K2 strandard hitting back right corner before every print

Flagship K Series Creality Flagship K2 Pro & K2
1

Hi all, new member and first post.

I bought K2 standard 2 months ago, everything was working fine until yesterday,

I turned on printer and send file to print, than i heard hitting and squealing plastic on plastic, What happened is that printing head hit back right corner plastic during auto level before printing.

It happens ONLY during auto level just before the print, if i initiate auto level/calibration manually , from printer interface or Fluidd , there is no problem. No errors shown when this happens.

No update/upgrade was done before this problem, generally nothing changed ,everything is default .

To fix the problem I tried using different version of Creality Print ,

upgraded firmware,

checked for loose screws, belt tension

Also did x,y motor calibration, Nothing worked

In the video

you can see and hear the problem.

Any help would be much appreciated

Thanks

2

こんにちは。
今回のプリントデータAとしましょう。
昨日まで出来ていたデータはAですか、Bですか？
データAはstl又はGコードですか？もしくはそれ以外？
以前、
他のトピでGコードに１文字不要なものが書き込まれてエラーとなったとありました。

データBでも起きるか確認してみては如何でしょうか
同じ現象が起きるなら本体の問題に絞られると思います。

3

Thanks for reply @usagi

I print only from step and stl files, never used send g-code to printer. so routine is CrealityPrint–> Slice –> Print button.

4

こんにちは。
そうでしたか。そうするとデータBも同じですね。
お役に立てなくてすみません。

5

Hi, I would like to join in on the solution request , I have the exact same problem since very recently on an almost brand new base K2.

6

So i am not alone,

I am in contact with creality support, but not much help so far, things they suggested I already did with no luck.

Here is the summary what i already did to try to fix the problem:

- upgraded firmware,

- using different version of Creality Print ,

- checked for loose screws, belt tension, everything ok there

- Also did x,y motor calibration.

- Factory reset (suggested by support team)

Nothing helped.

Strange thing is that problem happens only before print, it looks like printing head goes to far back and hitting plastic during pre-print probe

If I run auto level/calibration manually, from printer screen or Fluidd, there is no problem.

7

こんにちは。
Crealityのサポート。
私はヒューマンチャットサポートにしてます。
待つ時間が掛かりますが、ちゃんと対応してくれました。
2番目はAIサポートです。色々考えてくれます。
３番目は商品など購入したアドレスにエラー状況を送ります。
４番目はチケットサポートほとんど利用しません。

AIサポートの回答
K2のホットエンドが後ろにぶつかるなどの異常な動きについてご質問ありがとうございます。
知識によると、ホットエンドの異常な動きは必ずしも歪みセンサー（Strain Gauge）エラーだけが原因とは限りません。
歪みセンサーはレベリングや押出の検出に関わる重要な部品ですが、異常な動きがある場合は以下の点もご確認ください：
・ ホットエンドの物理的な障害物やケーブルの干渉がないか
・ファームウェアの設定やキャリブレーションが正しく行われているか（特にInput ShapingやAuto Levelingの検出）
・ サーボモーターや軸のキャリブレーション状態
以上。

メールの回答よりは親切なような気がします。
私のエラーはプリント中にノズルが変な位置に止まり、中止ボタンを押したら
ノズルがビルドプレートに当たりプレートを削りながら後ろに下がりました。
原因が歪みセンサーエラーだったのでAIに聞いてみました。
エラーは他人事ではないので私も調べます。

8

Well I found workaround which doesn’t fixes the problem, but at least i can print without fear of hitting and scratching and maybe destroying something.

If I use OrcaSLicer 2.3.2 Host Type: Octo/Klipper Print agent: Orca, the problem disappears no hitting everything works as it should.

But If i use OrcaSLicer 2.4.0-beta, which adds lots of support for creality printers, using Host Type: Creality Print, and Print Agent: Creality print, the problem appears, the same as before.

Still waiting for the response/suggestions from creality support team, hopefully they come up with the real solution.

1 Like
9

I had this problem very early. I’ve had this machine since Dec. mine slammed in the back right corner.

This may not be helpful but have you tried applying earlier firmware versions and stepping into the current from there ? As I remember it solved my issue.

10

Initially i was on default(earlier version) firmware when this happened, then i upgraded. but didn’t fix the problem.

