# Bad prints out of brand New Form 3 **URL:** \ **Category:** Form 3/3+\ **Created:** [November 11, 2019, 3:28am UTC](https://forum.formlabs.com/t/bad-prints-out-of-brand-new-form-3/25346 "2019-11-11T03:28:14Z")\ **Posts on this page:** 1\ **Showing post:** 286
**Author:** ![rkagerer](https://avatars.discourse-cdn.com/v4/letter/r/439d5e/32.png) [@rkagerer](https://forum.formlabs.com/u/rkagerer)\ **Post date:** [May 4, 2020, 11:45pm UTC](https://forum.formlabs.com/t/bad-prints-out-of-brand-new-form-3/25346/286 "2020-05-04T23:45:58Z")
@Oskar_Nissen’s test reminds me of my [Graduated Cubes](http://forum.formlabs.com/t/graduated-cubes-calibration-print/23269) “calibration” print. Out of curiosity, I recreated and ran his test in Black V4 on my Form 2 and Form 3 to compare. [![](https://i.imgur.com/1rFiNly.png) ](https://i.imgur.com/1rFiNly.png) Here are [my files](https://tinyurl.com/formcubes). I enlarged each dimension of the recess by 0.1mm for snap fit clearance, and engraved numbers on one side of the cubes to track any variance across the build platform. I used 0.4mm supports, and removed the supports Preform generated at the “apex” of the recess. I’m not sure what layer height was used for the original Grey test, so I used 100μm. [![](https://i.imgur.com/nTF47DB.jpg) ](https://i.imgur.com/nTF47DB.jpg) I had much better results in Black than his prints in Grey. The Form 2 cubes have the signature layer outline on their top surface. The Form 3 top surface lacks that artifact, although I think it shows signs of what looks like longer exposure. [![](https://i.imgur.com/vq4ckIl.jpg) ](https://i.imgur.com/vq4ckIl.jpg) X and Y dimensions are reasonable on both, and better on the Form 3. Note I haven’t done any fine tuning calibration on my Form 2. [![](https://i.imgur.com/I8dOni1.jpg?1) ](https://i.imgur.com/I8dOni1.jpg?1)[![](https://i.imgur.com/h0IgMJl.jpg) ](https://i.imgur.com/h0IgMJl.jpg) I didn’t see any of the bowing of the top surface which he encountered. There’s a bit of bowing toward the corners on the bottom (platform-facing) surfaces, as you move further away from the supports, but that’s to be expected. Overall Z accuracy was off by about 3% on both. [![](https://i.imgur.com/wQ69vVe.jpg) ](https://i.imgur.com/wQ69vVe.jpg)[![](https://i.imgur.com/Gw0cboL.jpg) ](https://i.imgur.com/Gw0cboL.jpg)[![](https://i.imgur.com/mfkyIoT.jpg) ](https://i.imgur.com/mfkyIoT.jpg) The Form 3 produced a squarer peg, although this particular one had a flake of cured resin hanging off the bottom (which was easily removed). The Form 2 had a bit of peeling on one corner of the bottom surface. These defects weren’t present on all the cubes. [![](https://i.imgur.com/z1bgoTA.jpg) ](https://i.imgur.com/z1bgoTA.jpg)[![](https://i.imgur.com/3KM80tA.jpg?1) ](https://i.imgur.com/3KM80tA.jpg?1) The pegs on the Form 2 were all squashed on the bottom corner adjacent to the single peg support. The pegs were **consistently** more square on the Form 3. I think this speaks to the potential of the Form 3 LFS peel mechanism to overcome warping which would otherwise require more supports to avoid on the Form 2. [![](https://i.imgur.com/ZBb2RQt.jpg) ](https://i.imgur.com/ZBb2RQt.jpg) I should point out this is a sub-optimal and challenging orientation for any SLA machine to print cubes and the peg overhang. Here are the side surfaces. One thing I did notice on some cubes (from both printers) is the layer lines on the surface facing the mixer / wiper weren’t as clean as those on the opposite surface - but it wasn’t consistent across all the samples. [![](https://i.imgur.com/Jq6DfOa.jpg) ](https://i.imgur.com/Jq6DfOa.jpg)[![](https://i.imgur.com/Br1rE4b.jpg) ](https://i.imgur.com/Br1rE4b.jpg)[![](https://i.imgur.com/xNnqbTr.jpg) ](https://i.imgur.com/xNnqbTr.jpg) Lastly, the Form 3 prints were MUCH more difficult to remove from the build platform than the Form 2 ones. My Form 3 really goes overkill at times on raft adhesion. Has anyone else noticed the same? --- _[View the full topic](https://forum.formlabs.com/t/bad-prints-out-of-brand-new-form-3/25346)._