GCODE Question - Starting fan  

RE: GCODE Question - Starting fan

AFAIK Chuck you are only able to turn the fan on at layer 10 in the GCODE file with M106, then switch it off with M107.

Can set the speed, etc but C++ commands are intended only for the Firmware, sure the printers are only able to interpret marlin GCODE commands as per the following format.  Set Fan Speed | Marlin Firmware (marlinfw.org)

I could be wrong, it has been known before 🙂

RE: GCODE Question - Starting fan

That command (followed by {endif}) will insert M106 at layer 10. That will stay in effect until changed. Hard to say when it might be changed though, esp. with variable cooling in the slicer.

So you want cooling fan off above layer 10?

RE: GCODE Question - Starting fan

Hmmm, so you can custom code C++ into a GCODE file.

Interesting, well I'll be a monkeys uncle

Thought Bobstro would know the answer, clever lad 😉

RE: GCODE Question - Starting fan

It's very limited, but yes. Some notes and links here.

RE: GCODE Question - Starting fan

@bobstro

No.  Not layer 10.  I was using this as an example.  I am print nose cones with ABS.  The tip is always messed up.  I found that if I manually turn the fan on for the last 10 layers that it prints perfectly.  I just need to insert that in the Gcode.  I need to figure that out by determining the number of layers.  

RE: GCODE Question - Starting fan

I found the easiest way to do this was use the minimum layer time cooling settings. Observe the layer times as your print heard the tip, and have it kick cooling on for the quick layers. I've got some notes on doing this in my PPE printing notes. It's a manual process unfortunately. If most of your cones are similar, you should be able to find a good range.

RE: GCODE Question - Starting fan

"nears the tip". Stupid short edit window.

RE: GCODE Question - Starting fan

@bobstro

That is perfect.  I will try that.  It is much easier than GCODE.