priming extruder issue

[HauntedMaestro]

I'm using simplify3D with a Lulzbot TAZ 5. Everything works splendidly except for one issue.

When starting a print, it doesn't prime the extruder before printing, which results in the first couple of seconds not outputting filament.
Has anyone else had this problem, and if so, what was your remedy.

Much thanks
Shaun

[CompoundCarl]

Use a skirt. That's exactly what it is intended for.

Alternatively, you can write whatever starting script you want and the software will run it at the beginning of each print. It's up to you.

[LazyWolfe]

I am having a similar problem, but perhaps more puzzling. When I attempt to print, the head moves to the front right corner of the bed, then extrudes a bit of filament, then begins to move the print head as if printing the item. But it does not extrude anything. I went back to some test prints that came with my Flashforge Creator Pro. I sliced using the RelicatorG that came with the printer, and they print just fine. I went back to some things I had sliced/printed using S3D, they failed. I just now downloaded a new thing from Thingiverse, sliced it using the default Process1, watched the preview and it looked ok, but the print failed.

I also use the load filament utility in my printer to verify that ABS does extrude as expected, and let it run for several minutes. Prints still fail because no filament is extruded after the initial spritz at the corner of the plate.

Help!
thanks
russ wolfe

[CompoundCarl]

Well that's definitely a different topic, so you really should create a new thread to discuss it...

But my guess would be that your nozzle is too close to the bed, which is why it doesn't extrude. You can read more ideas here: https://www.simplify3d.com/support/prin ... t-of-print

[LazyWolfe]

My problem appears to be someplace in the printer settings. I tried may things, but the result was always the same, If I sliced using S3D, the printer would extrude a little at the right front edge of the plate. Then turn off the extruder and just go through the motions. If I sliced the same print with the Rep/skeinforge that came with the printer, it would print. Finally, I restored the default settings for my Flashforge Creator Pro. and behold! builds are being completed!

So the question is what printer setting(s) cause the extruder to shut off?

tnx
russ wolfe

p.s. If this stuff belongs in its own thread, perhaps the moderator could move it? Or tell me how?
tnx

[CompoundCarl]

You click the "Post a new topic" button. Not sure what other instructions are needed...

[Konky]

Process settings -> Scripts -> Launch script
Search for something like
"G1 E26 F60 ; purge nozzle slowly"
It might be different for you but it will be a "G E F" line in the beginning of your script
Replace it with something like this:
G1 E40 F60 ; purge nozzle slowly (longer)

Solved it for me.

[James ORD]

This could be an issue with a setting mismatch in regard to 'relative extrusion distance' vs 'absolute extrusion distances'.