Magenta prints unevenly QMDI Pro

[leemay]

On heavy coverage, the magenta prints unevenly in alternating heavier and lighter areas. We've checked out the form rollers and a Heidelberg tech shimed the rollers for us, but the problem persists.

Again this is only in the magenta unit.

Any thoughts appreciated

 

[rbailleu]

adjust the lasers.

 

[leemay]

The uneven coverage extends across sheet in the 13" direction. Uneven laser imaging would not cause this problem.

 

[rbailleu]

my appologies my whole response was deleted and I did not take the time to retype .

have you burned a 60% screen on the whole plate to see if its a plate issue.

how wide are the different shaded areas. does it correspond to a roller circumference.

have you tried swapping out rollers from one unit to another. say the yellow unit

have you changed blankets.

I would burn the test plate first its the quickest test.

 

[Elbertjolley]

I agree with rbailleu. I would do a Doid test