Sub Tank Overfilling on UJF-6042 MKII

[Landrik]

Need to do the pressure adjust on the throttle valve, should be within 15-20.

Is top left number negative, top right positive?
Number to right of pump on is what?

 

[Smoke_Jaguar]

The negative and positive pressure adjustments are in different sections. If you have the install guide/setup booklet that came with the printer, it goes through the process, with pictures. I think it is on Mimaki's site as well.

 

[Landrik]

Update - I did stretch the spring a bit on #2 clear valve. After adjusting positive pressure down from 53 to 17 I was able to complete an overflow maintenance and it drained the sub-tank. Woohoo! Got a new Supply error on #2 clear. Took the small cover off over the valves and lightly tapped the stem coming out of the valve #2. It seated (didnt go all the way in) and it stopped trying to pull from clear bottle. Reboot fixed the error so I'm going to go ahead a change that valve. Thanks much for the helpful info and support!

 

[Smoke_Jaguar]

You can flush the valves with a clip fitting and a syringe. Remove the bottle, clip onto the valve bottom side, push the valve in to open it and push/pull the ink back and forth with the syringe to dislodge built up crap in the seal. Note that you will likely get an overflow, opening the system to air will let ink in the line drain into the subtank by gravity.

 

[patuga]

which one should i use for the positive pressure?
the second option -> positive pressure (check)
or the 4th option -> positive pressure?

in my case the (check) option is at 16.5 which is ok, but the bottom option usually goes to 22 ish.

I've been recently getting overflow issues on the white channels. the machine has been stuck powered on during regular maintenance, so i'll probably have to call the techs soon (again)

I've never had to swap any air filters (on the back under the valves) and the valves were only swapped by mimaki request, when the machine as a few months old.

 

[Smoke_Jaguar]

Could be a leaking ink supply valve (M015864 / M026750) if I were to take a guess on it. If getting pressure errors, not a bad idea to check your throttle valve.

 

[patuga]

Tech was here two days ago, and the ink valves (M015864) of the white channels and the seals were exchanged. problem solved

 

[Martinnz.b]

Pump on it could be time for how long it was enabled.

 

[patuga]

which one should i use for the positive pressure?
the second option -> positive pressure (check)
or the 4th option -> positive pressure?

in my case the (check) option is at 16.5 which is ok, but the bottom option usually goes to 22 ish.

I've been recently getting overflow issues on the white channels. the machine has been stuck powered on during regular maintenance, so i'll probably have to call the techs soon (again)

I've never had to swap any air filters (on the back under the valves) and the valves were only swapped by mimaki request, when the machine as a few months old.

a follow-up on this...
tech told me that while there are two options for the positive pressure, the one one they use is the (check) 2nd option from the top.
If the pressure is calibrated on the last menu option, the machine will eventually throw an error of not enough pressure while printing.

 

[Smoke_Jaguar]

Might need to recalibrate the throttle valve, also a chance an air fitting got loosened up.