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TOPIC: Roland CJ 500 problem

Roland CJ 500 problem 9 years 9 months ago #42

  • Allan
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We have a cj 500 which has been converted to eco inks & whilst it has been printing well, recently
we have been having a problem with colour drop out to magenta & orange after about a meter of print. We have changed everything from the cartridge to the print heads including all lines but still the same problem. Could this be caused by the mother board or electronics somewhere. We have noticed also that when checking ink levels it is giving a wrong reading, eg: saying the cartridge is empty when it has just been filled.

Help please

Re:Roland CJ 500 problem 9 years 8 months ago #261

  • cielab
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I am not aware of anything electrical that might cause this problem.

If you aren't using genuine Roland inks then the quality of your 3rd party ink might be very poor and blocking your printheads regularly. This might be enough for you to print a metre or two before the ink blocks your heads again.

We do a lot of work with both genuine Roland inks, and 3rd party inks and there are unfortunately a few inks out there that are of very poor quality, and some on the flip side being excellent quality.


Re:Roland CJ 500 problem 9 years 8 months ago #265

  • Guru
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All ink in a piezo print machine runs via gravity. drop outs are not caused by electrical issues unless the printhead fails.

The previous response is the most likely. Poor quallity ink will block the filter attached to the head it looks white and is shaped like a D with an in and an out. This is a consumable item and should be change at least quarterly.

The other issue is if the machine was converted to a different brand of solvent, than the pumps should also be changed and these are also a consumable item. When it comes to solvent printing over time the ink seeps through the tube and breaks down the plastic in the pump. Once the pump stops functioning correctly it will suck air not ink the machine needs to suck ink (purge) to prevent any ink not being used from block jets. If more than one colour gives you an issue this would be the likely cause.

As for the cartridges giving false readings this is a common issue. when you insert a new cartridges the machine should reset the counter. If you pull the cartridge out then put it back in the machine believes you have inserted a new cartridge. (this only relates to piezo machines)

FireBoard: Reply Topic: Roland CJ 500 problem 1 year 2 months ago #2893

  • salon massage lyon
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You really make it seem so easy with your presentation but I
find this topic to be actually something that I think I would never understand.
It seems too complex and very broad for me. I'm looking forward for your next post, I'll try to get the hang of it!
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