Spray of ink mimaki 3042mkIIe

[dimitrill]

Help me figure it out. Ink is sprayed from the left side of the picture. Always from one side. Changed LD1, LD2 modes. Adjusted head gap. Temperature 23C, humidity 40-50%. If you try to wipe with a stain, a black and red mark remains on the fabric. That is, it is black and purple dust.We also installed an ionizer. No result.

 

[dimitrill]

We also installed an ionizer. No result.

 

[Tatonka]

did you do a good cleaning? Check the cap stations for any wear, and the wipers. You can also replace the filters in the mist collector just to the left of the heads if you haven't already.

I've also had occasions where the laser will work out of adjustment slightly on our 6042's, so it's worth checking the head height in multiple locations on the table. It might be setting the head height farther than it thinks it is.

 

[dimitrill]

did you do a good cleaning? Check the cap stations for any wear, and the wipers. You can also replace the filters in the mist collector just to the left of the heads if you haven't already.

I've also had occasions where the laser will work out of adjustment slightly on our 6042's, so it's worth checking the head height in multiple locations on the table. It might be setting the head height farther than it thinks it is.

cleaning is done regularly. everything according to the instructions. the mist filter is cleaned and replaced regularly too. we don't skimp on this.
tell me how to check the laser?

 

[dimitrill]

It's interesting that it appears randomly. We print 6 cases. The coating appears on one, then on two. Then on all, then on none. It doesn't depend on the position on the table.

 

[Tatonka]

cleaning is done regularly. everything according to the instructions. the mist filter is cleaned and replaced regularly too. we don't skimp on this.
tell me how to check the laser?

take a block of metal or something, ideally a 10mm gauge block, but anything will work really. Put it at the front right corner of the table, have it auto find the height and write that down. Do the same thing at the back right, front & back center, and front & back left. It should be within like 0.2mm everywhere.

The mkiie's are better than the older ones, the laser adjustment part is all metal now instead of plastic, so it generally doesn't lose calibration as easily or as often.

 

[lenard912]

Weird it’s always the left side. That definitely smells like a head height calibration issue or some kind of air draft.

 

[Smoke_Jaguar]

The reason it is on the left side is because the printer only prints unidirectionally.

Check the underside of the ink carriage and make sure old ink hasn't built up around the heads.

 

[dimitrill]

take a block of metal or something, ideally a 10mm gauge block, but anything will work really. Put it at the front right corner of the table, have it auto find the height and write that down. Do the same thing at the back right, front & back center, and front & back left. It should be within like 0.2mm everywhere.

The mkiie's are better than the older ones, the laser adjustment part is all metal now instead of plastic, so it generally doesn't lose calibration as easily or as often.

thank you. I'll check today.
if the discrepancy is greater, what should I do?

 

[dimitrill]

Weird it’s always the left side. That definitely smells like a head height calibration issue or some kind of air draft.

"some kind of air draft." what do you mean?

 

[dimitrill]

The reason it is on the left side is because the printer only prints unidirectionally.

Check the underside of the ink carriage and make sure old ink hasn't built up around the heads.

Maintenance is performed every 4 hours:
1 nozzle wash 5min,
2 carrying out 011 liquid wipe heads
3 nozzle wash 5min
4 clin-normal, test
and every evening:
1 nozzle wash 5min,
2 carrying out
015 liquid wipe between heads
011 liquid wipe heads
07 liquid wipe carriage surface and caps
3 nozzle wash 5min
4 clin-normal, test

 

[kehall]

I think lenard912 means there could be some air flow (fan or something) blowing air under the heads... If there are any broken ink droplets (imagine a single squirt of ink from nozzle breaking up mid-flight into a main drop with some "satellite" droplets, they could easily be blown off course and have an overspray effect like that.

Are you using genuine ink? If there's a discrepancy in the ink manufacture with viscosity or something like that it could possibly have a similar effect if satellite droplets are formed from the drop ligament as it is squirted.

Does a test/nozzle check print show any signs of overspray (probably need a microscope as will be less ink)? Is it just the black? Does the same print on another material have the same effect?

 

[dimitrill]

I think lenard912 means there could be some air flow (fan or something) blowing air under the heads... If there are any broken ink droplets (imagine a single squirt of ink from nozzle breaking up mid-flight into a main drop with some "satellite" droplets, they could easily be blown off course and have an overspray effect like that.

Are you using genuine ink? If there's a discrepancy in the ink manufacture with viscosity or something like that it could possibly have a similar effect if satellite droplets are formed from the drop ligament as it is squirted.

Does a test/nozzle check print show any signs of overspray (probably need a microscope as will be less ink)? Is it just the black? Does the same print on another material have the same effect?

the test looks normal. we didn't look under the microscope.
the ink is original.
there is no wind. the air conditioner is far away and we print with the lid closed. so it definitely can't shrink.
this happens on different materials.
we print 6 cases. maybe without spray, maybe one, or maybe 2,3. regardless of the position on the table.


if you print on transparent acrylic, this spray looks transparent (just a murky trail). but if you rub it with alcohol on the fabric, a black and red mark remains.
the service also does not know what the matter is.