CJV30 Vertical Lines, maintenance?

[Valentinik]

Hi all, i am looking for a bit a guidance, I am currently experiencing vertical lines in prints every 5-6 inches across the media. (see attached images)

I'd already planned on changing out the capping station, dampers as i don't know their age. Test prints come out perfectly however i do every so often get banding developing and then have the magenta and yellow dropping out which is cured by a normal clean.

Is there something else i should be looking to change out to try and remedy this issue? Would changing out the pump be worthwhile?

Also, is it a must to use Oem Mimaki Dampers and wipers or are aftermarket ones any good?

Thanks
Mike

 

[Adam Vreeke]

Just the marks looks like dirty rollers, have you cleaned those recently?

 

[Valentinik]

Just the marks looks like dirty rollers, have you cleaned those recently?

Thanks for the reply, i did initially think that and cleaned them, but the marks don't line up with where the rollers sit.

 

[Adam Vreeke]

Thanks for the reply, i did initially think that and cleaned them, but the marks don't line up with where the rollers sit.

Hmmm, I am walking in the dark here a bit, but is the encoder strip dirty / misaligned? That is where I would go to next and my knowledge of cjv30's is very limited, you may need to wait until someone like Solventinkjet wakes up.

 

[Solventinkjet]

I'd say inspect and clean the encoder strip next for sure. You can also run an encoder test in service mode that will tell you if it's reading off. The dampers might fix the issue as well as when they fail they can do so intermittently.

 

[Valentinik]

An update on this. I eventually got around to replacing the encoder strip and the capping station complete with genuine mimaki items. They didnt cure the problem. I did think it may be the heaters drying the ink unevenly on the media, but i did a test print with the heaters turned off but he imperfections are still there.

Could anyone offer a suggestion as to where i should look next?

Thanks
Mike

 

[Solventinkjet]

Vertical lines are almost always a bad encoder or a pinch roller issue. If we've ruled those items out, I'd say change the dampers if they are older than 1 to 2 years just to rule them out. Sometimes they can cause weird issues like this but it's rare. Other than that, it's probably an electrical issue. Do you know how old the head is?