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So many missing nozzles in M or LM will definitely cause color deviations... Since the overlap seems to be the same over the whole whith of the head, horizontal adjustment is needed. (Bias, or Slant would be needed if you have overlap or gap on top or bottom of the head only)

If the nozzle test is good, it's the ink. (I have seen people trying to print with 90% deflected nozzles...) Bulk systems are generally a problem. (Except if you have a monthly turn around of the ink, but even then you have some year old pigments at the bottom...) I'm not a printer, I fix and...

There should be no need to clean the substrates. If it does, change the supplier and/or operator.

A 11k XR sounds second hand to me.(these are high quality PRO4 Rolands if properly maintained) Maybe you should check the pinch rollers/holders... But then, I'd always prefer a Summa for cutting.

Old Rolands with very old firmware may not recognize cartridges with the latest generation of chips. Update the firmware first, if the cartridges aren't recognised.

Export a PDF from Flexi and send it from Coproduce.

With Summa, it's Flexcut. You probably need to select a different tool number.

OK, this would be my customers duty and risk to get a defective head replaced. I have had very few defective heads (DX4 and DX7 whith one dead nozzle mostly) over the years. (I RMA them no questions asked as certified tech. But when I killed every 10th head, this could be different) If Digiprint...

Changing from color to white/metallic isn't a big deal. The other way is.

How long do you fiddle on a clogged head, until you dump it? The hourly rates around here prohibit that, since you need to replace the head anyway.

Digiprint supplies sell original Roland heads from my experience. We buy from Roland, but I have customers, that buy from Digi and let me install them. I never had any problems with their heads. They sell original dampers, but also much cheaper china-copies that have a 30% fail rate. That may be...

The rank is on a sticker on the packaging of the head. The head should print with the old/wrong rank. You probably inserted the head wrong. The white sticker needs to be on the left side.

You need to be able to get into service mode in order to enter the head rank and to adjust horizontal and media gap(formerly bidi). Otherwise it's easy, if you know what you do...(like most things)

Cut too deep, or using the wrong transfer tape. There are three differently tacking transfer tapes available from 3M. (Other vendors will have it as well)

My experience is, that the timing belt and pulleys are the culprit. There mostly is dust and ink mist build up on the pulleys until the belt jumps teeth. I use a tooth pick or a cut cable tie to remove the buildup on the pulleys and you are good to go for another couple of years.

That's exactly describing it... one pull is really easylier and faster than holding down every dot in a text.

Looks like one of the sensors is defective.

Get the head replaced. Some of those Ricoh heads just don't work correctly. Cyan seems to be most problematic...

Versaworks 6 doesn't support the VS-640. But it supports the VS-640i, because it's a newer model.

Summa, if you want to ease your weeding for the next couple of years. I don't understand people "saving" money on mediocre cutters and then spending their time and nerves on weeding for years and years... I once had a case, when a customer sent a media back, that "didn't work anymore". He was...