This ServoBelt is a variant that has the bearing rails attached on adjacent faces of the Bosch extrusion. It is adjusted to track a straight line in the Y-axis to within +/-.0002" when up on edge, used as the bridge in a gantry setup. Since we are operating within the dimensional limits of an extruded beam, this bearing mounting allows us to tune in one axis perfectly, so in this case, the customer needed dead straight in Y axis (along this beam), and the Z axis then is limited, but still, amazingly within .002". Sealed encoders are used as this is a laser cutting gantry.
Next time, I think we will pitch the customer on Renishaw magnetic encoders. It will be far less expensive than the Heidenhain sealed glass scales, which were selected solely for the environment.
