Zeta Alignment Issue
If a customer contacts support with an issue that their units are milling with missing margins or missing anatomy. One of the possible issues could be the Zeta Alignment.
The Zeta Alignment is the position of a unit inside a disc relative to its vertical position. The correct alignment should be calculated based off its median. This is the midline of the unit so that the unit is equal distance from either side of the disc.
Correct Zeta Alignment should look like this. This is a proper alignment to the median.
If a unit is mis-aligned to its Maximum Zeta, it will look like this. This would result in a unit wiith missing margins.
If a unit is mis-aligned to its Minimum Zeta, it will look like this. This would result in a unit missing its occlusal anatomy.
To correct a mis-aligned Zeta Alignment, you must first have Sum3D running. Next you will click the Zeta Align Button.
Once clicked, a menu will display on the screen that looks like this.
To adjust the Zeta Alignment, we will change the Alignment Type field. Click the down arrow to the right of the field to select from one of the options.
To return the units to the correct alignment, we will select the option Align the median Z. Once selected click the Ok button. This will correct the alignment of all units in the current disc. The units will now be aligned correctly to the median of the teeth and will look like this.