Transfers MicroSpan Transfers 1 revised -7
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Contents Overview... 4 Nose Bar Dimensions... MicroSpan Chain Types... 6 MicroSpan Features... 7 Power Transmission... 7 Variable Angles... 8 Lift Out Capability of Gear-Driven Version... 9 Bottom Guarding... 9 MicroSpan Features Independent Unit... Roller Chain Drive... Optional 6mm MicroSpan Chain... 11 Determining Transfer Shaft RPM... 12 Sprocket / Pitch Formula... 12 MicroSpan Features Gearmotor-Powered Unit... 13 Available Speeds... 13 Product Specifications All Transfer Models... 14 Maximum Load and Torque Ratings 4mm Flat Top Chain (U.S. Units)... 14 Maximum Load and Torque Ratings 4mm Flat Top Chain (Metric Units)... 1 Maximum Load and Torque Ratings 4mm Raised Chain (U.S. Units)... 16 Maximum Load and Torque Ratings 4mm Raised Chain (Metric Units)... 17 Maximum Load and Torque Ratings 6mm Raised Chain (U.S. Units)... 18 Maximum Load and Torque Ratings 6mm Raised Chain (Metric Units)... 19 MicroSpan Chain Widths... 2 Transfer Width vs. Conveyor Width... 21 MicroSpan Transfer Dimensions and Specifications... 22 Standard Sprocket Layout... 23 3 revised -7
MicroSpan Transfer Overview SpanTech s MicroSpan Transfers are used for applications in which the product flows in a linear manner from one conveyor to the next. These units are washdown-capable and are available on all SpanTech conveyor product lines. They are also available separately for use on other conveyor systems. In either case, a MicroSpan Transfer can be slave driven from the main conveyor shaft, or independently powered by its own gearmotor. 38mm (1. ) The MicroSpan Transfer application shown in the photograph (above) illustrates a Raised Top conveyor chain on the incoming side, working in conjunction with feed-off fingers to transport the product onto the Transfer. The Transfer then discharges the product onto a plain, flat top conveyor. Note the small size of the product that the unit is transferring; the cookies in this example are only 38mm (1. ) in diameter. revised -7 4
Nose Bar Dimensions The small Nose Bar (right) permits small products to be transferred from one conveyor to the next. Configured for end-to-end transfer, the gap can be as small as mm (1.97 ) when used in conjunction with a conveyor having Plain chain (below left), or as small as mm (.39 ) when used with SpanTech s Raised Top chain conveyor, in conjunction with feed-off fingers (below right). When configured for right-angle transfer (bottom, inset), the gap can be as small as 8mm (.32 ). 4mm Chain 6mm Nose Bar 14mm (. ) End-to-End Transfer Plain Chain (side view) MicroSpan Transfer mm (1.97 ) Plain chain Raised Top chain End-to-End Transfer Raised Top Chain (w/fingers) Fingers MicroSpan Transfer Right Angle Transfer (plan view) Conveyor MicroSpan Transfer Conveyor 8mm (.32 ) Inset (side view) revised -7
MicroSpan 4mm Flat Top MicroSpan Chain Types FLOW MicroSpan 4mm Raised Top FLOW See page 11 for additional, optional chain types revised -7 6
