Extruder leaves bed

[frank2]

Hi everyone,

For some reason, my extruder decides to leave the bed (in terms of the xy plane) at the beginning of a print (after going to the origin), push out a little bit of filament while floating off the bed, and then come back to begin the actual print. The interesting part is that if you run the g-code for the item I'm trying to print, the simulation shows that the extruder will in fact leave the bed, and I can't figure out why.

G-code is attached. I made the model in Inventor Professional 2013, saved as .stl, then imported to Simplify 3D 2.0.1 and generated the g-code. The printer is a MakerGear M2. This has never happened before I updated Simplify 3D (I was on a relatively old version).

I would greatly appreciate any help.

[jimc]

I have been using the software for 6 mos now, ver 1.1.5 and creator has always done this. This is the purge cycle and its supposed to do it. Its in your startup gcode in the scripts section. You always want to run the purge cycle.

[Karl_Williams]

I prefer to purge the extruder manually before starting a print so I only have 2 lines in my starting g-code script:

M108 S155 ; turn on M2 fans
G28 ; home all axes

[dalew8abz]

frank2,

Some of us using early versions of Creator played around with Starting G-Code (in the FFF window, with Advanced shown, on the Scripts tab) to add a wipe function similar to the one used by MakerGear in building the sample files for the hex twist, bracelet, etc.

Perhaps S3D incorporated it in their default M2 profile, because a bunch of us were doing this sort of thing.

I dinked around with the starting G-code quite a bit and came up with this:

G28 ; home
G1 F10800 ; set high speed
G1 Y18 ; move to clear binder clip
G1 X205 ; move off right side
G92 E0 ; extruder to relative zero
G1 F300 ; set speed
G1 E40 ; extrude to clear nozzle
G92 E0 ; extruder to relative zero
G1 F10800 ; fast speed
G1 X0 ; wipe

(This particular snippet extrudes a ridiculous amount of filament -- 40 mm -- to prime the nozzle because I was using it with some really "drooly" filament.)

Anyway, go to your process, show the advanced settings, go to the Scripts tab and see what's there for the starting G-code. Edit to make it do (or not do) what you want.
Dale

[frank2]

Ah, thanks very much for your help, guys. Like karl_williams, I prefer to manually purge the extruder, so I'll get to changing the settings. And thanks, Dale, that makes sense.