Bi Uni Print Quality Differences ARTJET 2025

Bi Uni Print Quality Differences

If you use a UV Printer, you know the difference in quality between unidirectional and bidirectional printing.

Why? Let me explain why there is a difference in print quality.

 

I. Printing method _Bi Uni Print Quality Differences

 

1. Uni directional print _Bi Uni Print Quality Differences

When looking at the printer from the front,

When printing, the head carriage moves back and forth from right to left and left to right.

And, the head carriage moves back and forth along the Y axis, or the flatbed moves forward, little by little. This is called feed or feeding in inkjet.

The unidirectional printing method is as follows.

 

• The head carriage moves from right to left (or left to right) along the X-axis, jetting ink.
• When the head carriage has moved from right to left, it returns to the right, and this time, ink is not jetted.
• Y-axis feeding is performed.
• Again, the head carriage moves along the X-axis, jetting ink.
• When it returns, ink is not jetted.
• And then Y-axis feeding again.

When the head carriage moves like this, printing begins, and when it returns, printing does not begin. Printing in one direction is called unidirectional printing.

 

2.Bi directional print _Bi Uni Print Quality Differences

Since I explained uni directional printing, let me put it simply,

• The head carriage moves from right to left (or left to right) along the X-axis, jetting ink.
• When the head carriage has moved from right to left, it returns to the right, and ink is also jetted at this time.
• The flat Y-axis feeding is performed.
• Again, the head carriage moves along the X-axis, jetting ink.
• Of course, ink is also jetted when it returns.

Jetting ink both when the head carriage moves and when it moves back is called bidirectional printing.

 

II. Differences in speed and print quality _Bi Uni Print Quality Differences

 

1. Speed ​​difference _Bi Uni Print Quality Differences

‘Since it prints both when going and when returning, bidirectional printing is twice as fast as unidirectional printing.’

You might think this way, but in reality, bidirectional printing is not twice as fast as unidirectional printing, but about 1.8 times faster.

In bidirectional printing, the head carriage speed is the same when going and returning based on the X-axis,

but in unidirectional printing, when returning without jetting ink, the head carriage speed is about 30% faster.

In unidirectional printing, the number of head carriage round trips is twice that of bidirectional printing, but the head carriage return speed is higher, so the productivity does not differ by more than twice.

 

2. Difference in print quality _Bi Uni Print Quality Differences

If the UV Printer has the offset function properly,

and the UV Printer is set up mechanically as well as possible,

those who are new to UV Printers will not be able to tell the difference in print quality.

Those who are using UV Printers need to tell us the specific differences so that we can feel the difference.

As you can see below, they just look similar.

 

However, those who use UV Printers and deliver actual final products, look at the “roughness” and proceed with one-way printing unless there are special cases.

 

3. Why print quality varies _Bi Uni Print Quality Differences

When ink is jetted from the print head nozzle, the instantaneous speed is about 7 meters per second.

And the speed at which the head carriage moves is 0.8 meters per second.

No matter how fast the ink falls, it is affected by the X-axis movement and the ink falls slightly to the side as shown below.

The opposite direction is equally affected.

That’s why there is a window to adjust the bidirectional printing offset so that ink falls on the same spot when printing from right to left and left to right.

However, no matter how well the offset is adjusted, if the flatbed flatness is more than 0.2 mm, the offset will not be correct in that section.

You can understand the content I just explained more easily by clicking here and watching the video.

 

III. This is how ARTJET supports our customers.

 

One thing I feel while selling and maintaining ARTJET UV Printers for 5 years is that the next most important thing after product stability is Troubleshooting DATA.

All products have problems, whether they are actual equipment problems or consumer errors, and product stability is how easily and quickly you solve those problems.

Since words alone are not convincing, we are organizing all the troubleshooting DATA as follows.