MicroSpan Features The following MicroSpan Transfer features apply to Transfers adapted to SpanTech s Designer System family of conveyors. Power Transmission The MicroSpan Transfer is typically slave-driven from the conveyor shaft (below). Nose Bar MicroSpan Chain Conveyor Shaft Power Take Off Gear Intermediate Gear Power Gear Power transmission is accomplished through an all-gear drive (above). Shaft Sprockets Like roller chain, MicroSpan chain is sprocket-driven and therefore no tracking mechanism is required. The chain needs only slight tension on the slack side of the drive. It is not necessary to tension the overall belt as with a belt conveyor. 7 revised -7
Conveyor chain Variable Angles The variable angle feature is common to all MicroSpan Transfers, regardless of design. angle The Transfer s angle is for decline when used for feed off applications, and for incline when used with feed on applications. MicroSpan Transfer Conveyor Transfers with Plain chain: max. UP angle = max DOWN angle = Transfer chain max. revised -7 8
Lift Out Capability of Gear-Driven Version (MultiSpan Conveyors Only) A key feature of the Transfer, when used with MultiSpan conveyors, is its ability to be lifted out of place. There are two Lift Out Handles that can be raised from their recessed positions (below left) into their UP positions (below right), to serve as ready hand holds when removing the unit for cleaning or maintenance. (Pop Up Handles in DOWN position) Pop Up Handles in UP position Nose Bar Chain Power Gear NOTE The lift-out capability is also an important safety feature; if something becomes lodged on the infeed side, the unit will lift up. Bottom Guarding There are two options for the return chain guard. One option is designed for Transfers used in endto-end applications (below left). The other option is designed for applications where the end of the Transfer unit is accessible (below right). End-to-End Transfer Open End Transfer Guard shown in Lowered position Guard shown in Lowered position 9 revised -7
MicroSpan Features Independent Unit (adapted by customer to other conveyors) The following MicroSpan Transfer features apply to Transfers supplied as separate, independent units (below), intended for use with equipment or conveyors not supplied by SpanTech. Only features that are different from the standard Transfer previously described are listed below. Roller Chain Drive MicroSpan Chain Tensioner Power Gear Roller chain Power Gear NOTE Lift-Out capability not applicable to Independent Unit. revised -7
Optional 6mm MicroSpan Chain An additional type of MicroSpan chain is available for the independent units. 6mm Raised Top Chain (right, and top of next page) is more than twice as strong as the standard 4mm chains. 6mm Chain 6mm Nose Bar 18mm (.71 ) MicroSpan 6mm Raised Top FLOW Also Available 6mm Flat Top MicroSpan chain is now also available as an option. MicroSpan 6mm Flat Top FLOW 11 revised -7
