# Top Layer(s) not completed **URL:** \ **Category:** Snapmaker Luban\ **Created:** [June 22, 2020, 8:49pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240 "2020-06-22T20:49:15Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![KML](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/kml/32/5252_2.png) [@KML](https://forum.snapmaker.com/u/KML)\ **Post date:** [June 22, 2020, 8:49pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/1 "2020-06-22T20:49:15Z")
![image](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/2/2ec5045d07fdfe2b74302d807ed16c9ce1fb583a.jpeg) It seems that the last layer is not be sliced correctly (Luban 3.5). Due to this, also the machine (A350) ist not completing the top layers … Small holes … (PLA; 200 C; 60 C, Normal; Shell 1,2mm) THX for ideas! ---
**Author:** ![clewis](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/clewis/32/3255_2.png) [@clewis](https://forum.snapmaker.com/u/clewis)\ **Post date:** [June 22, 2020, 10:36pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/2 "2020-06-22T22:36:09Z")
Do you have a picture of the bad print? In Luban, once you slice, adjust the slider bar down to the first layer. Does the travel head movements match the print? The first layer is particularly susceptible to over/under extrusion issues, so it might not be a slicer issue. ---
**Author:** ![KML](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/kml/32/5252_2.png) [@KML](https://forum.snapmaker.com/u/KML)\ **Post date:** [June 23, 2020, 5:43am UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/3 "2020-06-23T05:43:18Z")
Sorry, was my mistake - I´m talking about the top layer(s) - bottom is fine. I use the same .stl file on another printer (with S3D) , this works fine … ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [June 23, 2020, 12:47pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/4 "2020-06-23T12:47:38Z")
Hey, try to calibrate your flow (also know as e-steps). I had about 10% underextrusion after assembling. ---
**Author:** ![KML](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/kml/32/5252_2.png) [@KML](https://forum.snapmaker.com/u/KML)\ **Post date:** [June 23, 2020, 6:12pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/5 "2020-06-23T18:12:53Z")
THX a lot, I´ll try 😃 ---
**Author:** ![KML](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/kml/32/5252_2.png) [@KML](https://forum.snapmaker.com/u/KML)\ **Post date:** [June 24, 2020, 9:41am UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/6 "2020-06-24T09:41:32Z")
I adapted the flow to plus 10% (1,1 in S3D), but the result was the same 🤨 ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [June 24, 2020, 11:51am UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/7 "2020-06-24T11:51:56Z")
You have to adjust your e-steps, I guess flow in s3d is not the same. Next thing would be to adjust your linear advance, look in the forum or Google. (my k-factor is set to 0.09, others here use 0.08 instead of original 0.22) Hope this helps. ---
**Author:** ![KML](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/kml/32/5252_2.png) [@KML](https://forum.snapmaker.com/u/KML)\ **Post date:** [June 24, 2020, 3:43pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/8 "2020-06-24T15:43:21Z")
THX a lot for “hearing me”! So all I have to do ist to write in the luban console: **M900 K0.08 ; set k-factor** Is this right? THX!!! ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [June 24, 2020, 4:54pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/9 "2020-06-24T16:54:45Z")
This would only work if you are connected with USB, no wifi. After the command you have to save with M500 Hope this helps! ---
**Author:** ![KML](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/kml/32/5252_2.png) [@KML](https://forum.snapmaker.com/u/KML)\ **Post date:** [June 24, 2020, 5:22pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/10 "2020-06-24T17:22:50Z")
I did so … We will see! THX again!!! ---
**Author:** ![JohnFiott](https://avatars.discourse-cdn.com/v4/letter/j/5f9b8f/32.png) [@JohnFiott](https://forum.snapmaker.com/u/JohnFiott)\ **Post date:** [July 3, 2020, 1:40pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/11 "2020-07-03T13:40:24Z")
Please update us with any outcome. I am starting to regret using a Wi fi connection because I miss out on much of the potential. But my machine is in another room and too distant for a USB connection. ---
