|A control knob moves too easily, making it difficult to set it to a desired position.||Looseness of the knob.||
Adjust the tension of the knob.
|A set position descends by itself in the Z-axis.||Loose tension of the control knob causing the drive unit to descend by itself.|
|A control knob moves too easily, causing it to go out of position.||Clearance between the knob and the bearings widened.|
|A control knob became dislodged.||Looseness of the set screw or excessive rotation of the knob.||
Reattach and adjust the knob. Adjust the tension of the knob.
|Turning the control knob does not allow the drive unit to move.||Find any obstacle getting in the way of the drive unit?||Ensure that no obstacle gets in the way of the drive unit.|
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