 

1. Printhead Problems and Solutions Total 10

ARTJET UV Printer Problems and Solution_Printhead Problems Summary

Additional issue and solution
The red color does not appear at first, then appears during printing, and then does not appear again

 

2. Ink Supply Problems and Solutions Total 17

ARTJET UV Printer Problems and Solutions_Ink Supply Problems Summary

Comprehensive application
Damper replacement time
The nozzle test is fine, but it seems that a certain color is not coming out during printing
Capping station block positioning to match the print head and captop
Can I ignore the ink alarm and use it?
UV Printer Monday Morning Routine
I tried white cleaning every day for a month

3. Mechanical problem and Solutions 

1. How to align the print head in a straight line
2. There is a clicking noise from the X-axis
3. Banding problem in specific section
4. The Importance of Head Height in Bidirectional Printing
5. Problems that occur when the wiper height is high
6. When the cleaning belt screw is loose
7. When the capping fixing plate does not fit
8. How do I prepare the ARTJET electricity?
9.When Anti-crash becomes a jam in captop
10. Print head Anti crash system 

 

4. Electron board and Software problem is hereunder. 

1. The printer works but printing does not work
2. Resetting to default settings
3. Touch panel does not turn on
4. The printer is printing, but nothing is printed
5. Software closes when I just press the print button
6. Printing in the wrong place
7. Positioning misalignment in X-axis direction
8. How to make the Offset fine tune
9. Vertical offset is not correct only for the right section of white
10. Software turn off when click print button

 

5. Sai Flexi Rip software  

1. Sai Flexi Rip _ How to make the Spot Color & several mistakes
2. Sai Flexi Rip _ Color is strange after applying Spot color
3. Sai Flexi Rip _ White is sticking out
4. Sai Flexi Rip _ Installation and Dongle Key Recognition Failure Measures
5. Sai Flexi Rip _ Dongle Key Recognition Failure
6. Sai Flexi Rip _ White lines appear when printing only color
7. Sai Flexi Rip _ Color Adjustment through Graph
8. Sai Flexi Rip _ Print size compensation
9. Sai Flexi Rip _ Ink Consumption Calculation
10. What is ICC profile & menu board UV Printing
11. Sai Flexi Rip _ Dongle Key recognition Failure from USB port

 

6. Problems and solutions from actual consumer sites

1. Paper that absorbs ink
2. White Motor Pump Does Not Turn
3. A line-like thing appears at the end of the white print surface
4.Can varnish banding be reduced?
5. Are there many problems with China’s UV Printer?

7. UV Printer Application 

we are explaining not only UV printer problems and solutions, but also what products are produced with UV printers.

1. Braille printing
2. Flip the material and align it
3. 2.5D UV print
4. ARTJET UV Printer Application 6 _아크릴 본딩 장비
5. I phone 14 print limitation 
6. Mask printing not recommend
7. Leather Cigarette Case UV Printing
8. Round soccer strategy board UV printing
9. Primer  performance & limitation 
10. UV Print & Laser crop mark cutting
11. Mobil case UV print profit
12. Screen vs Digital Comparison and UV Printing on Hand Sanitizer Cases
13. Bottle zig & print
14. Canvas UV Printing
15. Applying epoxy effect with varnish
16. Making a light frame with UV Printer & Laser cutter
17. UV Printer & Laser Cutting Equipment Button Name Tag Making
18. UV Printer & Laser Cutting Making a Cell Phone GripTok
19. Making an Acrylic Keychain with UV Printer & Laser Cutter
20. UV Print with Zig
21. How to make RD WORKS CCD camera cutting Video manual
22. Acrylic bonding equipment
23. All the steps to create UVDTF
24. UVDTF TEST Result on various material
25. ARTJET CW+C Print time & Ink Cost
26. Create a white shield with different images on the front and back of the keyring
27. Keyring Business Required Equipment and Investment Costs
29. Acrylic Lighting Goods
30. Ballpoint pen jig printing
31. Staining occurs when printing on coated leather

 

 

That’s it for today.