Preventing problems with dot matrix printers

• Make sure the print head has enough free air around it to dissipate heat. Do not place other electronics too close to it.

• Use good quality ribbons. The cheap ones may use ink that lacks needed lubricants or uses an acid that can hurt your print head over time.

• Do not turn the platen head using the knob when the printer is on. This can damage the stepper motor. A system administrator may wish to use the knob when first loading a new box of paper and then remove it from the machine.

• Dot matrix printer ribbons will dry out eventually if they are not used.

• Some dot matrix printers do not have the strength of impact to deal effectively with multi-part forms.

• Check with the Seiko Epson Corporation before trying to replace the print head on its older dot matrix models. Some of these routinely burned out the main circuit board when the print head failed.

• It is often cheaper to get a standard stepper motor from a local electronics store than to order it by part number from the printer's manufacturer.

• A dot matrix printer has more control of its dot placement up-and-down than right-to-left. Its right-to-left motion is precise to 1/216th of an inch. Vertical spacing is accurate to 1/240th. This will effect the appearance of detailed graphics.