Determining Transfer Shaft RPM The following simple formula can be used to calculate the Transfer shaft input RPM necessary in order to achieve a desired Transfer conveyance (chain) speed. This formula is applicable to both geardriven and roller-chain-driven units. FORMULA FOR U. S. STANDARD UNITS (FEET PER MINUTE) Transfer Shaft Input RPM = Target Chain Speed (fpm) x 1.38 FORMULA FOR METRIC UNITS (METERS PER MINUTE) Transfer Shaft Input RPM = Target Chain Speed (m/min) x 4.38 Example: Suppose that your target conveyance speed for the MicroSpan Transfer is 6 feet per minute. Plugging this value into the above formula yields the equation: Transfer Shaft Input RPM = 6 x 1.38 Transfer Shaft Input RPM = 83 RPM So, the MicroSpan Transfer s drive shaft would need to turn at 83 RPM in order to drive the Transfer chain at 6 feet per minute. Sprocket / Pitch Formula In order to drive a MicroSpan Transfer from a conveyor using roller chain, use the formula below: R S1 RS2 = (.37) x D C R S1 = Pitch Radius of Sprocket/Gear attached to conveyor R S2 = Pitch Radius of Sprocket/Gear attached to Transfer Drive Shaft D C = Pitch Diameter of the Conveyor Drive revised -7 12
MicroSpan Features Gearmotor-Powered Unit There are many possible applications for a MicroSpan Transfer where a slave-driven unit is not an option. For these applications, SpanTech offers a completely independent gearmotorpowered Transfer (right). This approach allows the Transfer to be added to existing equipment, while using electrical power to drive the unit. This design is also useful where a variable speed feature is required. Gaps can be pulled, for example, in an incoming accumulated row. Gearmotor MicroSpan Transfer Available Speeds The gearmotor-powered unit comes standard with an SEW Eurodrive WS Series gearmotor. These motors are available with a wide variety of gear ratios and output speeds to suit specific applications (see table at right). The use of a Variable Frequency Drive can provide a still greater level of speed control. The WS Series motors also feature hypoid gear technology that offers excellent stop/start cycle capability. Transfer Speed @6Hz Motor RPM Gear Ratio Motor Type (SEW).8 fpm (3.3m/min) 1 7. : 1 DT71D6 13. fpm (3.9m/min) 18 6. : 1 DT71D6 16.6 fpm (.m/min) 23 7. : 1 DT71C4 2.2 fpm (6.1m/min) 28 39. : 1 DT71D6 2.9 fpm (6.4m/min) 29 6. : 1 DT71C4 24. fpm (7.m/min) 34 32. : 1 DT71D6 26. fpm (7.9m/min) 36 48. : 1 DT71C4 28.9 fpm (8.8m/min) 4 27. : 1 DT71D6 31.8 fpm (9.7m/min) 44 39. : 1 DT71C4 32. fpm (9.9m/min) 4 24. : 1 DT71D6 38.3 fpm (11.7m/min) 3 32. : 1 DT71C4 4.4 fpm (12.3m/min) 6 19. : 1 DT71D6 4. fpm (13.9m/min) 63 27. : 1 DT71C4 48.4 fpm (14.7m/min) 67 16. 33 : 1 DT71D6. fpm (1.4m/min) 7 24. : 1 DT71C4.6 fpm (16.9m/min) 77 14.33 : 1 DT71D6 63. fpm (19.3m/min) 88 19. : 1 DT71C4 7.8 fpm (23.1m/min) 16.33 : 1 DT71C4 77.3 fpm (23.m/min) 7.2 : 1 DT71D6 86.6 fpm (26.4m/min) 12 14.33 : 1 DT71C4 96.8 fpm (29.m/min) 134 8.2 : 1 DT71D6 121.3 fpm (37.m/min) 168.2 : 1 DT71C4 11.6 fpm (46.2m/min) 2 8.2 : 1 DT71C4 13 revised -7
Product Specifications all Transfer Models Maximum Load and Torque Ratings 4 3 2 3 2 2 1 2 2 1 7 revised -7 4MM FLAT TOP CHAIN 3.4 THROUGH 11.81 WIDTHS 14 18 12 21 14 26 3.4 4.72.9 7.9 8.27 9.4.63 11.81 4 3 Max. product load (lbs) @ fpm Max. product load (lbs) @ fpm 13 7 14 8 17 3.4 4.72.9 7.9 8.27 9.4.63 11.81 Max. product load (lbs) @ 1 fpm 8 4 12 Torque (in-lbs) 3.4 4.72.9 7.9 8.27 9.4.63 11.81 14 17 Torque (in-lbs) Torque (in-lbs) 6 14 7 3 2 16 U.S. STANDARD UNITS 19 11 8 34 23 19 21 12 9 38 2 2 24 14 42 28 22