**Author:** ![Dojima](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/dojima/32/3696_2.png) [@Dojima](https://forum.snapmaker.com/u/Dojima)\ **Post date:** [July 5, 2020, 4:23pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/12 "2020-07-05T16:23:58Z")
Trying out [https://marlinfw.org/tools/lin\_advance/k-factor.html](https://marlinfw.org/tools/lin_advance/k-factor.html) to run some tests. Where can I find the acceleration speed for my A350? The default shown is 500mm/s in that generator. Thx ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [July 5, 2020, 5:11pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/13 "2020-07-05T17:11:48Z")
With M503 you can see the M201, I guess this is the acceleration, can’t find in the forum with my phone… ---
**Author:** ![Dojima](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/dojima/32/3696_2.png) [@Dojima](https://forum.snapmaker.com/u/Dojima)\ **Post date:** [July 5, 2020, 5:17pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/14 "2020-07-05T17:17:04Z")
Thanks, I just removed it from generated gcode, so presume it uses firmware default. ---
**Author:** ![KML](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/kml/32/5252_2.png) [@KML](https://forum.snapmaker.com/u/KML)\ **Post date:** [July 6, 2020, 8:28am UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/15 "2020-07-06T08:28:51Z")
Sorry, for being a bit late: I tested with k-factor 0.08 - works better. All in all I think it´s also a matter of speed (A350). But now I am pleased with the results … (with S3D) THX a lot again!!! ---
**Author:** ![C.Harris](https://avatars.discourse-cdn.com/v4/letter/c/5f9b8f/32.png) [@C.Harris](https://forum.snapmaker.com/u/C.Harris)\ **Post date:** [July 6, 2020, 9:22am UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/16 "2020-07-06T09:22:19Z")
Mind posting a photo comparison? It just gives other members on here a good visual representation of how important it is to change linear advance value ---
**Author:** ![Dojima](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/dojima/32/3696_2.png) [@Dojima](https://forum.snapmaker.com/u/Dojima)\ **Post date:** [July 7, 2020, 10:36am UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/17 "2020-07-07T10:36:29Z")
Circling back, yup K 0.08 makes a big difference using the test generator sample. However, has helped for prints that have small gaps, I had a problem that they would always end up welding together. ![Screenshot 2020-07-06 at 19.40.14](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/4/4731820b23a4b40deb9d2d80f5c1b3c610b5449d.png) My default print speed is 60mm/s Nice improvement lowering the K-factor for fine work. Notice the gap in the middle is clear. Ignore the quality of the second print, turns out K 0.10 was best for me but I took these at 0.08. ![IMG_1595](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/d/d64cc440ba0ee53ac13cbe2410facf277ba0d8c0.jpeg) Also can effect retraction, before: ![IMG_0506](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/d/dee3ef672a8e7396eaeaf7fce741b88a290885cc.jpeg) After: ![IMG_1747](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/d/d0d1fa2b98b09757da519cdc6ab4168b002b7b75.jpeg) ---
**Author:** ![Nitro1980](https://avatars.discourse-cdn.com/v4/letter/n/87869e/32.png) [@Nitro1980](https://forum.snapmaker.com/u/Nitro1980)\ **Post date:** [July 18, 2020, 2:16pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/18 "2020-07-18T14:16:52Z")
What is the best way to Calibrate your e-steps and k-value? ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [July 18, 2020, 6:42pm UTC](https://forum.snapmaker.com/t/top-layer-s-not-completed/7240/19 "2020-07-18T18:42:02Z")
Calibrate your extruder: > **[Extruder Calibration: 6 Easy Steps to Calibrate Your Extruder | All3DP](https://m.all3dp.com/2/extruder-calibration-6-easy-steps-2/)** > > Is something strange about your 3D prints? You may need to calibrate your extruder! Read on to learn how to do the extruder calibration. Calibrate your Linear advance (I would suggest you a k-value between 0.08 and 0.1, I use 0.09): > **[Linear Advance Calibration Pattern](https://marlinfw.org/tools/lin_advance/k-factor.html)** > > Create Gcode to calibrate LIN\_ADVANCE setting