Print Striations/Ridges

On some prints with the Form 2 we are getting striations on the surface that seem to be a many layers thick and large enough to feel. They start at the edge of a feature on the part and then continue across the remaining width. I’ve included a couple close up pictures to show what I’m talking about.

What I’d like to know is how does this happen, and what can I do to eliminate or minimize the likelihood of this happening.

Hello there @aeroscarr13!

This is a terrific question, and a situation that we’ve seen a few times! The cause is actually pretty simple.

It’s an odd characteristic of PreForm that, if you have zero-thickness gaps between two parts of a model, these lines will extend out across the entirety of the part. As you can see in the pictures you attached, all these lines come directly off the corners of the smaller blocks. I’m guessing the smaller blocks and the larger sheet under them are just barely touching(technically both touching and not touching, “zero thickness gap”).

The solution for this is equally as simple! You’ll just need to have the two parts intersect a little more so you get some more overlap. Once you do that, I suspect your next print will come out just fine. :slight_smile:

I hope that’s helpful! If you’re still having problems please don’t hesitate to reach out to our support team at the link below and we’d be more than happy to give you a hand.


Thanks for this. This has been bothering me also for some time now. I thought it was a problem with resin tank and layers not peeling off correctly.

Nicely said :stuck_out_tongue:

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