I’m having a problem with the grippers on my 10x15 Windmill. The press is running fine and the registration is good, but the underside of the grippers are rubbing on the tympen and the metal plate to the tympen. My question is…Is there an adjustment for how far the grippers open up?
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The grippers should be closed when moving over the tympan drawsheet. Are you sure the platen isn’t overpacked?
You are either over packed or the gripper bars are not level with the platen. Remove the tympan and rotate the bars toward the print position. Sight down the bar where it lies next to the platen and see if the tip is coser to the platen than the heel. If so, do not bend the bar. It is possible that the gripper bar holder (cast iron). is bent. With the propper tools it can be straightened, but it may be enough to just shim the gripper bars to get them at the same height and angle.
Does contact happen down whole lenght of arm or hub or tip ?