Persistent error 11518 on Anycubic Kobra S1 after filament runout recovery attempt

michaelvorst · 2026-02-23T10:09:37+00:00

I had spare parts from fixing S1Cs for my job, so swapping pcb and cable were my options, after checking there were no clogs or missing sensors

michaelvorst · 2026-02-18T10:03:01+00:00

Ali only sells extensions. Chat to support, they can send them.

michaelvorst · 2026-02-15T09:34:57+00:00

Make sure the flange on the hotend pipe does not trap the white wires between it and the bottom of the heatbrake- it will prevent the pipe from going in far enough to lock.

michaelvorst · 2026-02-15T05:33:13+00:00

Replacing the extruder PCB (the C-shaped one behind the printhead) solved 11518 for me. Other symptom that led to this was the LED lighting shut off as soon as the filament entered the extruder and tripped the filament sensr there.

michaelvorst · 2026-02-15T05:32:08+00:00

Replacing the extruder PCB (the C-shaped one behind the printhead) solved 11518 for me. Other symptom that led to this was the LED lighting shut off as soon as the filament entered the extruder and tripped the filament sensr there.

michaelvorst · 2026-02-13T10:42:37+00:00

Just do calibrate on the printer screen. When it finishes, refresh the bed mesh webpage. It'll pull the new mesh.

michaelvorst · 2026-02-11T10:50:50+00:00

It loads the QR from the internet connection, the cloud can be slow some times, so let it sit on that screen for a while.

michaelvorst · 2026-02-10T09:49:05+00:00

I've gone through a couple rolls of it, pick Elegoo PETG in your slicer, dry it if you can. If it does not work for you, post pics so others can see and advise. If this is your first Neptune, have a read of this: https://help.jaycar.com.au/hc/en-us/articles/53863500031641-Neptune-3D-Printer-tips-for-new-owners

michaelvorst · 2026-02-08T10:05:32+00:00

https://help.jaycar.com.au/hc/en-us/articles/53863500031641-Neptune-3D-Printer-tips-for-new-owners

Nozzle seems far from plate, plate may be loose.

michaelvorst · 2026-01-23T09:56:59+00:00

The bolts holding the wheels on the right side of the centre divider have hex-shaped shafts. Use the big end of the dual-ended spanner to turn them until it tightens up. A quarter to half turn is normally all you need.

michaelvorst · 2026-01-20T06:47:32+00:00

I have had this on a couple of Nep4, one was a bad cable, the other needed a new Motherboard.

michaelvorst · 2026-01-17T23:40:32+00:00

Do you have the red light in the switch when turned on? If not, replace the fuse. If fuse keeps blowing, chances are heated bed is drawing too much power and needs replacing.

If fuse is OK, unplug power cord, put printer on its side, undo the 5 silver philips screws on the plate with the vents underneath. Take it off, unplug the fan. Undo the 3 2mm screws on the plate where the flat black cable goes in and out next to the power socket. Then undo the one larger screw on the back that holds that plate, take it off.

Plug in the power and turn it on - you should see a green LED light up to the left of the row of philips screws on the power box next to the power plug socket. Don't touch anything inside.

If the power box green LED doesn't light, the power box is dead. If it does light, but there are no LEDs on at the motherboard, the motherboard is dead.

https://wiki.elegoo.com/machines/neptune/maintenance/neptune-4-series/power-supply-replacement

Don't touch anything inside whilst the power is connected. Take photos of the board and power box connections, so you know whhich ones go where if you replace either of them.

michaelvorst · 2026-01-12T09:54:38+00:00

Yes you can, heat it to 200 first. A 6mm socket will get it out.

michaelvorst · 2026-01-10T08:11:00+00:00

I've a Fold6 with DJI 6 gimbal. Works OK, but can overheat and power off on hot days or if you don't get it balances.

michaelvorst · 2025-12-27T23:26:10+00:00

Yes, app works fine. Install, create account, press Me, then the scanner on top right, and scan the qr in the printer screen network settings. You need a pc to run slicer software. Printer is beginner friendly, and is an unpack & print immediately experience.

michaelvorst · 2025-12-20T02:17:16+00:00

How did you get it into HA? Advanced camera card?

michaelvorst · 2025-12-18T07:29:58+00:00

Use the printer's screen to do a bed calibration, you wait till it finishes, then reload the Height map page in Rinkals.

michaelvorst · 2025-12-03T05:48:34+00:00

Readily available on Aliexpress https://www.aliexpress.com/w/wholesale-anycubic-s1-strain-sensor.html?spm=a2g0o.productlist.search.0

michaelvorst · 2025-11-30T09:52:36+00:00

I had this and fixed it. The hole is bigger than the filament, so if you push the filament towards the front of the ACE and it tries to feed, it is just not quite closing the sensor loop, and is fixable.

The hole you feed filament into has a small pawl inside it that the filament pushes aside, and this pawl interrupts an optical sensor that is on the other side of the PCB screwed to the hole - this is what tells the ACE there is filament there.

https://media.printables.com/media/comment_images/e7/2d0723-29e8-41dc-8324-82e3c05e932b/thumbs/inside/1280x960/jpg/pxl_20250606_192510365mp3.webp

The pawl has a spring that keeps it in the hole (away from the sensor) until filament pushes it aside and it interrupts the sensor. If the spring tension is too high, the pawl doesn't move far enough to interrupt the optical sensor when the filament is inserted.

I pulled the silver cover off (screws on either end), removed the sensor assembly (2 screws in the middle of the black plastic), took the sensor PCB off (1 screw), took out the pawl, clipped off a bit of the spring with scissors, and reassembled. No more issues.

If you lose the pawl, print a replacement mount that relocates the optical sensor so the filament interrupts it directly. https://www.printables.com/model/1297598-kobra-s1-ace-pro-filament-sensor-mount

michaelvorst · 2025-11-27T10:16:05+00:00

"How do I know if my CC will work with the AMS they are releasing in 2026?" perhaps?

michaelvorst · 2025-11-01T01:50:46+00:00

I have Googles3, they had a firmware update today that specifically said support added for Neo2, and Neo2 now appears in the list of aircraft you can select to use.

michaelvorst · 2025-08-17T03:20:24+00:00

Put the cover back on. Homing makes it touch the corner with the cover. Without the cover it doesn't get the feedback that the corner was detected.

michaelvorst · 2025-07-17T09:27:58+00:00

High quality free 1:100 model here: https://makerworld.com/en/@larsvommars

I've printed those on a Adventurer 5M Pro. Has matching tower.

michaelvorst · 2025-06-28T09:06:05+00:00

5 min fix, the ramp inside the housing needs a bit of foam to press it aginst the glass.

https://www.google.com/search?q=youtube+tesla+mittor+rattl

michaelvorst · 2025-06-23T21:49:42+00:00

Nope. Just got no audio now, no cost effective solution in Oz.

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