screen printing > Screen Making

Exile Spyder-screens not registering on press correctly

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Rockers:

--- Quote from: ZooCity on May 02, 2022, 01:00:40 PM ---All around excellent advice here. 

It sounds like you did so already but, in case I misread- ensure that the CTS itself can repeat registration.  i.e., is it printing the reg marks in the same place on each screen if you print twice without removing the screen?  It's very possible to have an x or y axis alignment or repeatability issue with the CTS itself.  Rule this out before you go chasing your tail downstream. 

If it repeats without removing the screen, see if it will repeat if you remove the screen and reclamp.  It could be an issue with how the screens are loaded and clamped.

If everything is repeatable at the CTS itself, do a decent size control batch to make sure it's 100%.  If it is 100%, then start looking at the jig you are using on press and ensure you are matching the exact three points of contact from CTS to press.  Procedure in loading the frames is important here and will make a difference in registration success.

--- End quote ---
Thanks for your input. We indeed made sure the CTS can repeat registration, we did several tests. No problems there. We did with and without removing the screen, both times the registration is bang on. My money is on the drum causing too much tension on the mesh and the fairly big contact area on those stop blocks,

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