Checking grippers on Heidelburg 10 X 15 windmill

I am diecutting on my 10 X 15 windmill and I am having trouble with the sheet pulling out of the gripper and staying with the die in the chase. I am just starting to run this press and I am wondering if there is a good step by step guide to make sure everything is working properly. The press was dissassembled and moved through a 36” door and then reassembled again. Just want to make sure that everything is in good working order.
Thanks, Steve

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Does it feed OK off of impression? If so, does it do it on both grippers? If not you can adjust/clean your offending gripper.
Run the side guide all the way out to allow more paper to be gripped. Do you have enough ejection rubber on the die? If so, is the rubber clean and dry? Those are some ideas I would try… good luck! Maybe more ideas later…I’ve solved this problem a few times before!

Hi bppayne,

It feeds OK off impression, I am not sure how to run the side guide out to allow more paper to be gripped. The problem was solved by putting some ejection rubber around the die.
I am still wanting to know how to be sure that the grippers are properly adjusted. I feel as if the black rubber on the gripper bar is worn and maybe should be replaced. I am not sure where to get it and how to replace it.

Thanks for your help.

Hi bppayne,

It feeds OK off impression, I am not sure how to run the side guide out to allow more paper to be gripped. The problem was solved by putting some ejection rubber around the die.
I am still wanting to know how to be sure that the grippers are properly adjusted. I feel as if the black rubber on the gripper bar is worn and maybe should be replaced. I am not sure where to get it and how to replace it.

Thanks for your help.

The side guide adjustment is described in the manual.

I adjust the grippers by removing the packing and running the gripper down the platen about 2/3 of the way. Using some leads, I make sure the distance is even from top to bottom between the gripper and the bare platen. They are easily bent, so be careful, but if one is slightly out of alignment you can bend it until you have even spacing. There are other posts here on Briarpress that describe the process better than I just did.

I wouldn’t worry about the rubber, just make sure the grippers are clean and dry. I use aftermarket grippers that have no rubber. I don’t miss it.

If you are not running to guides be sure to change the top arm cam. I ran a job not to guides for 20 minutes and forgot to switch the cam. Sheets were dropping out and miss feeding as a result. As the press picks up a sheet let it feed in a little and shut the press down mid way down the platen. See if you can pull the sheet back out. If the grippers are in good shape you should not be be to remove it to easily. The rubber on the grippers helps the contact pressure. You can use electrical tape to build a pad just don’t go to far up. The grippers have springs built into them. Inspect the grippers to see of the springs are intact and not broken. Grippers can also crack along the screw base. I ran for 1.5 years with a cracked gripper, broken springs and tape in the gripper pads. After replacing the grippers it was like a new machine and I wished I had not waited so long. I bought an aftermarket gripper but not cheap China ones on not OEM either. My windmill guy had sold them for may years and I trusted his opinion and he was correct.

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