ALUMINIUM MOTION GUIDANCE SYSTEMS TECHNICAL INFORMATION:
PARALLELISM
The system should be aligned in the following 3 directions in order to ensure the travel life is not reduced.
Parallelism of the rails 
The following table shows the tolerances for aligning the rails and carriages.
P1 values (mm) for: |
||
Size |
Normal |
Preloaded |
15 |
0.020 |
0.008 |
20 |
0.026 |
0.010 |
25 |
0.031 |
0.014 |
Height Alignment (lateral)
The permissible vertical offset, S (mm), is given by S = a f , where a is the distance between the guide rails and f is the calculation factor (see below).
Calculation Factor |
Normal |
Preloaded |
f |
0.0012 |
0.00035 |
Height Alignment (longitudinal)
The permissible offset along the rail is given by R = b g , where b is the distance between the carriages (see left) and g is the calculation factor (see below).
Calculation Factor |
Standard |
Preloaded |
g |
0.0006 |
0.00021 |