Over the last few months it seems that the carriage of my SP 15 has become more and more difficult to roll down the press bed. In both trip and print modes, the carriage seems heavy. I recently compared the action on my press to another SP 15, and the difference was noticeable; that press was comparatively easy to roll through. I’ve oiled all the points I can think of, and the bed bearers and surfaces that contact them are clean. Any ideas? My right arm is starting to hurt fter just a few prints…
Eric, a loose drawsheet is a good guess. Normally packing shouldn’t be a problem when the carriage is in trip. But I have seen a lot of very over-packed cylinders.
It wouldn’t be a packing problem if it is resistant in both trip and print. Otherwise I’d suggest that packing had slipped and was getting between the bearers; that will slow you down immediately. How about cylinder bearings? Is there any jerkiness to rotation?
This will be difficult to diagnose without being on site. Have you tried to crank it without a form in the bed? Is your form at .918? Perhaps your cylinder is overpacked for the paper you’re using.