We use the V36 exclusively for crash numbering die cutting and perforating. About 2 years ago we could run up to eight perforations across an 8 or 11 inch wide stock, whether it was 3 sheet board or up to 4 sheet NCR. Then it started to pull out of the grippers and send the sheet around the rollers on say 3 sheet NCR and lately 2 sheet.
To help this problem, we have traditionally glued rubberised material tight to the perf, so the sheet can ‘bounce’ back on impression. I’ve moved the cylinder bands (#22202), completely out of the way of the sheet, as they’ve been bent many times over the years. Adjusted the cylinder brush back so it doesn’t touch the cylinder at all.
We use an approved metal ‘wrap’ for die cutting and perfs and the usual ‘Tiger’ strip when used in conjunction with numbering jobs. The packing is of course adjusted to that it’s not too heavy. I keep the grippers running with the flat side to the sheet to slightly increase the amount of grip.
The manual shows parts 22926 and 22925 as cylinder cams for opening and closing the grippers. Does anyone know if these are in any way adjustable ie place some thin metal behind and screw back in place? I noticed some definite wear on 22926 where it strikes what I think is the cylinder gripper cam roller (223150? I know the manual suggests the grippers are spring loaded and self adjustable, but I’m currently confounded and frustrated.
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