sp300v ink starvation whilst printing crop marks
Hi all, really hoping someone can help, i’ve been fighting some issues with my old sp300v for a few weeks now, i’ve recently replaced all the dampers, cap tops and the magenta/yellow head, however i’ve now got an issue where its failing to print the crop marks, it tries but doesnt lay down enough ink to print them fully, it then however goes on to print the design perfectly, and then fails at the second set of marks too, i’ve printed out some black/cyan/magenta/yellow colour blocks and printed them at different head speeds, as the speed gets up past 700mm/s it starts to fail printing the black and cyan, at 1000mm/s it barely prints them at all just like the crop marks. There’s plenty of ink in the dampers, and interestingly if i remove them and re seat them it starts to print the marks again, but by the time i gets to the second set of marks it fails again. so i’m pretty sure its a starvation/supply issue, however i’m stumped as to what can be causing it?
the dampers and cap tops are all new and OEM ones, i’ve tried doing cleaning cycles, medium cleans, pulling ink through manually from the cap top, manual cleans, i’ve had the dampers off and replaced with the old ones, tried priming the dampers with more or less ink. nothing seems to have any effect other than for a short time. at normal print speed of 4-500 mm/s it prints perfectly, however i need to laminate a couple of the jobs i have lined up and its making it impossible!
does anyone have even the faintest idea or suggestion?
is there any way at all to slow down the crop mark printing?
thanks a lot!