Horizontal Streaking on my 33

[dmfahie]

Hello. In the attached pic you can see I am getting weird streaking, this is from the vinyls after they are heated not sitting flush on the platinum. This happens mostly in the IJ-40, a bit on the 180c. I wish i could just change the vinyls, but it was specked by the customer. I have lowered the heat, almost off and this still happens. All vinyls are also profiled, not just the mfg. profiles. I did not have this issue last year, now I do. I have worked on my climate control etc in the shop. I really don't know what is going on here.

JV-33
SS2 Inks
IJ 40c & 180c 54" / 60"
Wasatch

 

[Imagine2013]

Streaking

It looks like the rollers need to be cleaned - you can just lift the damaging roller to be able to print

 

[AnimalG82]

I would check the media comp, that may need to be adjusted.

 

[dmfahie]

Imagine- The "streaking" is actually in-between the rollers.
Animal- Yes, I agree, but the issue is the streaking going the other way, not the banding

 

[J Hill Designs]

taking slack off of the roll (so the machine isnt tugging on a heavy roll) helps with this

 

[Samurai_Screwdriver]

I have seen this many times before - It's likely that the media is not laying flat (i.e. buckling up slightly between the rollers) and thus the distance between the Head and the Media is not consistent. This causes the drops to land in these area slightly out of alignment, especially if you're printing in bi-directional. Either run in uni or try to get the media as flat as possible. With adhesive vinyl I've usually had good luck running the pre-heat 5-10 deg higher than the platen heat - something about this seems to help the media really flatten out.

 

[dmfahie]

Dave, thank you.. I will try this asap... did you work for Mimaki?

 

[dmfahie]

Dave- that worked AWESOME! THANK YOU!!!!