Might need to pull the side cover (control panel side) and adjust the upper roller to get it as level as possible. I've had to do that to ours a couple of times over the past couple of years. Overall I'm really happy with it though. I did modify the other side on ours as well to make the takeup roller run the other direction. The way it comes it rolls the material back up face in which really annoyed me. I posted it about it a few year back when I got ours. Essentially you relocate a couple of the gears so that you can route the chain on the other side of that pulley. We have literally run hundreds and hundred of full 54" and 60" rolls, roll to roll on ours with less than a quarter inch of drift.
On adjusting the level of the top roller, you will see the bolts to adjust that once you remove the side cover. I just raise the roller and then lower it back down until I just see the first edge touch. Then make and adjustment and raise/lower it again. Take about 2 tries and can get it perfect. Helps to have good light on the other side to see the gap when you do this. With this method you do not need any scales. PS - easy to drop the screws for the side cover down inside. Use a magnetic screwdriver to alleviate that...
I'm honestly just fed up with this piece of garbage. taking a Baseball bat to it right now. Ordering a GFP
Ever thought about a RollsRoller or similar table? Tables will laminate and mount prints to boards fast as lightning without excess waste that you might encounter with a traditional laminator. The only bad thing is you're pretty much limited by the width and length of the table as to what you can laminate.
We're a very high production shop, laminating multiple rolls at a time. That unit won't cut it.
I have an RS and it was a battle until I figured out a few things.
Biggest one is making sure the lead edge is absolutely square to the edge of the material. Close does not count. Super close does not count. It has to be near perfection.
Then I learned a trick from a laminator sensei. Two layers of two inch masking tape 1/32" back fro the lead edge.
This does three things. First it makes the vinyl lay flat and virtually eliminates waves/bunching.
Second thing is it gives a reference line against the nip point. I feed the taped edge just until caught at the nip point. Then I stand to the side and sight down the top roller to the tape. If it looks square you're good to go.
Third bit is if it isn't square you can easily reverse. Laminate doesn't stick to masking tape.
Long sheets and full rolls need some time of feed system too. Some time ago I posted my Rube Goldberg infeed.
When all is said and done I can lam a 50yd roll within a 1/4". And it's done by what many here consider a junk laminator.
Remember kids, laminating is an art, not science. Until you take the time to figure out what your particular device wants you will fight a losing battle.