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General information collated into the most often asked questions and answers.
NOT an official Anycubic-operated forum; just customers discussing their machines.

View Comment

Y Axis layer shifting problem.

by AirwavesTed

Hi all.

Does anyone else have or had a problem with layer shifting on the Y axis?

I've had my i3, first printer, for just over a month now and was fault free for the first couple of weeks and produced very good prints but then the layer shifting issue started and it steadily got worse.
This shifting happens when short repetitive rapid travel movement were required, as in when printing infill and will happen ever time when trying to print this Knurling bolt and nut https://www.thingiverse.com/thing:1460364

Started out checking for any mechanical binding and found nothing, in fact with the belt off the motor the bed will slide through it travel range very easily just by tilting the printer.

Then tried the settings option by reducing the print and travel speeds but that didn't help so then tried the following:

Checked the stepper driver module vref. All were set to the max 0.9v = no change
Switched the X and Y stepper driver modules = no change
Swapped out the Y stepper motor = no change
Fitted new stepper driver module = no change
Adjusted the stepper driver module vref voltage throughout its 0.8-0.9v range = no change
Re flashed the firmware = no change
Reduced the standard Max Acceleration from 2000mm/s to 500mm/s through MatterControl = no change
Fitted a higher torque stepper motor, 0.59Nm instead of 0.40Nm and you guessed it! = no change

The best way I can described it as though the print bed is to heavy with to much inertia for the Y axis stepper motor to cope with when short repetitive rapid travel movement were required.

Anyone spot something I've missed? Or had a similar issue?

Thanks for your time guys.

Knurling bolt and nut
View Comment

broken extruder bearing part name or specs

by brunoosti

What is the extruder bearings name (or specs) so as I can ask/search for the right part?

View Comment

Anycubic i3 Mega s - marlin upgraded problem with hot end

by quid_non

Been running this printer with the recent marlin firmware and ocotprint = all was good. Decided to upgrade the bowden tube to Capicorn SE series and replace the hotend fan with the noctura upgrade. Short of it after replacing the tubing and fan the hot end is slow to get to temp (200 C) and sends an error message that the "firmware reported an error - Heating failed" see attached file for a copy of the message. Multiple reboots of the printer results in the same problem. Any suggestions to fix?

View Comment

PLA - I’m doing something wrong?

by Milql


I’m printing flat plate and normally I would expect to see lines of material from layer on the top, but in my case I can see also later under. On the end I’m getting strange looking pattern.
I’m using i3 Mega s with newest original firmware and replaced drivers to TC2209. Slicing I’m doing in Cura.

I don’t know it this should look like this or I have some hardware issues or wrong settings.

Please help to understand if this is correct by checking files from the attachment.

View Comment

Hotend only heats up to 135ºC-140ºC

by lurosset

Something is going on with my printer's hotend.

I just finished changing my i3 Mega's PTFE tube and brass nozzle, reassembled it, always taking care not to damage the heating element wires.
Then I check the temp and it was cooling down, despite the set temperature being high (210º). I turned it off, let it cool down and turned it back on. I set it again to 210ºC and it only reaches about 135ºC-140ºC, not going over it.
So I change the heating element and thermistor for fresh new ones and the same behavior takes place: not heating up beyond 140ºC.

Any ideas on why this is happening or how to fix it? I checked the connectors and they all seem to be fine. Cooling fans run normally as well.

heater hotend
View Comment

Anycubic I3 Mega S Stringing problem

by Inapinchpictures

I am trying to get better stringing results, but im out of options / ideas. Any suggestions welcome :-) (or maybe im simply at the limit for this printer?)

Model: Anycubic I3 Mega S (2019)
Modifications: TMC2209 (tried to revert to stock driver for extruder), Mosfets for heaters, some small stuff which should have no impact on this...
Marlin (https://www.thingiverse.com/thing:4358979/comments Bavarian-Chris)

Slicer: Cura 4.7.1 - printing with Octoprint

Material: PLA (X-Filament & Anycubic Filament)

Settings: tried everything. reduced Jerk settings, acceleration control, variation of retraction speed and length between 3mm 25mm/s and 7mm 80mm/s -> i have 100s of test towers now :-) changed stepper driver, installed new nozzle, new hotend. checked if the ptfe moves -> no
Extruder steps calibrated. Hotend PID tuned. Z-axis aligned. played with stepper driver voltages.

