359 [Step 1] Setting the Required Design Conditions (1) Machine Type (2) Power Transmission (3) Load Variances (4) Operation Duration per Day (5) Small Pulley Rotational Speed (6) Rotation Ratio (Lg. Pulley # of Teeth / Small Pulley # of Teeth) (7) Shaft Center Distance (Interim) (8) Pulley Diameter Limitation (9) Other Usage Conditions [Step 2-a] Calculating Design Power……MXL/XL/L/H/S_M/MTS_M/T Series t%FTJHO 1PXFS 1E 5SBOTNJTTJPO 1PXFS 1U Y 0WFSMPBE 'BDUPS ,T ∙ Calculate Transmission Power at Motor Rated Power Output. (It is ideal to calculate from the actual load applied to the belt.) ∙ Overload Factor (Ks)=Ko+Kr+Ki Overload Factor (Ks)=Lo+Kr+Ki i. If the maximum torque is used once or twice per day, calculate the design power by assigning "the load correction factor (Ko) = 1.0" to the expression for the overload factor and then, by multiplying the maximum torque by the overload factor (Ks) derived from the said expression. ii. If the maximum torque is used very often, calculate the design power by multiplying the maximum torque by the applicable overload factor (Ks). <For Timing Belts based on Linear Drive> Calculate the design power by using the following expressions. Te=mx! Pt=TexV/1000 Pd=PtxKs <For Timing Belts based on Spindle Motor> Calculate the design power by calculating the transmission power from the basic rotation speed and then, by multiplying it by the applicable overload factor (Ks). Te : Effective Tension (N) m : Mass (g) ! : Acceleration (m/sec2) V : Belt Speed (m/sec) Pt : Transmission Power (KW) Pd : Design Power (kW) Ks : Overload Factor Ko : Overload Correction Factor (Table 1) Kr : Rotation Ratio Correction Factor (Table 2) Ki : Idler Correction Factor (Table 3) * When converting the torque (Tq) into transmission power (Pd), calculate the applicable values by using the following expressions. Torque (Tq) = tqxKs Transmitting Power (Pd) = Tqxn/9550 Tq : Design Torque (N·m) tq : Transmission Torque Ks : Overload Factor Pd : Design Power (kW) n : Speed (rpm) Table 1. Load Correction Factor (Ko) Typical Machines Using a Belt Motor Max. Output not Exceeding 300% of Rated Value Max. Output Exceeding 300% of Rated Value AC Motor (Standard Motor, Synchronous Motor) DC Motor (Shunt), Engine with 2 or More Cylinders Special Motor ( High torque), Single-Cylinder Engine DC Motor (Series), Operation with Lye Shaft or Clutch Operation Hours Operation Hours Intermittent use 1 Day 3 to 5 hrs Regular Use 1 Day 8 to 12 hrs Continuous Use 1 Day 8 to 12 hrs Intermittent use 1 Day 3 to 5 hrs Regular Use 1 Day 8 to 12 hrs Continuous Use 1 Day 8 to 12 hrs Exhibit Instrument, Projector, Measuring Instrument, Medical Machine 1.0 1.2 1.4 1.2 1.4 1.6 Cleaner, Sewing Machine, Office Machine, Carpentry Lathe, Belt Sawing Machine 1.2 1.4 1.6 1.4 1.6 1.8 Light Load Belt Conveyor, Packer, Sifter 1.3 1.5 1.7 1.5 1.7 1.9 Liquid Mixer, Drill Press, Lathe, Screw Machine, (Circular Sawing) Machine, Planer, Washing Machine, Paper Manufacturing Machine (Excluding Pulp Manufacturing Machine), Printing Machine 1.4 1.6 1.8 1.6 1.8 2.0 Mixer (Cement and Viscous Matter), Belt Conveyor (Ore, Coal and Sand), Grinder, Shaping Machine, Boring Machine, Milling Machine, Compressor (Centrifugal), Vibration Sifter, Textile Machine (Warper and Winder), Rotary Compressor, Compressor (Reciprocal) 1.5 1.7 1.9 1.7 1.9 2.1 Conveyor (Apron, Pan, Bucket and Elevator), Extraction, Fan, Blower (Centrifugal, Suction and Discharge), Power Generator, Exciter, Hoist, Elevator, Rubber Processor (Calender, Roll and Extruder), Textile Machine (Weaving Machine, Fine Spinning Machine, Twisting Machine and Weft Winding Machine) 1.6 1.8 2.0 1.8 2.0 2.2 Centrifugal Separator, Conveyor (Feed and Screw), Hammer Mill, Paper Manufacturing Machine (Pulpapitor) 1.7 1.9 2.1 1.9 2.1 2.3 ETypical machines using a belt are listed above. For other machines using a belt, a load correction coefficient should be determined by reference to this table. EIn the case of starts / stops over 100 times per day or rapid acceleration / deceleration, check the above values multiplied by 1.3. (MTS_M only) Timing Belt Selection ofTransmissionTiming Belts 1
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