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Gamut volume tells you little. Profiles of completely different shape could have identical gamut volumes. Looking at the two profiles pharmacist posted the shape deviates around the edges a bit and the WF-7840 white point is significantly darker.

It flashes red during a measurement. It looks like green just indicates charging from the USB port and the brightness indicates charge. The charging seems to cycle cutting off when fully charged then cutting in again to top up the charge and the LED goes dim.

The CR30 only calculates and displays Lab values for D65/10. The software calculates Lab values for the illuminant you select. If you change the illiuminant the software recalculates the current measurements. I don't know what green light you are talking about.

The ti3 generation script I wrote for the CR30 doesn't write an ink limit so it is a non-issue for that usage. Scanning the list you linked it does look like if the ti3 contains an ink limit forcing it to 310 with a colprof parameter is a work around for the problem.

The batch files have 2 lines. One to run targen and the second to run printarg. You don't need to be a programmer to edit command line parameters in a batch file or to run one. It took 27 lines in the readme to document all you need to know about target generation.

A bit more information on the bug would be interesting. We are not all using the same ones. The required patch size depends on if you are using a guide and its pitch. Then you have paper size to choose then how many patches you can be bothered to measure and how many you want to allocate to...

Assuming you use windows you would be better off using the powershell script here and also check my post which details how to generate your own targets and generate .ti3 files from the command line with an awk script.

Going to get rid of this bot (or idiot) posting AI generated drivel?

The OP and I were talking about borderless printing overspray collection pad replacement which the WIC utility could but apparently doesn't support.

Printing borderless is generally considered to be a bad idea and gave you this problem. There is a WIC reset utility which claims to support the ET-7750. It requires you to purchase a US$ 10 key to use it (possibly a free trial key can be used to set the pads to 80% full). Personally I would be...

There a many small (250g) spool adapter designs to fit the AMS (including this one of mine for EONO spools). If PLA is breaking in the AMS it is probably brittle from being damp. That said I always pull PLA out of the AMS feeders when not in use. Constant pressure from the feeder gears and/or...

When comparing profiles I created with an i1studio and Epson installed profiles for the ET-7750 (ET-8550 predecessor) I found the Epson profiles to be a little optimistic all round.

Hopefully you can do what the author has failed to by posting a Printprism created profile for an ET-8550 supported Epson paper. One of their glossy papers preferably.

If you mess up the 'un-randomizing' you can give colprof a well formed ti3 file with measurements associated with the wrong patches. SAMPLE_LOC gets an extra character after 26 columns. Just guessing.

Maybe more than 26 columns? I don't have much experience with colprof. It uses loads of memory and CPU. I have a feeling when fed inconsistent data it will barf or take an inordinate amount of time trying to make sense of it.

My guess would be a bug in your script. Did you compare generated .ti3 files from your script and the working awk script?

Sure. As long as you are happy to only use papers and ink from that particular inkjet manufacturer which are supported by that particular printer. With the ET-8550 for example your photo papers would be limited to 2 mattes, 1 lustre, and 3 glossies differing only by weight.

Yep, Epson use some different media names in different regions. My comment wasn't really a suggestion for the batch file just a heads up. When you profile a non-Epson paper the question is what is the best media and quality setting to use and I posted my conclusions. If you inspect the Epson...

Thanks for sharing. I don't know if you followed older threads, but, I have posted that as far as I can see for the ET-8550 all glossy and lustre or semi-glossy media settings are the same except ultra glossy which has a best quality setting that I think needs its own profiles. I don't think...