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Need Help XR640 - Does this mean it's time to replace the print heads?

VinylLabSF

New Member
Just wanted to check in with the experts before I pull the trigger on replacing the print heads.

Lately, I’ve been noticing a lot of misting/overspray on all my prints. (see attached).

I know this photo is only showing black, but it also happens with cyan as well.

The nozzle test print is usually almost perfect minus a few missing lines here and there, which end up correcting itself after a standard clean cycle.

Disregard the 2 huge missing sections on the LC (it went away after a manual maintenance cleaning). I'm using this photo to show all the random lines where the white ink used to be. (currently have a cleaning cartridge in that slot). This is the worst case I’ve seen. 3/5 times there's nothing and normal, 2/5 I’ll get some random lines here and there.

So, does anyone have any suggestions I should try first before I spend a huge chunk of money? Thanks in advance.

- Printer is 6 years old.
- 1 print head was replaced end of 2021 when the white ink stopped working. Had a service call for a tech to come out and fix it, tech replaced the print head and damper, charged me over $3k only to tell me he doesn't know why it still doesn't work. Gave me a small bottle of cleaning solution and a syringe and told me to flush the line because maybe the ink dried out in the line and left. He told me because white ink is thicker, I needed to shake the white ink cartridge every week and if I’m not constantly using it I should just put a cleaning cartridge in the slot.
- Cap Tops replaced beginning of 2024.
- Wiper and Felt gets replaced maybe every 2 months.

Also just to note. I will admit I don't do weekly manual maintenance cleanings. Typically I'll do a manual clean once every 2-3 weeks or when I can't get a clean test print using the standard clean cycle.
 

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Zoogee World

Domed Promotional Product Supplier
I'd start by cleaning the encoder strip first, as I don't really see any deflection in the black nozzles, maybe a test strip in service mode with the smaller detailed view may show more.
 

VinylLabSF

New Member
thanks for the feed back.. Looks like the same head that was replaced before..

any idea how to get the white line working again? try and flush cleaning solution thru the entire line or just replace the tube/damper/pump all together?
 
Check to see if the white is clogged at the head, then you know if you need a head.
Yes, you need to check complete ink system for the white from the I/C holder to damper and the recirculation line and recirculation pump.
Then you will know what you are dealing with in terms of parts that need to be replaced.
 
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