Anyhow, since i was in contact with creality support, they found in logs i sent, that printing head cable is faulty, so they are sending me replacement,. I will post an update after i replace the cable, in about 10 days :slight_smile:

1 Like
11

I’m sorry, but I guess you misunderstand the complete process. Given the source of the data STL or STEP or whatever a given slicer can handle, the spacial data must be sliced and converted to gcode for each layer. The printer only understands each gcode instruction. The printer cannot do anything with the STL or STEP data.

12

You are right it looks like i misunderstood ..but reading google translate from Japanese , my understanding was that Usagi refers to manually writing g-code, and maybe that is the cause of problem ..

Thanks for the heads up , and next time maybe you could provide some solutions for solving the problem……

13

I’m experiencing the same problem too. It has happened from the first day on. I use Creality Print 7.1 for all slicing and sending to print from Creality Print. It happens prior to the actual print, not while printing, just initial start. It happened from the first time I started the printer before running a file.

I’m expecting a second K2 Pro tomorrow and I’ll see if the same happens.

14

I think i found a fix:

I had the same issue where my Creality K2 started scraping/hitting the back wall with the rear of the toolhead during the start sequence, around the nozzle wipe / 3-point probing routine.

After checking the Klipper console logs, I found that the printer was running a PRTouch/nozzle-clear probing move at:

Y265.5

This is slightly outside the normal safe Y travel on my machine, where around Y263 was the practical limit before the toolhead contacted the rear wall.

The problematic values were in:

/mnt/UDISK/printer_data/config/printer.cfg

These lines:

prth_clr_probe_pos = 85, 265.5#95, 266.5
prth_clr_pose = 160, 265.5, 10#153, 266.5, 10

I fixed it by moving the PRTouch/nozzle-clear positions forward from Y265.5 to Y263.0.

Command-line fix:

cd /mnt/UDISK/printer_data/config

cp printer.cfg printer.cfg.before_prth_y2655_fix

sed -i 's/prth_clr_probe_pos = 85, 265\.5/prth_clr_probe_pos = 85, 263.0/' printer.cfg
sed -i 's/prth_clr_pose = 160, 265\.5, 10/prth_clr_pose = 160, 263.0, 10/' printer.cfg

grep -nE "prth_clr_probe_pos|prth_clr_pose" printer.cfg

Manual fix:

Open printer.cfg in Fluidd/Mainsail or over SSH:

/mnt/UDISK/printer_data/config/printer.cfg

Find these two lines:

prth_clr_probe_pos = 85, 265.5#95, 266.5
prth_clr_pose = 160, 265.5, 10#153, 266.5, 10

Change them to:

prth_clr_probe_pos = 85, 263.0#95, 266.5
prth_clr_pose = 160, 263.0, 10#153, 266.5, 10

Then restart Klipper:

RESTART

After this, the probing/wiping routine no longer drove the toolhead into the rear wall. For some machines, Y263.5 or Y262.0 may be a better value depending on clearance.

15

Just a little update…

I received replacement print head cable, but they have sent me the wrong one, so they are re sending, hopefully correct one..another 10/15 days waiting…

Miczils i will try your fix, and see what happens. The strange thing is that printer worked fine, and suddenly not, i didn’t mess with configurations etc. From the logs i sent to support, they said it is faulty print head cable..

16

Another update…

At the end creality support send me message saying after further investigation new cable they sent me will work, and that they won’t be sending new one….missing wires are not important, and now cable, since is shorter about 10cm goes over pcb and flat cable, they said it wont hurt…

Bottom line, I’ve replaced the print head cable, but it didn’t solve the main problem, hitting and scratching..

I sent new video with the problem, i got response that is everything ok. So i had to remind them to turn the volume up so they can hear hitting.. The last response i got from support team is that problem is in assembly, “some plastic is not screwed right” or something like that…

The problem persist, i tried Miczils solution, and that works, but it is workaround, and i’d like to see some real fix. At least to find out what caused the issue, after printer working fine for 2 months, and suddenly not.

17

Well, after upgrading to new firmware V1.1.6.3, there is no more hitting and scratching.

So far it looks that fixes it.

1 Like
18

こんにちは。

回復おめでとう。

「組み立てに問題があり、プラスチック部品のネジが正しく締められていない」といった内容でした。
どこの部分でした？
締め直したのですか？
気になります。 :sweat_smile:

19

the printer thinks its the new creality klintek and want to change the tool head :rose:

20

The thing is there was no lose screws, plastic, parts…everything was ok. That was suggestion from Cr support, even after i wrote to them what troubleshooting i’ve done… anyhow it was “long month” :slightly_smiling_face:

With new firmware, i think they’ve removed that part of the “pre print” routine, print head no longer goes to that corner at all.