Benchy: Is this a Slic3r problem?
- Matt_Sharkey
- Posts: 347
- Joined: Mon Oct 20, 2014 3:10 pm
Benchy: Is this a Slic3r problem?
So I got some new filament for a new project, Hatchbox PLA gray. I can't make odds of this defect on this Benchy and I think it's an inherent issue with Slic3r.
The artifact is a bulge noticeable on the bow 1cm from the bottom. I want to think that it is an issue with gap fill, but the area in question is mostly honeycomb. I have calibrated for z height, multiplier, temp, and retraction (in that order). relevent settings:
Diameter: 1.73mm
Multi: 0.99
Z offset: -0.28mm
Temp: 210-206
Bed: 60-60
Retraction 2.0mm @ 60mm/s
Z-hop: 0.1mm
height: 0.2mm
Width: 0.4mm
Perimeters: 3
Perimeter Speed: 80mm/s
Infill: 15% honey
overlap: 8%
Infill speed: 120mm/s
Accel: 800mm/s^2
Jerk: 10mm/s
Could anyone offer some advice perhaps? I will admit, I am a bit rusty and I lost most of my settings about 6 months ago, so I am re-configuring a lot here. What would be fantastic is if someone could run off a GCODE from S3D (with my calibration settings) of a Benchy so I could maybe commit to buying S3D.
Benchy: http://www.thingiverse.com/thing:763622
My Gcode of this print:
The artifact is a bulge noticeable on the bow 1cm from the bottom. I want to think that it is an issue with gap fill, but the area in question is mostly honeycomb. I have calibrated for z height, multiplier, temp, and retraction (in that order). relevent settings:
Diameter: 1.73mm
Multi: 0.99
Z offset: -0.28mm
Temp: 210-206
Bed: 60-60
Retraction 2.0mm @ 60mm/s
Z-hop: 0.1mm
height: 0.2mm
Width: 0.4mm
Perimeters: 3
Perimeter Speed: 80mm/s
Infill: 15% honey
overlap: 8%
Infill speed: 120mm/s
Accel: 800mm/s^2
Jerk: 10mm/s
Could anyone offer some advice perhaps? I will admit, I am a bit rusty and I lost most of my settings about 6 months ago, so I am re-configuring a lot here. What would be fantastic is if someone could run off a GCODE from S3D (with my calibration settings) of a Benchy so I could maybe commit to buying S3D.
Benchy: http://www.thingiverse.com/thing:763622
My Gcode of this print:
Re: Benchy: Is this a Slic3r problem?
Too hot maybe? Looks a little melty to me....some of those PLA filaments will melt at absolutely nothing. (Also might want to increase the infill % and lower the infill speed.)
But get S3D anyway...it's so worth it.
But get S3D anyway...it's so worth it.
Re: Benchy: Is this a Slic3r problem?
Doesn't show up on my Benchy, so it's most likely an issue with one of Slic3r's bazillion options.Matt_Sharkey wrote:it's an inherent issue with Slic3r
That bar (looks like) it appears where the sloped front deck joins the flat(-ish) main deck. Step through the tool path preview and I think you'll find a bunch of solid plastic instead of the usual infill pattern.
Take a look at [Print Settings] → Infill → Advanced: Solid Infill Threshold Area. It's probably set to some absurdly large value: back it down to, say, 4 mm², re-slice, and look at the preview again. That should reduce the tendency to overload small areas with plastic; the change from normal infill to a solid slab generally produces a visible artifact on the perimeter.
- Matt_Sharkey
- Posts: 347
- Joined: Mon Oct 20, 2014 3:10 pm
Re: Benchy: Is this a Slic3r problem?
I agree with the melty look, but I think my phone embellishes this look. I did a temperature tower and found that the layers delaminated at 200C but at 205 they broke perpendicular to layers, so I chose 205 and bumped it a touch.Jules wrote:Too hot maybe? Looks a little melty to me....some of those PLA filaments will melt at absolutely nothing. (Also might want to increase the infill % and lower the infill speed.)
But get S3D anyway...it's so worth it.
will look into the infill settings.
Yeah threshold was at 70mm^2 so i pulled that down. off the bat I didn't notice dramatic changes in the Slic3r rendered tool-path but it may have subtly changed something else. I believe the solid slab mode you speak of is gap fill? and I also believe it is a known issue with more recent versions of slic3r that it over-stuffs these areas causing surface artifacts.ednisley wrote:Doesn't show up on my Benchy, so it's most likely an issue with one of Slic3r's bazillion options.Matt_Sharkey wrote:it's an inherent issue with Slic3r
That bar (looks like) it appears where the sloped front deck joins the flat(-ish) main deck. Step through the tool path preview and I think you'll find a bunch of solid plastic instead of the usual infill pattern.
Take a look at [Print Settings] → Infill → Advanced: Solid Infill Threshold Area. It's probably set to some absurdly large value: back it down to, say, 4 mm², re-slice, and look at the preview again. That should reduce the tendency to overload small areas with plastic; the change from normal infill to a solid slab generally produces a visible artifact on the perimeter.
- Matt_Sharkey
- Posts: 347
- Joined: Mon Oct 20, 2014 3:10 pm
Re: Benchy: Is this a Slic3r problem?
there is still a slight bulge that starts a few layers lower, right when the railing is started. maybe ringing? maybe the same gap fill issue?
next print is seeing if I can lower the temp to 200 and get a sturdy piece. low temp issues are exposed on single wall calibration cubes, but I'm curious if low temps are more acceptable when printing 3 shells, lets find out!
- Matt_Sharkey
- Posts: 347
- Joined: Mon Oct 20, 2014 3:10 pm
Re: Benchy: Is this a S̶l̶i̶c̶3̶r̶ S3D problem?
Okay, I caved. I bought S3D a few days ago. Still trying to get this dialed in before the big project, I don't want any failures.
I'm having a hard time balancing the extrusion multi. In Slic3r I found the multi to be 0.99. I applied this to S3D and got a good benchy, but a bit over stuffed. so I calibrated and found it was overextruding. So I found S3D's multi to be 0.92.
Now is the frustrating part. I need a multi of 0.92 to get my 0.4mm single wall cube as desired. but then when I print anything with solid infill, it's too anemic and need more multi! WHATS GOING ON?!?!?
I really want to like S3D because it's solving all of the problems that Slic3r was giving me and only returned with a few of its own.
Halp!
I'm having a hard time balancing the extrusion multi. In Slic3r I found the multi to be 0.99. I applied this to S3D and got a good benchy, but a bit over stuffed. so I calibrated and found it was overextruding. So I found S3D's multi to be 0.92.
Now is the frustrating part. I need a multi of 0.92 to get my 0.4mm single wall cube as desired. but then when I print anything with solid infill, it's too anemic and need more multi! WHATS GOING ON?!?!?
I really want to like S3D because it's solving all of the problems that Slic3r was giving me and only returned with a few of its own.
Halp!
Re: Benchy: Is this a Slic3r problem?
If I want a solid part in S3D, I set the bottom layers to 9999. Works better than 100% infill.
- Matt_Sharkey
- Posts: 347
- Joined: Mon Oct 20, 2014 3:10 pm
Re: Benchy: Is this a Slic3r problem?
I was referring to top and bottom layers which are solid, I still use infill, but I care less about infill quality...
0.92 multi on left
0.99 multi on right
0.92 multi on left
0.99 multi on right
Re: Benchy: Is this a Slic3r problem?
Look at the Outline Overlap setting on the Infill tab. I think default is 10%. Might want to try increasing that.