5.1.1 Creator 3 Pro can't control cooling fans

[S3D-Jason]

Are you already using the profile available in S3D by going to Help > Configuration Assistant? That should resolve many of these issues.

[Marc_Nijdam]

No, I am not using the assistant.

It wouldn't help though, since the Firmware contains a bug. After reverse engineering it, the M106 and M107 commands, just do not handle the Index parameter as it is defined here: https://marlinfw.org/docs/gcode/M106.html

In a large switch-case statement in assembly, where each M command is filtered out, some commands are handled with functions which expect 3 arguments and some expect 2. For the M106 and M107 it should be 3 but the firmware wrongly takes 2.

Apart from the character confusion (Flashforge expects T as index rather than P), when using the T with the original firmware, will therefore not help.

Last week I contacted Flashforge in China to inform them about the issue. I hope they will provide an official fix.

[S3D-Jason]

You could try adding the following commands to your post processing script:

{DELETE " P0"}
{DELETE " P1"}

That will remove the extra P-parameters if the firmware isn't handling them properly.

[Marc_Nijdam]

Hi S3D-Jason, as I am unable to edit my postings, could you please delete the following postings, including this one:

viewtopic.php?p=73550&sid=2949a004b473b ... 285#p73550

viewtopic.php?p=73569#p73569

viewtopic.php?p=74047#p74047

viewtopic.php?p=74053#p74053

The reason is that my first posting is wrong and will likely confuse other users.

Both the left and the right cooling fans are able to spin when printing via the internal memory. The only case when the left cooling fan does not spin is when using the machine control application. But since the usage of that feature is very insignificant to most users, I kindly ask to delete all these postings. Can you please do that? Many thanks in advance.

[S3D-Jason]

It seems like the posts still have useful information. For example, if users need to get rid of the P0/P1 part of the M106 fan speed commands, it explains how to do it.

Were you ever able to get both fans working as you wanted?