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Nobody said it was easy ;)

Here is the only free ICC Profile Creation System / tool that I am aware of (it is really a pretty good tool, but as it is open source software, there is little available tech support for it): www.argyllcms.com

For instructions on cleaning or replacing the ink funnel, check your maintenance manual that came with the printer. The funnel should be cleaned about once or twice per year. It is part of normal maintenance with this machine.

Power down the machine (main power at the back) and unplug from the wall. Then manually move the carriage to the right end of the printer (toward the control panel) so the printheads are sitting on the maintenance cartridge. Make sure that the heads are sitting on the top of the cartridge. You...

Most driver-based desktop printers are considered to be RGB devices from a color management perspective, despite the fact that they have CMYK inks. RIP-based printers are typically CMYK devices.

Or better yet, switch it to auto-configure to the language that is being used by the application that is driving the plotter. This is done from the Menu button on the Graphtec control panel (> I/F > Command > Auto > Save).

That is really strange. Normally I would first think about contaminated media, but based on your description, it sounds like the problem comes and goes in successive jobs on the same media roll. The Latex 3000 uses optimizer and IR heaters in the carriage. If there are issues with either of...

I cannot help much with the adjustment questions as I have little experience with performing these type of adjustments on the RS machines. RS support would be who I would direct this type of query to. I can confirm that your webbing in the photo is incorrect. It should feed from the core in the...

Make sure that you are performing a Bi-Directional Alignment Calibration, and not a printhead alignment calibration.

It means that the nozzle performance is degrading into a marginal state, where the Image Quality (IQ) could be affected. Run a nozzle test print to check the nozzle status, or if you are OK with the IQ, keep printing until the machine forces you to replace printhead(s).

It sounds like you are losing nozzles during the print run. Assuming that they return after a period of inactivity, here is what I would suggest doing (sequentially, in order): 1) Reduce the curing heat. You should not need anywhere near 249 degrees for that media. You could be losing nozzles...

Caldera supports Color Replacements and the use of Filters, both of which can automate this task.

+ 1 (Either that or the old Dodger pitcher Rick Honeycutt.)

Appears to be lint or some other debris that is on the printheads or carriage. Check with a flashlight.

Sounds like the same issue (Valuejets use the DX5 printhead): http://www.signs101.com/forums/showthread.php?105321-New-DX5-printheads-cause-a-line-at-60cm/page2

There is a round Drive Roller Encoder Disc at the left end of the drive roller. It has a sensor that reads the movements of the disc. Are you seeing any 56:10 errors? It is in an area that would require an amount of dis-assembly to access.

There are several vinyl medias designed for low energy plastic: Arlon 8000 Substance 440SE Convex

The first place I would focus is the substrate path. Perhaps a random error caused by a dirty media encoder in the left-side end bell?

It is very unusual for an HP latex ink printer to do this. I've seen this on printers that use Epson printheads many times over the years. It is referred to as White Banding. How wide is the affected area (front of the band to the back)? Does it only happen once, or multiple times in a print?

I support over 80 latex units in the field, as well as multiple latex machines in my facility dating back to 2010, and have never encountered that issue. Either some underlying cause on that unit or a user-related issue in all likelihood.