There are several different conditions that could cause this: Check the distance between the overlap carriage (or stop rollers) and the last, bottom high speed roll. If the distance is less than the sheet length, then the tail of the cut packet will hang on the end of the high speed tape section and the […]
Author: Scott
What can I do about static buildup when sheeting coated material?
Static bars are the best defense against this problem. Maxson sheeters utilize as many as 5 static bars on a sheeter. One bar is mounted above the rubber coated squeeze roll to neutralize static buildup in the cutter. The remaining bars are mounted in the delivery section, in both the high and low speed tape […]
When sheeting a soft coated material, the Operator notices tape marks. The marks do not extend along the entire surface of the sheet. Where is this occurring, and how can I solve it?
This type of tape mark is likely caused by setting the pinch at the overlap carriage too tightly. To be certain, take samples of sheet packets from the high speed tape section, prior to overlapping and samples in the slow speed tape section prior to stacking. If the cause of the tape marks is the […]
I notice full length tape marks on the cut sheet. Where is this occurring, and how can I solve it?
Tape marks are more apt to happen when sheeting heavier caliper stock and highly coated materials. The markings originate in the high speed tape section at first pinch point of the top and bottom tapes. This problem can be corrected by allowing for more space between the 2 sets of tapes. Reduce the tension on […]
I had been running my sheeter without any sheet squareness problems, but lately when I sheet 3 or 4 piles across the width of the sheeter, the sheets on the drive side are out of square. What can I do?
There maybe several causes contributing to “out of square” sheets. It is best to work your way through the cutter, correcting any maladjustment you encounter. First, make sure the top slitters are set properly against the bottom rings. If the top slitters penetrate into the web flow too much, the web will deflect and wrinkle. […]
I am running four rolls of paper, splitting it in half at the slitter section prior to cutting it. At the pile, the width of each pile varies noticeably. Why?
Are you taking an edge trim on each side of the rolls? Widths vary to within 0.015” (0.38 mm) from roll to roll. When put on a roll stand, incoming webs can wander as much as 0.125” (0.17 mm), particularly from the furthest roll stand. To ensure width accuracy on multiple pile work is maintained, […]
When I run two rolls of board on my machine, the sheets are not the same length. Why?
This effect is called “stair cut” and is common on all sheeters when multiple webs are pulled in through the draw roll. Basically, what happens is the bottom web wraps the draw roll at a given angle and diameter. The second web wraps the draw roll at the same angle and diameter plus the thickness […]
When I slit and run two piles, one sheet is square and the other is out of square What adjustments can I make to address this?
Be certain there is enough tension to keep the web taut and the slitters are set properly. Watch the flow between the pull roll section and tape take away section. Make sure the material is staying flat through the cutter. (This is done on MAXSON sheeters using air washed doctor boards.) In the tape take […]
When I slit and run two piles, I have trouble with wrinkles on one side. How can I resolve this problem?
There are several things that might be causing wrinkles: Check the roll stand brake pressure to be sure the web is taut across the width of the sheeter. Be careful because if too much tension is applied, you will get short sheets. Measure the slitter penetration. You need to have the top blade overlap […]
I’m having trouble running 0.024” (400 gsm) thick board on my stationary bed knife cutter. The leading edge has a lip or “bead” on it and the trailing edge is fuzzy. What can I do to fix this problem?
Both problems are caused by material flow through the knife area and knife cut angles. There are a few areas you can look at to solve this problem. The first thing to try is repositioning the doctor boards before the bed knife to give it more of a “water fall” effect or steeper approach angle […]
