Mutoh 1304 / IJ180C Heat settings

The recommendations from 3M were 42/30/50.

 

A number of possibilities.

Head alignments - does it change when you print uni?

Encoder/timing fence or timing disc - clean the timing fence and disc with denatured alcohol. Check that the sensors are not touching the fence or encoder.

Some type of harmonics between the RIP software (sample size) and the wave you are using. - try a different wave type.

Do you see this on all media and images or is it image dependant?

 

I would still check in uni.
And try a different wave form.

 

I have actually experienced the same problem with a similar color, I print CMYK only (just the four colors, no light cyan magenta, etc.) on a mimaki. Maybe try a different profile, or convert the artwork to rgb or cmyk before ripping.

 

You may want to try this:
http://www.mutoh.com/kb/entry/68/

I put a file in the 1304 Test folder - grantgreen

This is a glossy ABV profile.
This will take your RIP out of the equation.