Need Help 10ft scrim tunneling in the middle

[FelixS]

We have an EFI 32r+ and have a big issue with materials wrinkling up in the center. It's done it with 13oz scrim, 18oz double sided scrim, mesh and no matter what I do it still does it after about 15' of printing on any roll I put on it no matter how good the initial tension is. The machine is super barebone just front and back pinch rollers and a vacuum on the print table which I keep all the way up when printing scrim and it still doesn't help. Is there something I'm missing or any tips and tricks?

 

[Gino]

Are you.... or do you have the means to relieve the tension by unrolling some of the material ?? It's not so much the tension from left & right, but how much weight it hasta pull up the causes most of that kinda buckling.

 

[balstestrat]

No idea about that machine so this might sound a little strange but have you tried to reduce the vacuum? It could help relieve the stress in the middle.

 

[FelixS]

No idea about that machine so this might sound a little strange but have you tried to reduce the vacuum? It could help relieve the stress in the middle.

The dial only goes to 10, but I've tried it from about halfway up. The material usually had smaller waves in it though that's why I keep it so high. I'll try it though.

 

[FelixS]

Are you.... or do you have the means to relieve the tension by unrolling some of the material ?? It's not so much the tension from left & right, but how much weight it hasta pull up the causes most of that kinda buckling.

I could spin some out as it's going through maybe? Usually when it's running, the pinch roller pulls and the material roller just free spins as it's pulled, I don't keep it tight. If that makes sense..