#4 Trip Rack Issues

Greetings everyone. I’m wondering if anyone has advice, pictures, and/or reference to the desired positions of the cylinder trip rack and the gripper trip lever assembly.

Earlier today I adjusted the bearings on my #4, following the great advice of other Vanderblog members. In order to reach the eccentrics on the non-operator side, I had to remove the steel plate that covers the trip rack. Once I had the bearings adjusted properly, I reinstalled the trip rack, but can’t for the life of me find the proper setting.

Possibly connected to this is the position of the gripper trip lever. I’m wondering how far out the fulcrum and the set screw should be for proper press operation.

4 thoughts on “#4 Trip Rack Issues

  1. Paul Moxon, Moderator - December 3, 2009

    The distance is 1 9/16, but what matters is that the trip lever is parallel to the side of the carriage.

    To shit the carriage to trip stick a pin wrench or screwdriver in the hole on the brass eccentric collar (MB-101, sheet 106) and turn toward the feed board.

  2. brad - December 2, 2009

    Thanks for your comments, Paul. I’ve got that schematic, and found it helpful. Trying to figure out approximately how far from the press the trip lever should be. I’ve made a note on the picture here.

    Back to the trip rack, I’m trying to figure out what exactly causes the trip shaft to rotate and cause the trip rack to either raise or lower on its gears. It seems like it should be something to do with the bearer at the base of the trip rack on its path.

    The problem I’m having is not being able to get the carriage back to the feed board so I can reinstall the trip rack on its gears. Since I removed the face plate covering the trip rack, while the carriage was in the center of the bed (as I was, originally, adjusting the bearers), I can’t seem to get the rack on in the correct position to move the carriage back to the feed board.

    A second set of hands would definitely help, as all of this is going on opposite the operator’s side of the press.

  3. Paul Moxon, Moderator - December 2, 2009

    This schematic (from Sheet 106 of the operator’s manual) show the position of the set screw.

    There are other reasons why the grippers may not raise enough:
    1) Push rod does not contact the trip bar on the paper gripper assembly either the assembly is misaligned or the trip bar is misconfigured. (See sheet 104)
    2) Gripper stems are dirty or bent
    3) Gripper guide (LR-109) collar is crimped

  4. Paul Moxon, Moderator - December 2, 2009

    This photo shows the position of the trick rack with the carriage at the feed board.

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