The ornamental design for a scanheadassembly, as shown and described.
FIG. 1 is a perspective view of the scanhead assembly.
FIG. 2 is a front view of the scanhead assembly of FIG. 1
FIG. 3 is a back view of the scanhead assembly of FIG. 1.
FIG. 4 is a left side view of the scanhead assembly of FIG. 1.
FIG. 5 is a right side view of the scanhead assembly of FIG. 1.
FIG. 6 is a top plan view of the scanhead assembly of FIG. 1; and,
FIG. 7 is a bottom plan view of the scanhead assembly of FIG. 1.
The broken lines in the drawings are included for the purpose of illustrating portions of the scanhead assembly that form no part of the claimed design.