Additional font Datamax DMX-I-4212 Label Printer

SOURCE: Datamax I-CLASS DMX-I-4212

Printer ribbon has a wrinkle and it transfers to the label in the form of a blank line accross the ribbon.

SOURCE: datamax dmx-m-4206

check for the flatness of the printhead across the platen.
also check to see if the head is not worn(will be white colored at the head heat elements.
also check to see if the platen is severly worn.

SOURCE: We can not use our print DATAMAX DMX M CLASS

What type of stock are you using? Gapped, continuous, or reflective mark?
If you are using a standard gapped stock, and the stock is loaded in the printer and ready, press the feed button until 3-6 labels are passed beneath the media sensor.

If you are using reflective (eyemarked stock) go in the the media settings. Change the sensor type to reflective.
Make sure that the eyemark is presented to the sensot at the small white strip on the sensor. Do not move the sensor to a place where the sensor will see anything but the mark.

SOURCE: wrinkles in ribbon using Datamax H-4212 printer

Definitely. possible solution match the width of your label and ribbon. if your ribbon is wider for .5 inch it should be good.
1. check your spindle alignment, printhead alignment and rotate the green knob on the printhead while printing so that you'll see the difference.

SOURCE: HELLO!! MY EQUIPMENT IS DATAMAX DMX-1-4212 AND TO

poor tension on the rollers?

try pulling the ribbon during stamping, if this corrects it then you may need a tech to come and reseat some drive gears.