Question Tilted Bleed out size


New Member
Hi, I'm using Mimaki sij320 uv printer. I have faced problem on printing long feed tarpolin. For example, I use the tarpolin material (126"x1968") and I want to print design(120"x480") and I bleed out 4side 3inch. I'm using tension bar to print. The problem I faced is when I print long feed (120"x480") and the design tilted slightly and my top side bleed out is no longer 3inch at the middle of print and the bleed out of bottom side is getting extra. Do anyone can suggest the way to ensure tarpolin can run smoothly until end of printing without tilted?
Thank you.