Hoping there is a simple solution to my impression problem. I’ve had my Vandercook No. 4 for several years now and this problem just started happening on my last job. It seems to me that the impression cylinder is dropping into impression mode later than it ought to be. Rather than the typical 3 1/2 pica area lost to the grippers, I don’t get a full, clean impression until 1 1/2 inches onto my paper.
On an SP-20 I have used, sometimes if type is set right against the dead bar, I’ll have slight issues right where the impression starts, but this seems unusual being so far out. The type is 3 picas away from the dead bar and no matter how far I move it, the bad impression line remains in the same location. Tried several different forms to make sure it was the impression cylinder, not the type. I have fairly fresh tympan and no slipping of the packing which could also cause the consistent line of bad impression across the sheet.
Please let me know your thoughts, your expertise and advice is greatly appreciated!
Erin Beckloff // Inky Winke Letterpress & Design