Drive calculation GUIDELINES Pulleys It is recommended to use pulleys with the maximum diameter allowed by the application in order to maximise the number of teeth in mesh and increase the belt peripheral speed. For applications where high positioning precision is required, it might be useful to use zero backlash pulleys. In order to guarantee a reliable drive, it is recommended to use superior quality pulleys. Minimum pulley diameter Minimum pulley diameter depends on belt construction but also on the load and the configuration of the drive. The values reported in the catalogue have been calculated...

BELT INSTALLATIONDrive installation When installing belts on pulleys, before tensioning the drive, check that the belt teeth and pulley grooves correctly match. Belt breaking load is highly dependent on several factors including pulley alignment, clamping system and others. The data given in the catalogue are average values tested in our laboratory. It is recommended to use adequate safety factors and ask the ELATECH® technical department for minimum guaranteed breaking load in applications where it is needed. Correct belt drive tension and alignment are very important to optimize belt life and...

online calculation software for quick and reliable drive calculation Elatech online drive calculation support at ↓ ELATECH’s ELADRIVE is a drive calculation program allowing efficient and time saving drive calculation with improved performances. ALWAYS UP TO DATE ELADRIVE online version is always up to date. › RELIABLE SOLUTIONS! FAST AND EASY ELADRIVE offers a step by step drive calculation by an easy to follow menu with improved screen layouts for quicker navigation. › SAVE YOUR TIME! COMPREHENSIVE APPLICATION RANGE Drive Calculation ELADRIVE offers a drive calculation for all application technology...

LINEAR drives calculation Definitions and transmission cycle In most cases linear drives may be taken back to one of the two layouts shown, where a specific system of forces acts. “OMEGA” drive v, a FTzul, FTv mc LINEAR drive A Transmission cycle (rpm/time) v ab Drive Calculation

[cm] Belt minimum width [N/mm] Belt modulus / spring rate [N] Specific spring rate [mm] Effective centre distance [mm] Outside pulley diameter [mm] Pitch circle diameter [mm] Idler pulley diameter [N] Dynamic shaft load [N] Static shaft load [N] Maximum span force [N] Resisting force of friction [N/cm] Specific tooth shear strength [N] Pretension force for belt side [N] Allowable tensile load [N] Vertical lifting force [mm] Difference of position due to force [mm] Length of tight and slack side [Nm] Torque during acceleration Specific weight Total mass Mass of carriage / slide Pulley mass Pulley...

Torque Power M _ Fu 'd w _ P' 9550 2000 n M • n FU • v 9550 _ 1000 Peripheral force Linear speed Fu = 60000•v z • t Acceleration time Acceleration travel tab Braking time Braking travel ‘av _ i _ Total travel Sges _ Sab + Sc + Sav Time at constant speed Travel at constant speedsc = v • tc • 1000 v • 1000 Safety factor ELATECH® belts do not need any safety factor. However if there are unknown peaks or shock loads or swings in the peripheral force unknown at design time, which therefore can not be included in the calculation parameters, a suitable safety factor should be considered by the designer....

Calculation Linear drives are correctly dimensioned when the total peripheral force, necessary for the requested work, satises the 3 technical parameters of the selected belt: ∙ tooth shear strength ∙ allowable tensile load ∙ exibility Determine the belt width with FUspez depending on the rpm of the small pulley (see technical data on tooth shear strength for the selected belt type). The necessary data for the calculation are: the mass to be moved, the transmission cycle, the drive layout with the related forces, the resisting force of friction. Friction force is generally determined by the linear...

Calculate shaft load The shaft load under static conditions is: Being FU the resulting force on the slide, the positioning deviation generated by belt elongation is: The shaft load under dynamic conditions is: FWdyn = 2 ⋅ FTV + FU Calculate necessary static elongation Installation tension generates a belt elongation “Δl” between the shafts (for linear drives) or the clamping plates (for “Omega” drives). Linear drive L1 Fu ,M Omega” drive v, a FTzul, FTv mc If the resulting elongation is not acceptable for the application, it is possible to reduce it by increasing the belt width or by increasing...

Power transmission drives ELA-flex SD® and iSync® Definitions lr [cm] Belt minimum width - Number of teeth of the belt [mm] Effective center distance [mm] Pulley bore diameter [mm] Pulley outside diameter [mm] Small pulley outside diameter [mm] Large pulley outside diameter [mm] Pulley pitch diameter [mm] Small pulley pitch circle diameter [mm] Large pulley pitch circle diameter [N] Static shafts load [N] Pretension force per belt side [N] Allowable tensile load Specific Torque Power Specific Power Acceleration time Deceleration time Peripheral speed Number of teeth of the small pulley Number...

Belt selection is made according to a constant working load. For start up torque and in case of peak loads and vibrations a safety factor c1 must be considered. Calculate teeth in mesh Transmission with steady load c1 = 1,0 Transmission with peak or fluctuating loads: For speed up driver factor c2 must be considered: i = from 0,66 to 1 c2 = 1,1 The resulting total safety factor is: c0 = c1 • c2 with p [°]= wrap angle t-(z9 - zk ) Determine belt width Note: zemax = 12 for belts ELA-Flex SD® or iSync® zemax = 6 for belts ELATECH® V Drive calculation The necessary data for drive calculation are:...

NoteSpecial pulley profile required.Contact Elatech® technical dept. for details. 183

NoteSpecial pulley profile required.Contact Elatech® technical dept. for details. 187