-45 | 12-45 | 12-45 | 12-45 | 12-70 | 12-69 | 14-72 | 14-71 | 12-70 | 14-72 | |||||
| 72 | 12-80 | 12-80 | 12-65 | 12-65 | 12-50 | 12-50 | 12-80 | 12-80 | 14-92 | 14-86 | 12-75 | 14-92 | |||||
Selection steps
■Timing belt selection procedure
* Timing belt selection is made at the same time as selecting timing pulleys.
Automated selection tool is available.
http://fawos.misumi.jp/FA_WEB/pulley_us/
- Determine Operating Conditions
- Designed power, rotational speed, rotation ratio, interim shaft distance, motion pattern, etc.
↓
- Belt temporary selection
- Belt type·Belt width
↓
- Verification of specifications applicability
-
- Confirmation of calculated shaft distance, etc.
- Confirmation of belt tension and load
Technical calculations
■Timing pulley technical calculations
Timing belt clamp plates
| Product name | Timing Belt Clamp Plate - Nut Fitting Type, Single |
|---|---|
| Part number | TBCR-S5M250 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Cost Efficient
Available sizes
■Timing Belt Clamp Plate (Bottom plate Short type S5M)
| Material | Surface Treatment |
|---|---|
| A6N01-T5 | Clear Anodize |
■Sizes and Dimensions
| Belt Type | Belt Nominal Width | Vertical(mm) | Horizontal (mm) | Thickness(mm) |
|---|---|---|---|---|
| XL | 025 | 36 | 24 | 6 |
| 031 | 25 | |||
| 037 | 26 | |||
| 050 | 30 | |||
| L | 050 | 66 | 32 | 8 |
| 075 | 38 | |||
| 100 | 46 | |||
| 150 | 58 | |||
| H | 075 | 89 | 38 | 10 |
| 100 | 46 | |||
| 150 | 58 | |||
| 200 | 70 | |||
| S3M | 060 | 21 | 20 | 4 |
| 100 | 25 | |||
| 150 | 30 | |||
| S5M | 100 | 35 | 26 | 6 |
| 150 | 32 | |||
| 250 | 42 | |||
| S8M | 150 | 56 | 34 | 8 |
| 250 | 44 | |||
| 300 | 50 | |||
| 400 | 60 | |||
| TS | 100 | 35 | 26 | 6 |
| 150 | 32 | |||
| 200 | 38 | |||
| 250 | 43 | |||
| T10 | 150 | 70 | 34 | 8 |
| 200 | 40 | |||
| 250 | 44 | |||
| 300 | 50 |
Guides
| Product name | Guides- L-Shaped |
|---|---|
| Part number | WGLBC-20-10-10 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Easy to obtain
Available sizes
■Workpiece guide (L shaped compact type)
| Material | Hardness | Surface Treatment |
|---|---|---|
| 1045 Carbon Steel | ― | Black Oxide |
| Electroless Nickel Plating | ||
| 40HRC- | Black Oxide | |
| Electroless Nickel Plating | ||
| 2017 Aluminum Alloy | ― | ― |
| 304 Stainless Steel | ||
| Polyacetal | ||
| MC Nylon | ||
| Electrically conductive MC Nylon R2 | ||
| PTFE |
■Sizes and Dimensions
| On a side (mm) | Height (mm) | Installation Hole Dia. (mm) |
|---|---|---|
| 17、20 | 6－10 | 3.5 |
| 20、30 | 3.5 |
Accuracy Info.
■Accuracy information of workpiece guide
Perpendicularity: 0.05
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Application Overview
Purpose
- A single driving mechanism to simultaneously transfer two workpieces in opposite directions.
Points for use
- Automatic mechanism in which a single driving mechanism drives two tables.
Target workpiece
- Workpiece: printed circuit board
- Outer dimensions:W150 x D50 x H3 mm
- Workpiece weight:50g
Design Specifications
Operating Conditions or Design Requirements
- Table Stroke: 385mm
- Outer dimensions: W760 x D350 x H241 mm
Required Performance
- Required accuracy：±0.5mm
Selection Basis for Main Components
- Stepping motor
- Easy positioning.
Design Evaluation
Verification of main components
- The allowable motor torque is verified to see whether the torque requirement (= load torque + acceleration torque) is satisfied.
- Stepping motor
- Conditional value = allowable motor torque T = 2.7 Nm, transfer mass M = 2.6 kg, acceleration a = 0.385m/s², operation speed NM = 180 [r/min], linear guide friction coefficient μ = 0.1 (take a larger value), acceleration time s = 0.5 s, pulley diameter D = 0.04456 m, pulley reduction ratio i1 = 1, pulley weight m = 0.33 kg, rotor inertia moment = Jo = 120 × 10⁻⁷ [kg•m²], motor reduction ratio i2 = 10, efficiency η = 0.85
- Load in operation direction = F [N ] = Ma = M × (a + μg ) = 2.6 × (0.385 + 0.98) = 3.55
- Load torque TL [N•m] = (F × D)/(2 × η × i1) = (3.55 × 0.04456)/(2 × 0.85 × 1) = 0.093
- Loading moment of inertia JL [kg•m²] = M × (π × D/2 × π)² + (m × D²)/8 = 2.6 × (0.04456/2)² + (0.33 × 0.04456²)/8 = 0.0014
- Acceleration torque Ta [Nm] = ((Jo × i2² + JL)/9.55)) × (NM/s) = ((120 × 10 - 7 × 10² + 0.0014)/9.55) × (180/0.5 ) = 0.098 (9.55 is constant)
- Required torque TM [N･m] = from TL + Ta = 0.093 + 0.098 ≈ 0.19 < 2.7 = T
-> There is no problem.
Other Design Consideration
- When the motor is rotated, two belt movement directions can be obtained, and the belt is connected to two tables that can be moved in different directions.
- As the belt design tension of 206N cannot support the allowable overhang load of 50N, bearings are added. The mechanism is assembled using the following steps to protect the motor.
(1) Temporarily tighten the bolts that fix the motor.
(2) Strain the belt.
(3) Finally tighten the bolts to fix the motor. - Positioning accuracy may be low at the end of the travel.
- Table plates are welded for strength and reinforcement.
- As a measure against failure, one microphotosensor is used for home positioning, and another microphotosensor is used for overrun prevention.
- As the upper and lower tables pass each other, there is a risk of injury.
Therefore, the unit should have a cover for the entire mechanism to reduce the operator injury risk.
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