I assume you mean the frequency at which the head moves back and forth. If this happens only at a certain frequency, then it sounds as if that is caused by resonance - which happens when the excitation (in this case, the head moving back and forth) has a similar frequency to the object's (the printer's) natural frequency.
A variable that causes change in the output of a system. In a RC circuit, for example, the input V is the excitation variable
excitation
The major causes of loss of excitation on generators are due to an open circuit or a short circuit in the field winding. This may also be caused by a breakdown of the insulation system.
excitation
sdrg
Gene mutation causes the phenotype frequency in a population to change after each generation.
A variable that causes change in the output of a system. In a RC circuit, for example, the input V is the excitation variable
If you subtract from the carrier frequency the frequency of the tone that modulates it, then filter out the carrier frequency, then you have a lower sideband frequency. If you add to the carrier frequency, filter out the carrier, then you have an upper sideband frequency.
An electron changes energy levels within an atom when it absorbs or emits a specific amount of energy, typically in the form of light or heat. This process is known as electron excitation or de-excitation.
When the SEM's primary electron beam hits the specimen, it causes excitation of atoms in the specimen. This excitation leads to the emission of secondary electrons, backscattered electrons, characteristic X-rays, and Auger electrons, which are then detected by various detectors in the SEM for imaging and analysis.
suppl Frequency