When random ticks, accents and so on show up in the printed output of a daisy
wheel printer, there are two probable causes:
1. The printwheel is bad. If the spokes of a printwheel were either poorly
manufactured or subsequently bent, then the hammer may strike two spokes at
a time. If the same letters are always printing poorly, then it is likely
that the printwheel is at fault.
2. The stepper motor and the hub where the printwheel mounts are out of sync.
To check this, print vertical lines using the vertical bar character and
horizontal lines using the underscore character. If the characters are not
vertical or horizontal and the lines are broken, then the alignment is
off.