How often do you replace pinch rollers?

How often do you replace pinch rollers? Our cutting is a bit off but inconsistent so figured Id give that a shot.

 

Hmm, ours is 2.5 years old and probably don't use it near as much as you. Think I need to look elsewhere?

 

Cutting is randomly off. It had been spot on for 2 years even with really long runs but recently it's been unpredictable. Sometimes it's spot on and others it trashes the job. We started using more intermediate marks and that took care of it for awhile but its doing the same thing now with them too. It's a mimaki cjv150, left that out to avoid everyone saying that was the problem.

 

Didn't think about that but the cuts themselves are pretty consistent as far as depth and ease of weeding goes. I don't feel any cuts but Ill check it out better tomorrow.
We never do perf cuts, it took so long to dial in our Roland that I swore I'd never do it again. I used to keep multiple spare cutting strips and change them out regularly on perf jobs.
Might change my USB cable, that seems to be the equivalent of the overseas tech support telling to you unplug and plug back in your router when the internet is down.