One of the scriber's arms holds the pen or the pencil, and the other two
arms have tracer points. The tail pin moves along the straight groove
on the template, while the tracing pin moves in the engraved characters
on template (figure 171). When you move the tracing pin around the
contour of a character on the template, the entire scriber hinges on the
tail pin in the groove on the template, and the pen or pencil duplicates
the character you traced on the drawing surface.
The scriber has an adjusting screw next to the pen point (figure 171).
The adjusting screw controls how much pressure or contact the pen point
makes on the drawing surface. You set the adjusting screw so the tip of
the cleaning pin just contacts the drawing surface. If the pen point
exerts too much pressure on the drawing surface, the pen grooves the
drawing surface and too much ink flows from the pen. The letters also
have a tendency to run and smear. Additionally, you can adjust the
slant of the characters up to 22 1/2 by adjusting the scriber's tracer