Raft warping (Makerbot Replicator+)


Quick thing: Please tell me if I misuse any of the terminology

On a replicator+, I have been printing successfully for a while, when suddenly the raft started to warp. I was doing a bunch of models that covered the whole tray, so I shrunk to just a small area, but It still warped I read up on how to fix, but most covered how to fix warping in the model itself, not the rafting. Some said to lower the temp, would that work? smart extruder at default settings, 215 C. The printer does not have a heated base, nor have I treated it with anything, and I am using it with the stock program (makerbot print). Otherwise, I am using it as it came out of the box.


Jake Faulkner

Posted 2018-02-12T20:21:28.503

Reputation: 43

you can consider the raft and the part to be one and the same. A raft will not necessarily prevent warping, as you've discovered. Please consider to edit your post to indicate your heated(?) bed temperature and surface treatment (glue, blue tape) and bed material (glass, aluminum, PEI). – fred_dot_u – 2018-02-12T20:56:30.163

@fred_dot_u Jake Faulkner said "The printer does not have a heated base". – Ljk2000 – 2018-02-13T20:48:30.413

@Ljk2000 I added that after he suggested it – Jake Faulkner – 2018-02-13T22:23:09.110

@fred_dot_u Looks like I own you a apology. Sorry! Thank you Jake Faulkner for telling me! – Ljk2000 – 2018-02-14T06:49:44.190



I'm not sure I am reading your post correctly, but if you are doing a batch of small prints, I would recommend to space them enough so as each of them has its own mini-raft, rather than all of them sharing the same large one.

If you are using cura, you can tweak how much the raft goes past the footprint of the part. Unless you are printing very small parts, you don't need that to be a lot.

In general, you should think to a raft as a print in and by itself: the larger it is, the more prone to warping, although the way filament is layered with gaps makes the raft bend and warp a lot less than a regular print of the same size.


Posted 2018-02-12T20:21:28.503

Reputation: 4 437

Currently I am using the stock program(makerbot print). Are there advantages to using cura over it? I think I will try the mini-raft – Jake Faulkner – 2018-02-13T14:56:34.790

@JakeFaulkner - I don't have experience with Makerbot Print, Cura and Slic3r (Prusa Edition) are two solid choices when it comes to FLOSS though. Cura expecially has very granular settings that allow for a lot (somebody say: "too much") tweaking. – mac – 2018-02-13T16:40:48.113


Lowering the raft temp to 200 degrees C should help. You should also apply hairspray and purple gluestick to your entire printed to help with raft adhesion to the bed.

TECTEC3 Studios

Posted 2018-02-12T20:21:28.503

Reputation: 416