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In UV printing initial curing and polymerization give around 70% of the mechanical resistance, but secondary polymerization may last up to 24 hours after printing. If the lamps are old (and therefore weak), the ink won't get enough light to cure correctly (especially the layer closer to the...

Even if it's true, question is, why there's too much yellow? And maybe there's not enough black? Did you try to print solids of the pure CMYK colours to see, if there's no problem with the ink delivery, weak heads and so on?

Maybe some of your profiles are CMYK only, without light C and light M? Do you have separate profiles for 700 and for 550?

According to the Oce's Technical Service Manual HD prints have no ship print or quality viewing specification. It's best suited for images with a lot of text or fine lines. The optimal resolution requires uni-directional printing. I suppose that the HD print was made bi-directionally. The...

Well, RMO requires some compromises and can't be compared with the R2R printer (designed to be R2R). Viewing distance is a parameter considered during the print mode selection.

Wrong calibration. To be checked by the technician...

Where is no encoder? In the Z-axis (carriage height)? Indeed - there are two encoders, but not linear. They are integrated with the Z-axis motors (located at the top of the motor). Each Z-axis motor has two cable connections - one is for the power (to the PBA Z-axis motor driver) and another one...

Wrong. The light on the encoder shows its status. It can be green, orange or red. Green means the encoder reads the strip correctly, orange means that the reading is at the edge of the accepted level and red means that the encoder read head cannot read the strip. The third option may be the...

If you have one hybrid machine and it's down (for any reason), you have a problem. Having two separate devices you are able to work anyhow.

In the past, Fujifilm had in offer OCE's Arizona branded as Acuity. Now Fujifilm sells its own models of flatbed printers (Acuity Prime), check them out.

Usually, in big printers many different power sources are used to generate many different voltages (i.e. +5, +12, +24 etc.). Maybe any of the power supplies? Or a fuse?

Set the voltage of the head to 0V, this will prevent from firing the ink drops. But first, note the exact value of the voltage and after your tests set it again to the noted value.

Another problem is the XP600 is (like many others) a head with a variable drop size (minimum drop is 1.5 pl, maximum is 21 pl). The decision, on how to form the final size of the drop is made in the printer's electronic and depends on the head type (so the boards working with XP600 won't work...

Printhead comparison won't help you much - it's not easy to change the printheads to a different type. You need to change the ink supply system, electronic boards and firmware which drives the heads. Another problem is that the heads themselves have different shapes, mountings and so on. I doubt...

Dimatix heads are very robust and can survive a lot of issues. Many old printers using these heads (i.e. Inca Spyder and further Inca models) are still in usage and rarely available on the market.

Is it the same after 24 hours after printing? UV inks needs sometimes some time after the curing to get the full resistance (due to the secondary polymerisation). If you use white ink, which is not original, it may not be precisely fitted to the machine you use. Definitely original white ink...

The exact percentage where the full colour replaces the light version depends on the ICC profile, so it depends on the inks, printer, type of heads, RIP software and so on.

Maybe it is possible to print a line using only the light colour easier - looking at the picture above (a transition curve between light and full colour) you can find out, which percentage of the final colour contains only the light. Then set the strength of the printed line to that value and...

If the printer will be idle for 15 to 30 days, here is the procedure: Remove or rewind any media from the RMO (if present) Turn off lamps Perform printhead maintenance when ink temperature is at least 40° Centigrade -104° Fahrenheit) Swab printheads (Don't perform printer maintenance after...

Z-axis encoders are integrated with the motors at both ends of the carriage (they are rotary encoders, not linear). It would be good to enter the SDS menu and compare readings from both encoders, but the service key is required. Very often a reason for the Z-axis errors is a small plastic...