Fusion3 Design F306 Generation I, Руководство по эксплуатации

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Figure 55: Moving the Z Axis by Hand
While you are doing this, watch for these things:

The resistance of the belt to your movement should be consistent. You should not feel more than a small
amount of “lumpiness” as the leadscrews rotate.

The Z axis should not bind or suddenly become hard to move at any point. More resistance at the bottom
of its range of travel is normal, with a gradual decrease as the bed moves up.
With the bed at the top of its travel, check the distance from the top of the adjacent beam to the steel plate near
each leadscrew. This is easiest to do with calipers, as shown in the picture, but can be done with an accurate ruler
such as a steel measuring scale. Do not measure this with a tape measure since the end of most tape measures
can introduce measurement error. The distance should be equal within 2 mm of each other (less than 0.1 inches).