Low braille quality on some hammers
In order to test your braille quality and further identify any service needs for your V4 embosser you may conduct a Hammer Test by pressing Help + Help on the embosser interface panel.
A hammer test (solenoid test) will emboss showing a number of the hammer's by hammer number. As seen in the example image below, this test reflects a faulty hammer test outcome showing that hammer number 6 prints the braille dots weakly.
If your hammer test gives results similar to the faulty hammer test picture above you may need to adjust your hammer to the correct position (not tilted) or replace the hammer.