For today’s obscure 219 os question, I’m hoping to have some light shed on the sheet rollers. I’ve never used them and know many people just take them off but I have a project where they may come in handy. You can read about them on page 3 and 4 of this old vandercook sell sheet here:
They have a screw on top to tighten them in position, and a screw in the back to tighten the spring to put pressure on the rollers against the drum. However, in the past, no matter how much I tightened them there wasn’t enough pressure to actually hold paper to keep it from getting loose and slurring/losing register.
Looking at it more thoroughly for the first time I noticed another screw on the back of the rollers and realized they were pushing the rollers back against the spring and away from the cylinder, so as long as those screws are there, I wouldn’t get enough pressure. That flat head set screw has it’s own hex set screw.
In the picture below I’ve circled where the set screws go. Once I removed those screws, I was able to push the sheet rollers against the cylinder with suitable tightness to actually hold the paper against the cylinder.
My only guess is that the set screw pushes the roller back so that it’s not too tight. I’m just not sure how to best adjust this, or if that screw is even needed. Anybody have any experience with this? Or thoughts?