<p>Likely the extruder gear is slipping on the filament. The tension arm may be weak or broken. It's also possible that there's a partial clog.</p>
<p>Whenever you get curved paths not adhering in place but getting &quot;pulled&quot; straight across the curve, the forces pulling on the extruded material from the nozzle moving are exceeding those making it adhere to whatever it was supposed to adhere to below. This can especially happen on overhangs, where there's low contact with what's below, or in cases like over a raft or support where there's a gap and it's intended not to strongly adhere to anything below. However, if the right amount of material is being extruded, and if it's sufficiently melted before extrusion, there should be very little force trying to pull it out of place. This leads me to believe there's some extrusion problem going on.</p>
<p>If you can't find anything wrong, you can try just going slower on the first layer after the raft, or using a hotter nozzle temperature. In the big scheme of things, 50 mm/s is a really low print speed, but for someone new to 3D printing, using a stock Ender 3 that likely has lots of little problems you're going to have to find and fix, it's at least an &quot;above average&quot; speed for a first layer, and I'd try just reducing that.</p>

CC BY-SA 4.0
2023-06-22T20:41:46.983Z
I think the extruded gear is ok, as I checked yesterday when changing filament- I think your other suggestion about nozzle partial blockage is probably the cause! Thank you!
Matthew Dresser
CC BY-SA 4.0
2023-06-22T17:31:34.800Z
2023-06-22T17:31:34.800Z
R.. GitHub STOP HELPING ICE
<p>I’m fairly new to 3D printing but have managed about 10 parts successfully so far. On this print, there were some issues printing the raft, but by the final layer, it looked ok, so I let it continue. I was surprised to see that when trying to print the circular pattern, the filament seems to come unstuck from the raft and pull across.</p>
<p>Is this down to bed adhesion, or some post-processing setting? I’m running PLA at 50 mm/s. The bed temp is 50 °C and the nozzle temp is 210 °C.</p>
<p><a href="https://i.sstatic.net/YIAu4.jpg" rel="nofollow noreferrer" title="Partial 3D print showing the layers after the raft not adhering properly"><img src="https://i.sstatic.net/YIAu4.jpg" alt="Partial 3D print showing the layers after the raft not adhering properly" title="Partial 3D print showing the layers after the raft not adhering properly" /></a></p>

<creality-ender-3>
Why are the circular parts of this print not sticking to the raft properly
Matthew Dresser
# Why are the circular parts of this print not sticking to the raft properly

(Asked by: username_0 on 2023-06-22)

I’m fairly new to 3D printing but have managed about 10 parts successfully so far. On this print, there were some issues printing the raft, but by the final layer, it looked ok, so I let it continue. I was surprised to see that when trying to print the circular pattern, the filament seems to come unstuck from the raft and pull across.

Is this down to bed adhesion, or some post-processing setting? I’m running PLA at 50 mm/s. The bed temp is 50 °C and the nozzle temp is 210 °C.

[![Partial 3D print showing the layers after the raft not adhering properly](https://i.sstatic.net/YIAu4.jpg "Partial 3D print showing the layers after the raft not adhering properly")](https://i.sstatic.net/YIAu4.jpg "Partial 3D print showing the layers after the raft not adhering properly")

**Tags:** creality-ender-3

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## 1 answers

### Answer by username_1 on 2023-06-22. Score: 1 | Accepted answer

Likely the extruder gear is slipping on the filament. The tension arm may be weak or broken. It's also possible that there's a partial clog.

Whenever you get curved paths not adhering in place but getting "pulled" straight across the curve, the forces pulling on the extruded material from the nozzle moving are exceeding those making it adhere to whatever it was supposed to adhere to below. This can especially happen on overhangs, where there's low contact with what's below, or in cases like over a raft or support where there's a gap and it's intended not to strongly adhere to anything below. However, if the right amount of material is being extruded, and if it's sufficiently melted before extrusion, there should be very little force trying to pull it out of place. This leads me to believe there's some extrusion problem going on.

If you can't find anything wrong, you can try just going slower on the first layer after the raft, or using a hotter nozzle temperature. In the big scheme of things, 50 mm/s is a really low print speed, but for someone new to 3D printing, using a stock Ender 3 that likely has lots of little problems you're going to have to find and fix, it's at least an "above average" speed for a first layer, and I'd try just reducing that.

> **Comments:**
> **username_0**: I think the extruded gear is ok, as I checked yesterday when changing filament- I think your other suggestion about nozzle partial blockage is probably the cause! Thank you!  

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