Maximum Load and Torque Ratings METRIC UNITS 12 8 6 4 2 8 7 6 4 3 2 1 4 3 2 1 4MM FLAT TOP CHAIN 9MM THROUGH 3MM WIDTHS.8 9. 8.6 7.7 6.3.4 4. 4.7 4.3 3.7 3.1 3.4 2.9 2.4 1.6 1.9 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm 1.8 1 1.2 Max. product load (kg) Torque (N-m) @ 1 m/min ( fpm) Max. product load (kg) Torque (N-m) @ 3 m/min ( fpm).4. 4. 3.6 3.1 3.1 2.8 2.2 2. 2.2 1.9 1.6 1.4 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm Max. product load (kg) Torque (N-m) @ 4 m/min (1 fpm) 4. 4.1 3.6 3.1 2.7 2.2 2.4 2.2 1.8 2. 1.8 1.6 1.3 1.4 1.1.9 6.3 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm 1 revised -7
Maximum Load and Torque Ratings U.S. STANDARD UNITS 4 3 3 2 2 1 3 3 2 2 1 2 2 1 6 4MM RAISED CHAIN 3.4 THROUGH 11.81 WIDTHS Max. product load (lbs) Torque (in-lbs) @ fpm 38 34 31 28 23 21 19 19 17 16 1 12 12 8 3.4 4.72.9 7.9 8.27 9.4.63 11.81 Max. product load (lbs) Torque (in-lbs) @ fpm 31 29 26 22 2 16 1 16 13 13 11 11 8 6 3.4 4.72.9 7.9 8.27 9.4.63 11.81 Max. product load (lbs) @ 1 fpm Torque (in-lbs) 2 18 16 24 22 4 4 11 12 7 8 9 11 revised -7 1 3.4 4.72.9 7.9 8.27 9.4.63 11.81 16
Maximum Load and Torque Ratings 8 6 4 2 8 7 6 4 3 2 1 4 3 2 1 2.7 2.2 1.4 4MM RAISED CHAIN 9MM THROUGH 3MM WIDTHS Max. product load (kg) Torque (N-m) @ 1 m/min ( fpm) 3.6 1.7 1 1.3 1.4 4. 2.2 1.8.4 2.6 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm 2.7 3.6 4. 2.3 6.8 Max. product load (kg) Torque (N-m) @ 3 m/min ( fpm) 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm. Max. product load (kg) Torque (N-m) @ 4 m/min (1 fpm) 1.8 1.2 2.2 1.4 3.1 1.8 3.6 3.1 2. 2. 7.7.9 4.1 3.4 2.8 2.1 METRIC UNITS 8.6 6.8 4. 3.8 3.2 2. 9. 7.2. 4.2 3. 2.7.4.4 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm 17 revised -7
Maximum Load and Torque Ratings U.S. STANDARD UNITS 18 1 12 9 6 3 16 12 8 4 1 12 9 6 3 16 revised -7 4 6MM RAISED CHAIN 3.4 THROUGH 11.81 WIDTHS Max. product load (lbs) @ fpm 22 7 27 86 Torque (in-lbs) 33 2 3.4 4.72.9 7.9 8.27 9.4.63 11.81 1 Max. product load (lbs) @ fpm 48 2 64 24 78 29 92 3.4 4.72.9 7.9 8.27 9.4.63 11.81 Max. product load (lbs) @ 1 fpm 64 4 4 4 36 28 32 24 16 2 12 3.4 4.72.9 7.9 8.27 9.4.63 11.81 18 38 Torque (in-lbs) Torque (in-lbs) 78 34 12 8 9 44 39 136 124 4 49 44 12 138 114 4 49 168 12 126
Maximum Load and Torque Ratings METRIC UNITS 6MM RAISED CHAIN 9MM THROUGH 3MM WIDTHS 2 2 1 7.2 Max. product load (kg) Torque (N-m) @ 1 m/min ( fpm) 6.2. 7.8 12.2 9.8 1. 11.6 17.2 13.6 2. 1. 22.2 17.2 24. 18.8 2 2 1 2 1 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm 6.8 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm.4 Max. product load (kg) Torque (N-m) @ 3 m/min ( fpm).4 9. 7..9 8.8 13.1.4 Max. product load (kg) Torque (N-m) @ 4 m/min (1 fpm) 4.6 7.2 6. 9. 7.2.9 8.8 1.4 12.7 12.2.2 17.7 14. 13.8 11.4 2. 16.3 1.6 12.8 22.2 18.1 17. 14.2 9mm 12mm 1mm 18mm 2mm 24mm 27mm 3mm 19 revised -7