Voltage settings for drivers now:
X,Y,Z: 1V
E0: 0.95V (tried 0.8V which was stock value)

Best i could get in the picture attached printing this test: https://www.thingiverse.com/thing:909901

Cura Settings:
Layer height: 0.2
Temp: 200 (had the best results from temp tower)
Fan Speed: 75%
Print Speed: 50mm/s
Travel Speed: 100 mm/
Retraction distance: 4 mm
Retraction speed: 45 mm/s
Coasting enabled

Printer Settings

Send: M503
Recv: echo: G21 ; Units in mm (mm)
Recv: echo:; Filament settings: Disabled
Recv: echo: M200 S0 D1.75
Recv: echo:; Steps per unit:
Recv: echo: M92 X80.00 Y80.00 Z400.00 E392.00
Recv: echo:; Maximum feedrates (units/s):
Recv: echo: M203 X500.00 Y500.00 Z6.00 E60.00
Recv: echo:; Maximum Acceleration (units/s2):
Recv: echo: M201 X2000.00 Y2000.00 Z60.00 E10000.00
Recv: echo:; Acceleration (units/s2): P R T
Recv: echo: M204 P4000.00 R3000.00 T4000.00
Recv: echo:; Advanced: B S T J
Recv: echo: M205 B50000.00 S0.00 T0.00 J0.01
Recv: echo:; Home offset:
Recv: echo: M206 X0.00 Y0.00 Z0.00
Recv: echo:; Mesh Bed Leveling:
Recv: echo: M420 S0 Z0.00
Recv: echo:; Endstop adjustment:
Recv: echo: M666 Z0.00
Recv: echo:; PID settings:
Recv: echo: M301 P16.86 I1.27 D55.94
Recv: echo: M304 P121.66 I22.85 D431.88
Recv: echo:; Linear Advance:
Recv: echo: M900 K0.00
Recv: echo:; Filament load/unload lengths:
Recv: echo: M603 L538.00 U555.00
Recv: echo:; Filament runout sensor:
Recv: echo: M412 S1
Recv: ok

Anycubic Marlin 2 (i3 Mega or i3 Mega S) Marlin Custom Firmware mesh Leveling & BL Touch
Retraction test
Anycubic_I3_Mega stringing_problems stringing_test
View Comment

Anycubic I3 Mega (version 3) Laser Module HELP

by MGMGtech

Hello all.

Ive had my mega for a while now. Done some typical upgrades and about 6 months ago I added a 2500mw 405nm laser module to my mega.
It worked great for a while but wasn't quite "cutting" it and so I purchased a 6000mw 405nm laser to replace it.
I was using the hot end fan pin to run the TTL/PWM power control of the 2500mw laser. However upon researching the new more powerful laser its come to my attention that I will need more amperage than the fan pin can provide.
I've seen suggestions of using the m3/m5 pins of which I haven't the foggiest idea of what to do in that regard and google didn't turn up much in relation to the Mega.
Another suggestion was to use the hot end heater pins. This seems like a more viable option however, from what i can gather that pin isn't running a PWM and i do not know how id set its power level via the gcode other than straight on or off, i believe its M103 ? I understand that there is a command to enable PWM on pins but the information regarding this is relatively slim from what I have been able to find.

Id greatly appreciate anyone who would be able to further explain either of the above choices if they are viable options. Id hate to have wasted a few hundred dollars for nothing!

Thanks again!

View Comment

PETG settings

by Tinman1

Just got my Mega the other day and have successfully printed several items using PLA.

Ordered some PETG and was hoping for advise on how to use. It looks like a great material.


View Comment

Cura Profile for 4.3.0

by sciman3232

I am looking for a cura profile for the anycubic i3 mega and i cant find one. is there anyone who has one and can help me?

View Comment