roller marks

[Gav1n]

hi there.im having problems with roller marks on solids,looks like damp roller marks.my settings are fine,but have the same roller mark on all units about 2 inchs wide about a 3rd up the sheet?im running a 52 printmaster.any body else had the same issue?
thanks Gav

 

[Gav1n]

hi there the diameters are fine,i've 3 new dampers in recently and had the roller manufacturers double check the diameters.its defo something to with that,cause when i run a dry solid there no problems?very strange.i read on a forum that with dds systems theres a point where the damper releases from the plate causing not enough damp to plate?
thats for the reply.Gav

 

[RGPW17100]

Verify your stripe to the oscillator is bigger then to the plate. Maybe 5 mm to the oscillator and 4 to the plate. DDS water rollers depending on the manufacture tend to need replacing almost yearly. Going less then 4 mm might decrease the mark but will increase problems with hickeys. Does your press allow you to oscillate the form rollers?

 

[rbailleu]

copy questions. is this a printmaster gto 52 or a pm52 like a sm52. or another way is it dds or alcolor? if it is dds then is the mark about 7 inches from the lead edge. do you have a ref/rec unit. lower the temp and add alcohol. if it goes away then welcome to dds. almost all rollers are between 2 and 2.5 inches. this puts your repeat between 6 - 7.5. marks around 4-5 inches could be transfer issues. but I doubt you would have transfer issues on all four units. I would try lessening the pressure on bridge roller to 3mm and see if it gets better or worse.