Model AZ Timing Belt Drives for Positioning Applications
Technical Information
Design of the Z-drives
Contents:
| F (N) | = | required side thrust |
| Fx1) (N) | = | side thrust of the timing belt drive |
| m (kg) | = | total mass to be moved |
| a (m/sec2) | = | acceleration |
| FR (N) | = | frictional loss |
| Si | = | safety factor 1.2 ... 2 |
| g (m/sec2) | = | acceleration due to gravity (9.81 m/sec2) |
| mN (kg) | = | payload |
| mS1) (kg) | = | own mass of the carriage |
| Md (Nm) | = | required drive torque |
| d01) (kg) | = | effective belt pulley diameter |
| M01) (kg) | = | idling torque |
| 1) Value to be taken from the technical data | ||
The timing belt drive to be selected must have a maximum permissible side thrust which is greater than the calculated value.
F < FX
If the available side thrust is too low, either a larger timing belt drive must be selected or the acceleration or deceleration time must be increased.
Horizontal application:
F = (m a + FR)·Si
Vertical application
F =( m·a+ FR + m·g)·Si
m = ms + mN
FR = m · g · coefficient of friction1)
No safety allowance is made for a possible belt rupture in vertical installations. The load can drop in an uncontrolled manner. Danger of injuries!
LGes = stroke + width of carriage + end frames + safety allowance.
Stroke = max. working range.
Max. travel = stroke + safety allowance (standard = 20 mm, different lengths on request of the customer).
Note:
The required braking or acceleration distances are a part of the stroke.
