Need help with horizontal banding

[junaid]

Have a HP Latex 260. Substrate is HP Gloss Vinyl Adhesive— using Sai RIP.

Having these really bad ghosting/white banding/intensity issues out of no where. Only in blue/green prints. This is what we've tried so far:

• Replaced both C/LC printheads
• Printhead cleaning (x4 times)
• Printhead automatic and manual adjustment
• Replaced maintenance kit
• Substrate advance calibration preformed
• Altered heat settings
• Increased number of passes (8,12,16 pass)
• Verified newest firmware of Printer, Sai Flexi 19 Software, and correct ICC profile (HP Permanent Gloss Adhesive)
• Power-cycled printer several times

Spoke to HP and did a nozzle test on the printheads and the nozzle health was within spec.

Not sure what to do at this point. Anybody have any ideas?

Pics below:

 

[StarSign]

Have you given the area around the print heads a good look, sometimes crap is floating around

 

[junaid]

Have you given the area around the print heads a good look, sometimes crap is floating around

Yup, just did. Removed the printheads and cleaned the area underneath. No luck

 

[Matt Gatenby]

Have you tried a different substrate ? i know it's a long shot but needs to be counted out

 

[greysquirrel]

you installed 220 power for this printer. Have you confirmed that power is not spiking to high when the heaters are turning on? Looks electrical to me. I would put an amp clamp on my lines and watch to see how stable your power is running. If you are up over 230v, that is your problem.