My little “saw tooth” problem.

[Stephen6309]

@martin1454 Unless they're using firmware retraction (G10/G11), then it is a M207 setting in config.g.

[Martin1454]

@stephen6309 said in My little “saw tooth” problem.:

@martin1454 Unless they're using firmware retraction (G10/G11), then it is a M207 setting in config.g.

Well, S3D does not support it "natively" - You can do it, but it is a bit tricky.

[gavatron3000]

@steve-lynch said in My little “saw tooth” problem.:

I do see that the saw tooth (Bulge) is happening where the perimeter stops. when it finishes the outside pass, it leaves a little blob. The reason it's in all 4 corners, is because simplify 3d was staggering the seams. they all end up in the same place if I align the seams.

I'm reading and reading up on retraction, but I am not finding anything that really pertains to the duet. Is retraction in the slicer, or in the firmware?

I see no retraction settings in my config.G

is anyone familiar with A Duet / BMG / E3Dv6 / Simplify 3d setup that could explain where I might look to adjust retraction?

Thanks!

I have the same combo on my printer, direct drive. My retraction settings in s3d are 1.1mm at 50mm per sec 3mm wipe and no coast. Works well

[Dougal1957]

@martin1454 S3D does support firmware retraction natively although it uses different Codes for it but RRF was altered to accept them some time ago.

Doug

it is the include M101/M102/M103 commands setting

[Martin1454]

@dougal1957 said in My little “saw tooth” problem.:

@martin1454 S3D does support firmware retraction natively although it uses different Codes for it but RRF was altered to accept them some time ago.

Doug

it is the include M101/M102/M103 commands setting

Also remember to dissable "Retraction" on the extruder tab

[dc42]

The M101/102/103 commands don't do a perfect job. I forget the details, but there is some situation in which the commands are not correct for controlling firmware retraction.

[Dougal1957]

@dc42 Ah OK David I wasn't aware of that as I don't use S3D anymore so won't have run into that issue

[Steve Lynch]

@DC42 I have all but eliminated my problem from what I can see. However, I'm concerned about how I did it. I have tried every combination of speed, accel, Jerk, extrusion multiplier, retraction, etc.... What seemt to have killed the problem was Pressure advance.

Here's My concern though. I have pressure advance set to 0.14 that seems an awful way off from .05. Is this a problem? My prints look amazing, I have no artifacts, no under extrusion, and almost no blobbing in the corners now.. I can't feel them, but if I hold it in the light, I can see a slight change in the reflected light. (if you know what I mean) Non squares are looking perfect! I printed a carbon fiber bust of a naked woman, and it looks super for the settings I used (a little better quality than fast in Simplify 3d)

so, Am I covering up a bigger problem, or is this what Pressure advance is there for?

Thanks!

Steve

[Phaedrux]

@steve-lynch I think that if your prints are looking good you must be doing something right.

[dc42]

If pressure advance of 0.14 works well for you, stick with it!

The required pressure advance depends mainly on the length of the Bowden tube between extruder and hot end (longer = more PA), and on how sloppy the fit of the filament in the Bowden tube is (more sloppy = more PA). But it also depends on other factors such as motor current and gearing (low motor current needs more pressure advance, so does low extruder steps/mm). The suggestion of 0.05 sec pressure advance for non-Bowden extruders is just a starting point.