How do you control fans in Slicer, and bed adhesion problems

[Cyber_Gram]

Hello, I am new to the Makergear M2 and 3D printing in general. I am wondering how to control the Makergear M2's fans using Slicer.
My beggining/ending gCode scripts look like this currently:
Beggining:

Code: Select all

M84 S0 ; disables bed timeout
M108 S255 ; turn on M2 fans
G28 ; home all axes
G1 Y50 Z0.3 F9600 ; move forward to avoid binder clips
G1 X205 Z10 ; move off platform
G1 Z0.4 ; position nozzle
G92 E0 ; zero extruder

End:

Code: Select all

M104 S0 ; turn off temperature
G28 X0  ; home X axis
M84     ; disable motors

Only the smaller fan is on, and I am wondering how to control the larger fan.

Also, I am having bed adhesion problems. I have the bed temp set to 70 C (It is working, by the way), and the print is peeling on the edges. (I am using PLA, by the way)
The print sometimes even gets knocked off the bed (For lack of better term), turning the print into a mess of plastic.
I tried printing something 3 times and each time it got knocked off the bed. This may be caused by an non-level bed, though, and the nozzle may be hitting the print.

Anyways, thanks for the help so far!

[jsc]

Check out the M2 tips thread in the tips forum for a bunch of new user info.

The bed fan will be controlled by the slicer, look through the slicer profile for cooling settings. Generally you want to have it turn on 100% after the 2nd layer for PLA, off otherwise.

For bed adhesion, make sure your bed is level and set to the correct height (see the tips thread for more info). Then you want to use hair spray or (I recommend) gluestick.

[insta]

70C is too hot for PLA, it'll actually heat & soften the plastic and cause it to curl. Try 57-60C with hairspray or diluted Elmer's glue for a bed surface. Make sure your first layer is good, and the bed is level -- there are many threads (usually posted by Jules) about how to do it.

M106 is the command that turns on the fan, but slic3r will generate those commands for you.

pla settings.png (30.09 KiB) Viewed 7456 times

[Cyber_Gram]

Thanks for the replies! I am using a glue stick and it helps with bed adhesion a lot. I think my bed may be un-level, too, so I will look into that.