Three Checks before Printing
On this machine, ink affixed on the surface of the print heads might be cured by the reflection of the UV-LED lamp light and by ink mist (ink splashing during printing). If ink affixed on the surface of the print heads is cured, dot drop-outs may occur. Continued use of the product in this state may cause a failure that requires the replacement of the print heads.
While daily cleaning is important to prevent dot drop-outs, there are also three important points to check before printing.
1. Do not use objects that easily reflect light.
Materials that are likely to reflect the UV-LED lamp light, such as mirrors and stainless steel, promote the curing of the surface of the print heads and therefore cannot be used as the object to be printed on.
2. Shorten the distance to the print heads.
) and the surface of the object to be printed on (
) increases, the likelihood of ink mist increases. When setting the height of the object to be printed on manually, make the distance as short as possible. When the height (
) is automatically set, the distance is about 1 mm (39.4 mil).
3. Consider whether a jig is necessary.
As the distance between the object to be printed on and the print heads increases, the likelihood of ink mist increases. Therefore, a jig might be required according to the size and shape of the object to be printed on. Prepare a jig if one of the following conditions is met.
- With just the object to be printed on, no margins can be obtained in the areas 40 mm (1.58 in.) to both the right and left of the portion (width) of the data to be printed.
Print heads 
Data area Object to be printed on 
Margin: 40 mm (1.57 in.) or more Jig 
Less than 2 mm (78.7 mil) in height difference from the actual print surface
- The variation in height of the surface of the object to be printed on is 2 mm (78.7 mil) or more.
Print heads Data area Object to be printed on Margin: 40 mm (1.57 in.) or more Jig Less than 2 mm (78.7 mil) in height difference from the actual print surface
- With just the object to be printed on, no margins can be obtained in the areas 40 mm (1.58 in.) to both the right and left of the portion (width) of the data to be printed.
When considering a jig, also consider that a hole will be drilled in the jig and the head refresher will be attached on top of the jig. This affects the work efficiency of head refreshing and the print quality.
Objects to be printed on with thickness up to 100 mm (3.9 in.) can be loaded on the LEF2-300. However, if the jig thickness is 55 mm (2.2 in.) or more, the installed height of the head refresher will exceed 100 mm (3.9 in.), which is outside the height adjustment range of the head refresher. In this situation, it is necessary to remove the jig before performing head refreshing.
Objects to be printed on with thickness up to 200 mm (3.9 in.) can be loaded on the LEF2-300D. However, the jig thickness varies depending on whether the spacer table is used. When using the spacer table, the thickness is the same as that of the LEF2-300. When not using the spacer table, ensure that the jig thickness is 155 mm (6.1 in.) or less.
- Head refresher standard position
Print heads Head refresher Object to be printed on
- Jigs for which head refreshing is possible with the jig installed
Print heads Jig that can be used by changing the height of the head refresher Jig that can use the head refresher in the standard position When using the spacer table with the LEF2-300D, LEF2-300: 55 mm (2.2 in.) or less
When not using the spacer table with the LEF2-300D: 155 mm (6.1 in.)
- Jigs for which head refreshing is not possible with the jig installed
Jig that is taller than the head refresher Jig that makes the head refresher installation position 55 mm (2.2 in.) or 155 mm (6.1 in.) or more higher than the standard position
- Head refresher standard position