Roland LEJ-640 in CMYK mode (4 heads only)?

[kristhetrader]

Hi there,

Is is possible to setup the Roland LEJ-640 just to run as CMYK with the 4 heads only? That is without the other 2 heads installed at all?

If not, what is the best way to have the 2 extra heads that will not used inactive?

I want to keep the 2 extrta heads OUT of the printer, is this possible at all or this printer needs to have the 6 heads working for it to work properly?

Thanks for your thoughts!
R

 

[SGC]

Hi there,

Is is possible to setup the Roland LEJ-640 just to run as CMYK with the 4 heads only? That is without the other 2 heads installed at all?

If not, what is the best way to have the 2 extra heads that will not used inactive?

I want to keep the 2 extrta heads OUT of the printer, is this possible at all or this printer needs to have the 6 heads working for it to work properly?

Thanks for your thoughts!
R

Cleaning carts in the white/clear. I’ve had a dead head in my white/clear slot for years. I do believe the board needs something in there, but you for sure don’t need them to work or have ink flowing.

 

[netsol]

there is quite a difference between putting a cleaning cartridge in, in place of an ink cartridge & not having 2 print heads.

 

[SGC]

there is quite a difference between putting a cleaning cartridge in, in place of an ink cartridge & not having 2 print heads.

The protocol on the Roland machines when you no longer want to use white/clear is to put cleaning carts in. I’m very aware there’s a difference.

I don’t have the info if the board will allow it to operate without them in place. If it was me, I’d power down, remove power cord, take a picture for reference, remove flat cables from board and heads, fire up, see if you throw an error. That’s your answer.

 

[cornholio]

I'd say the printer works without the heads installed. The cartridges need to be installed for the chosen mode. Either CMYKWhWh or CMYKGlWh.
I sometimes do tests with disconnected heads and it works. But I'm always in servicemode then. So I can't say, if it works in normal mode.

 

[netsol]

I'd say the printer works without the heads installed. The cartridges need to be installed for the chosen mode. Either CMYKWhWh or CMYKGlWh.
I sometimes do tests with disconnected heads and it works. But I'm always in servicemode then. So I can't say, if it works in normal mode.

i am kind of surprised, i would have assumed. SOME SORT OF ERROR with the head missing

 

[kristhetrader]

Thanks people for your answers. I'll go with cleaning carts for those heads.

Just one last question, installing the cleaning cartridges is just a matter of inserting them and cleaning those heads a few times and that's it?

Thanks for your thoughts once again,
R

 

[SGC]

Thanks people for your answers. I'll go with cleaning carts for those heads.

Just one last question, installing the cleaning cartridges is just a matter of inserting them and cleaning those heads a few times and that's it?

Thanks for your thoughts once again,
R

Yep! Then just make sure you keep an eye on their levels and replace as needed. I use bulk carts with bulk solution to keep the cost down.

 

[Solventinkjet]

Running it without the heads installed will most likely give a head temp error. It needs to get a reading from the head thermistor and if it doesn't, it defaults to too cold.

 

[petepaz]

when we had our XC-540 and the white heads crapped out we ran the machine for years with cleaning cartridges in those two slots. i do not know for sure but i don't see why you couldn't do that with the LEJ as well. we do have an LEJ als but we do use the white a lot and occasionally the clear/gloss

 

[netsol]

when we had our XC-540 and the white heads crapped out we ran the machine for years with cleaning cartridges in those two slots. i do not know for sure but i don't see why you couldn't do that with the LEJ as well. we do have an LEJ als but we do use the white a lot and occasionally the clear/gloss

sure, but, running with cleaning carts is VASTLY different than running with heads missing

 

[cornholio]

Running it without the heads installed will most likely give a head temp error. It needs to get a reading from the head thermistor and if it doesn't, it defaults to too cold.

This thermistor is only read from either head1, or the black head.
I had a customer LEJ running with disconnected head5 for two weeks without error message in normal mode. (Fixed it yesterday)