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2

Okay, to anyone who is looking at this post, I am an idiot. I have spent the last 4 or more hours sifting through youtube videos and forum posts to figure out this problem. I have reinstalled firmware modifications dozens of times. All of this, to just now discover that I never had the bed or hotend cables connected. That's right, I never even considered the ...


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If all cabling is correct, you have most likely chosen the wrong thermosensor type. You need to put the correct temperature table for your thermosensor into your Firmware. As explained here, you need to set the number at the end of these lines to match what you have installed. The "standard" CR-10 should use the Sensor type 1: 100k/4.7 k EPCOS. * :{...


1

One way to have two E-steppers to do the same work should be to enable MIXING_EXTRUDER in Configuration.h. I have no experience in this myself, but it is a good starting point. A second way is to actually connect the two identical steppers in parallel. That trick is sometimes used for Z-steppers. I don't expect the current consumption to be an issue. This ...


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Is it something like in this video? Extending/retracting when NOT probing works fine, but probing fails with the pin not correctly retracting? Then the BLtouch is defective and it should be replaced. It is not a firmware issue.


1

I had the same problem. It seems it was definitely a loose connection on the BLTouch. I put a wire tie around the neck of the BLTouch, just underneath the mounting feet, to secure the wire and ensure a good connection regardless of position. It has worked great so far.


1

There is a problem in the Megatronics default config file. I used an other default config file and it worked!


3

In your case, since linear advance makes the issue disappear, the reason of the thinner lines is the same as explained in the link you provided: The section (2) simply is very long because you probably have a Bowden setup which takes more than the length of the middle section to recover. However it does recover, see the first line (k=0) in the first image. ...


1

The setting that makes these small retractions is LIN_ADVANCE. It is found in Configuration_adv.h and is disabled in the vanilla configuration. I, on the other hand, is using one of the 46 example configurations that has this feature enabled. It shall be said that most of them them has the value 0 set to this, which means that it has no effect. To disable ...


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A second G28 should not be necessary as it can be replaced by a G0 or G1 command, but in the end it should work when RESTORE_LEVELING_AFTER_G28 has been set in firmware weren't it for a bug present in the Marlin 2.0.7.2 and 2.0.x bug-fix release.


2

The Ender 3 has a printable area of 220x220x250 mm according to the specifications. So, there is nothing wrong. Sometimes heated beds are slightly larger than the actual print area. E.g. 235x235 mm or 310x310 mm. For centering the nozzle to the build plate, you should look into "How to center my prints on the build platform? (Re-calibrate homing offset)&...


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The correct Marlin-command to unpause seems to be setUserConfirmed(). I have tested that it works.


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By avoiding pin 3 entirely, the Z-axis steppers have started to move correctly. My bed heater went out a while ago, so I redefined the connections in Marlin to use that pin (pin 12) as the Z-step pin, connecting it to the A4988 accordingly. This has caused no issues other than small noise problems so far. Unfortunately, I can't speak to any potential issues ...


1

I've replaced the Z-axis stepper driver with an off-board Pololu-style A4988 driver by soldering leads to pins 2 and 3 on the Melzi board, then connecting those to the driver on a separate board. The Z-axis now moves correctly. When I encountered issues with the step pin (pin 3), I connected it to pin 12 (bed heater) instead, leaving the bed to be heated ...


3

There are three things to fix and one suggestion: Change follwing lines of M109, using parameter R instead of S, because the latter is not waiting to cool down: M109 R160 ; Wait for 160C ... M109 R110 ; Heat hotend to 110C The behavior of M420 will depend on type of bed leveling, saved mesh, etc. It is off topic to troubleshoot this. The printer operates ...


1

Extruder stops to spin The problem you described seem to be reported elsewhere for TMC in relation to stealthChop mode (unsure, see below) and linear advance. For details look at this comment in Extruder stops during print (Bugfix-2.0.x) #17944. An advice from there is to supplement the G-code with (my interpretation): M569 S0 E ; disable stealthChop for ...


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