MicroSpan Chain Widths MicroSpan chain stock is 3mm (11.81 ) wide, and is cut to width on a conventional table saw. Span Tech uses a special blade, but conventional carbide-tipped wood blades can also be used. A top piece is used to hold down the chain and ensure a smooth cut. SpanTech uses a power feeder for additional safety and convenience. Chain Chain The chain can be cut to widths starting at 9mm (3.4 ) and increasing in 1mm (.9 ) increments. Effective chain widths greater than 3mm can be achieved by combining the 3mm (11.81 ) chain with an additional chain (9mm [3.4 ] shown as example, below). A 2mm (.8 ) gap is provided between the two chain widths. See also pages 2 and 21. 3mm 2mm 9mm In this way, a given facility can have many different MicroSpan conveyor widths, all made with the same convenient, single-width product. Metric 9mm mm 12mm 13mm 1mm 16mm 18mm 19mm 2mm 22mm 24mm 2mm 27mm 28mm 3mm English 3.4 4.13 4.72.31.9 6. 7.9 7.68 8.27 8.86 9.4.4.63 11.22 11.81 revised -7 2
Transfer Width vs. Conveyor Width Since MicroSpan Chain is provided in a standard stock width of 3mm, Transfers in excess of 3mm wide utilize multiple sections of MicroSpan chain. As shown on the previous page (see graphic), engineering rules provide a 2mm gap between adjacent sections of MicroSpan chain. Therefore, an extra 2mm of total Transfer chain width must be considered for each 3mm increment exceeded. This factor is displayed in the chart shown below. The righthand column shows the total edge-to-edge width of the MicroSpan Chain including the 2mm gap(s) that would correspond to the MultiSpan conveyor standard widths (shown in the lefthand column). See also graphic on next page. MultiSpan Conveyor Chain Width MicroSpan Transfer Chain Width Extra Width (Standard Widths) (Edge to Edge) 9.6 mm mm 9. mm 12.6 mm mm 12. mm 1.6 mm mm 1. mm 18.6 mm mm 18. mm 21.6 mm mm 2. mm 24.6 mm mm 24. mm 27.6 mm mm 27. mm 3.6 mm mm 3. mm 33.6 mm 2. mm 332. mm 36.6 mm 2. mm 362. mm 39.6 mm 2. mm 392. mm 42.6 mm 2. mm 422. mm 4.6 mm 2. mm 42. mm 48.6 mm 2. mm 482. mm 1.6 mm 2. mm 12. mm 4.6 mm 2. mm 42. mm 7.6 mm 2. mm 72. mm 6.6 mm 2. mm 62. mm 63.6 mm 4. mm 634. mm 66.6 mm 4. mm 664. mm 69.6 mm 4. mm 694. mm 72.6 mm 4. mm 724. mm 7.6 mm 4. mm 74. mm 78.6 mm 4. mm 784. mm 81.6 mm 4. mm 814. mm 84.6 mm 4. mm 844. mm 87.6 mm 4. mm 874. mm 9.6 mm 4. mm 94. mm 93.6 mm 6. mm 936. mm 96.6 mm 6. mm 966. mm 99.6 mm 6. mm 996. mm 2.6 mm 6. mm 26. mm.6 mm 6. mm 6. mm 8.6 mm 6. mm 86. mm 111.6 mm 6. mm 1116. mm 114.6 mm 6. mm 1146. mm 117.6 mm 6. mm 1176. mm 12.6 mm 6. mm 126. mm 123.6 mm 8. mm 1238. mm 21 revised -7
MicroSpan Transfer Dimensions & Specifications 2. (.8mm) 4-13/16 (122.7mm) MultiSpan Conveyor Chain Width (standard widths) Top View MicroSpan Chain (3mm stock width) MicroSpan Chain (add l width) MicroSpan Transfer Chain Width (total - edge to edge) 2mm gap between chain sections Front View revised -7 22
STANDARD SPROCKET LAYOUT 9MM (3.4 ) THROUGH 3MM (11.81 ) S 1mm (.9 ) typical (3.4 ) (4.13 ) (4.72 ) (.31 ) (.9 ) (6. ) (7.9 ) (7.68 ) (8.27 ) (8.86 ) (9.4 ) (.4 ) (.63 ) (11.22 ) (11.81 ) 23 revised -7
SpanTech LLC 111 Cleveland Avenue P. O. Box 369 Glasgow, KY 42142 (27) 61-9166 general_info@spantechllc.com www.spantechllc.com revised -7 24