Creating a GPIO Macro to run a DC Motor

[madeinta1wan]

Re: Creating a timed fan Marco and Meta

Hi,

Following on this topic, I've got a similar large format Cartesian printer with a 6HC main board and 3HC expansion boards which I've equipped with a small (M5Stack) dc motor to periodically vibrate for a second to make sure pellets are not binding in the feed passage.

I've got the DC motor connected to the IO_1 of my 3rd 3HC and it runs (constantly, I know this is on 100%, this is just for testing) with this in my config.g -

; Pellet Shaker
M950 P1 C"3.io1.out"  Q450       ; create output/servo 
M42 P1 S1 ; set 100% PWM on GPIO port 1
 

What I thought I could do is modify the code that @infiniteloop and @OwenD helped @kmoore for his pellet feed-

; filamentmonitor.g
; Check filament progress, feed pellets if needed
if job.file.fileName == null 
    M99 
if {{global.filamentProgress + 11500.0} <= move.extruders[0].position} ;
    set global.filamentProgress =   {move.extruders[0].position + 11500.0} 
    M106 P0 S255 
    G4 S3 
    M106 P0 S0

But in my case, I'd like to switch on a fan connection on the 6HC using the M106 command and pulse the pellets a bit.

Is there a way of adding control over the DC motor connected to the IO_1 pins within that macro?

Thanks very much, Nate

[OwenD]

@madeinta1wan

You need to use M42
https://docs.duet3d.com/User_manual/Reference/Gcodes#m42-switch-io-pin

[madeinta1wan]

@OwenD Thanks, that can be run like the M106 command in the macro?

[OwenD]

@madeinta1wan said in Creating a GPIO Macro to run a DC Motor:

@OwenD Thanks, that can be run like the M106 command in the macro?

Yes

if {{global.filamentProgress + 11500.0} <= move.extruders[0].position} ;
    set global.filamentProgress =   {move.extruders[0].position + 11500.0} 
    M106 P0 S255 
    M42 P1 S1
    G4 S3 
    M106 P0 S0
    M42 P1 S0

[madeinta1wan]

@OwenD Amazing thanks very much