I’ve got a 32-28. As I run the press, the screws that hold the form rollers at the correct height become very loose, causing the rollers to drop and strike the type improperly.
Viewing the pictures right and below, screws A and C go almost all the way through the
carriage [bearing bars] to bring the bottom of the [them] up against screw B. It seems that it’s screw B that comes loose, which then allows the other two to loosen and cause the rollers to become unaligned.
I’ve followed the operator manual in order to get all of the inking rollers parallel and at the right heights in respects to each other as well as the form. The two theories that I’ve been able to come up with are that the pressure of the rest of the inking system is great enough to cause the screws to loosen; or, the action of the carriage moving down the length of the pressbed is violent enough to shake them loose. I’ve set the limits of the action of the inking carriage so that it seems appropriate, but, well, I’m at a loss. I’ve spent too many nights perfecting the roller heights and then watching them quickly (like in 15 passes) come out of alignment. I’m wondering if other folks with similar machines (232?) have similar problems. I think this carriage system is sort of rare.
Any help is very welcome. Thanks for your time!