Please add Support for I3 Mega-S Extruder about marlin-ai3m HOT 9 CLOSED

Got some info from someone with a Mega-S, I'll prepare a branch for it in the next few days.

When you mount your new extruder, start with M92 X80.00 Y80.00 Z400.00 E384.00 and save with M500. Those are the default values from Anycubic. I'd still recommend calibrating it after.

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Getting that extruder to work is probably just a matter of increasing E-steps via M92, I heard 400 is a good starting value to calibrate from there.

As to releasing a precompiled hex file, I'd want it to be close to the manufacturer values and since I don't know what else changed besides the E-steps, I'd need to get all the acceleration and jerk settings from the Mega-S firmware. If you are running it (1.2.0 from here), please send me the output of M503.

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thx, for your fast reply, i just ordered the Extruder upgrade kit.

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I own a mega-S, before checking this I just calibrated normally as per the Readme instructions.
Something I noted is that initially it extruded very little, like 20mm, after adjusting settings I restarted the calibration process to check it's correct, and it extruded about 93mm. I input the new value and started the process again to verify, and it extruded just ~20mm again.... so finally I went with this last result and didn't check it again, but found strange that the value swings back and forth.

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I suppose you used the same values again when following the extruder calibration instructions for a second time. Please note that at the second round of calibrating, you would need to replace the multiplier value (92.6) of the line

Calculate your new value: (100 mm / actually extruded filament) * 92.6

with your new value you got before. I should have mentioned that, will adjust it in a minute.

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Here is the result of the M503 command with stock firmware:

Connecting...
start
Printer is now online.
echo:V1.1.2
 1.1.0-RC8
echo: Last Updated: 2016-12-06 12:00 | Author: (Jolly, xxxxxxxx.CO.)
Compiled: Jun 25 2018
echo: Free Memory: 3109  PlannerBufferBytes: 1168
echo:V27 stored settings retrieved (398 bytes)
echo:Steps per unit:
echo:  M92 X80.00 Y80.00 Z400.00 E384.00
echo:Maximum feedrates (mm/s):
echo:  M203 X500.00 Y500.00 Z6.00 E60.00
echo:Maximum Acceleration (mm/s2):
echo:  M201 X3000 Y2000 Z60 E10000
echo:Accelerations: P=printing, R=retract and T=travel
echo:  M204 P3000.00 R3000.00 T3000.00
echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s),  Z=maximum Z jerk (mm/s),  E=maximum E jerk (mm/s)
echo:  M205 S0.00 T0.00 B20000 X10.00 Y10.00 Z0.40 E5.00
echo:Home offset (mm)
echo:  M206 X0.00 Y0.00 Z0.00
echo:Z2 Endstop adjustment (mm):
echo:  M666 Z0.00
echo:Material heatup parameters:
echo:  M145 S0 H180 B70 F0
  M145 S1 H240 B110 F0
echo:PID settings:
echo:  M301 P16.43 I1.04 D61.37
echo:Filament settings: Disabled
echo:  M200 D1.75
echo:  M200 D0
echo:SD init fail
>>> M503
SENDING:M503
echo:Steps per unit:
echo:  M92 X80.00 Y80.00 Z400.00 E384.00
echo:Maximum feedrates (mm/s):
echo:  M203 X500.00 Y500.00 Z6.00 E60.00
echo:Maximum Acceleration (mm/s2):
echo:  M201 X3000 Y2000 Z60 E10000
echo:Accelerations: P=printing, R=retract and T=travel
echo:  M204 P3000.00 R3000.00 T3000.00
echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s),  Z=maximum Z jerk (mm/s),  E=maximum E jerk (mm/s)
echo:  M205 S0.00 T0.00 B20000 X10.00 Y10.00 Z0.40 E5.00
echo:Home offset (mm)
echo:  M206 X0.00 Y0.00 Z0.00
echo:Z2 Endstop adjustment (mm):
echo:  M666 Z0.00
echo:Material heatup parameters:
echo:  M145 S0 H180 B70 F0
  M145 S1 H240 B110 F0
echo:PID settings:
echo:  M301 P16.43 I1.04 D61.37
echo:Filament settings: Disabled
echo:  M200 D1.75
echo:  M200 D0
Disconnected.

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Done, added a custom branch for the Mega-S. Will add compiled binaries on the next release for the i3.

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@davidramiro Has Mega S compatible compiled binaries ever published ? If yes.

Can somebody point me out to them ?

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I did at some point before, but as we have 3 different binaries, adding Mega-S binaries would result in 6 different binaries which is a bit much in my opinion since the Mega-S only requires a few G-Code commands to be correctly set up.

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