Paul – That SP15 I sold to your friends at Old Dominion last year is having a problem with uneven inking = uneven pressure from the main ink drum. My guess is that, since it is spring-loaded, that either the spring has failed/is failing or that there is a build-up of ink and solvent coming between the drum axle and the top point.
I have explained this to Nikki and her school tech guy is going to be looking into it – after he “reads up on it a bit”. Well, since I could not find any illustrations or reference to this problem anywhere else, I figured I should come to you for advice to be shared with Nikki and her tech guy.
Do you have an illustration of the end mounts of the main ink drum for the SP15? Have you encountered this problem before yourself? I have had the drum off of a Model 4, but never removed one from an SP15, so I am just guessing at the cause of her problem. But my “guess” is based upon what I consider to be a pretty fair understanding of how Vandercook designed and built these machines.
But this is something I have no encountered before. I will share any info and/or image links you might have with Nikki. She also reports that although their SP20 has the same setup, it has never resulted in any inking problem.
And, if the spring(s) have failed, is a replacement available from Fritz or some other source you are aware of?
Thanks in advance for your insight and assistance… and, btw, I see you have a new edition of the book coming out. Perhaps it’s time for me, too to upgrade my own reference library here. I will be in touch.
Hope all is well with you. Still muddling through over here….