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Depending on the series, NTN-SNR – Linear Axis, can be be produced with toothed belt drive, screw drive, rack and pinion drive or
linear motor drive.
The adjustment of the toothed belt tension for NTN-SNR – Linear
Axis is done by a radially moveable deflecting pulley (Figure1.15).
Toothed belt drive
Linear Axis with toothed belt drive are suitable for fast handling and positioning applications. All axis are equipped with AT or STD toothed
belt. These are extruded polyurethane belts with integrated steel cords. The AT toothed belts are carried out in the zero-gap shape.
The use of black toothed belts prevents discoloration of the toothed belts under UV - radiation. These toothed belts are also characterized
by the following properties:
• Low wear
• Maintenance free
• High tensile strength and low elongation
• High precision – Pitch error ± 0,2mm/m
• UV – resistant
• Temperature range -25°C to +75°C, special version for use below -25° possible
• Low noise level
• Versions with approval for the food industry
1.2
Driving systems
Figure 1.14 __ Toothed belt clamping
Figure 1.15 Toothed belt tension
The special design of the toothed belt clamping via toothed
segments (Figure 1.14) allows an unweakend clamping of the belt.
The setting of the correct toothed belt tension is made by a NTN-SNR - measuring device with which the exact tension will be adjusted
with the help of a force sensor (Figure 1.16).
Thus, there is no risk of overloading of the toothed belt or the
failure of the pulley bearing due to excessive toothed belt tension.
Furthermore, optimum driving characteristics by a centered
alignment and low wear are ensured.
Advantages of toothed belt axis
•
High dynamic
•
Great lengths realizable
•
Cost efficient
•
Maintenance free drive element
Figure 1.16 __ Measuring device for the toothed belt tension
Summary of Contents for AXC100Z
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Page 242: ...240 Notes ...