1 Topic by Lindharin

  • Lindharin
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Topic: Da Vinci Jr 1.0 with Simplify3d

Hello,

Are any of you successfully using an unmodified Da Vinci Jr 1.0 with the Simplify3D software, and if so have you shared your settings anywhere? 

I'm new to 3d printing, and I'm having difficulty getting it to work with Simplify3D.  The first layer almost never works.  I've tried maybe 2 or 3 dozen prints, tweaking settings each time, following the instructions on their Print Quality Troubleshooting page, and I have only gotten 2 to work successfully - but the overall quality of those two prints was quite nice.  When I use the original XYZWare software it is the exact opposite: it works consistently, always laying down a clean first layer, but the overall quality of the result is mediocre. I'd like to be able to use some of Simplify3D's features to see if I can get better results.

My two main issues are:

1.  When heating up, a significant amount of filament leaks out of the nozzle when using Simplify3D.  Using the normal XYZWare software, very little leaks out during the heating cycle, but with Simplify3D I get anywhere from 1-3 inches of dangling filament which sometimes curls up behind the nozzle where it is hard to reach in the last few seconds before the print starts.  Once it starts printing, this excess material almost always causes problems, even when using a brim.  If I'm lucky and the dangling filament gets scraped off outside the brim it may be okay, but most of the time some or all of the extra material is within the print area of the brim or the model and it then interferes with the rest of the first layer.  I've tried tweaking temperature, retraction settings, extrusion multiplier, etc. and haven't found a way to reduce or stop the leak.

Has anyone else had the same problem and found settings to fix it?  Alternatively, I'd like to have it start by printing a strip along one edge of the bed, far away from the model itself, like the XYZWare software does.  I haven't found a way to do that in Simplify3D though.  Is there some g-code I could put in the scripts section to have it do that at the start of each print?  Or can I create a simple model of a 4" long strip and always have both it and my actual model printed at the same time, and somehow force it to print the strip first? 

2.  The filament seems to come out thinner and less dense than it does when using the XYZWare software, and has much more difficulty sticking to the bed.  My two successful prints both involved using an extrusion multiplier of 1.25 or higher, but then I get a clicking noise during the print which sounds like it might be coming from the filament feed mechanism above the spool, which makes me nervous.  I just read an older post on here where someone mentioned lowering the print speed to 800 mm/min, and I haven't tried going that low yet.  I'll try that tomorrow.  Any other suggestions?

Thanks,
Lindharin

2 Reply by isaryk

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Re: Da Vinci Jr 1.0 with Simplify3d

Hi,

I have the same problems with my unmodified Junior 3in1. I bought the SW (Simplify3D) few weeks later and I am lets say slightly moody. I'm still trying different settings, but I'm not happy with the result.
I'm facing the same problems like you and I think the biggest and critical issue is printing the first layer.
I hope that we will resolve this soon together.

Have a great day

Vaclav

3 Reply by Lindharin

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Re: Da Vinci Jr 1.0 with Simplify3d

I've solved both issues, at least to some extent.

1.  Based on examples cobbled together from a few different forums, I've put together a GCODE starting script that draws the line of filament to prime the extruder, which helps solve the first issue.  I'm still tweaking it, but the current version is:

G1 Z10 E0 ;
G1 X20 Y140 F3000 ; get ready to prime
G1 Z0.2 E0 ;
G92 E0 ; reset extrusion distance
G1 X130 E15 F600 ; prime nozzle
G1 Y145 E1 F600 ; prime nozzle
G1 X20 E15 F600 ; prime nozzle

2.  The solution to the thin extrusion on the first layer not sticking was also found in a forum post:  on the Layer tab of the FFF Settings window, in the section labeled First Layer Settings, I have set it to 150% for the first layer height and width, and 10% for the first layer speed.  I'm also typically using a Brim on the Additions tab, with 10 outlines offset by 0.25 mm. 

Other settings that may be relevant are:
Extrusion Multiplier:  0.90
Extrusion Width: 0.40
Retraction Distance: 5 mm
Retraction Speed:  60 mm/s or 3600 mm/min
Wipe Nozzle is checked, distance 5 mm
Layer height and number of top/bottom layers and perimeters varies depending on quality, but I try to keep the number of layers times the layer height at more than 0.5 mm, so a minimum of 5 layers at 0.1 height, or 3 layers at 0.2 height, etc.
On the Temperature tab, I've removed the default set point at 190 degrees and replaced it at 210 since that is recommended for the filament I have.

The results have been pretty good.  I have more control and better results than I got with the default XYZWare software that comes with the printer.  I'm still learning what all the other settings do, but I'm now getting results at least equivalent to, and usually better than, what I got with the default software.

Let me know if these settings work for you, and if you find any other useful tweaks!
Lindharin

4 Reply by isaryk

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Re: Da Vinci Jr 1.0 with Simplify3d

I tried to set this up before this information:

Extrusion Multiplier 0,85 - 0,9
Retraction Distance 5 mm
Temperature 210
Printing Speed to 1000 mm/min

.....and the result are much better.

I will try your setting and let you know

Regards

Vaclav

5 Reply by wardjr

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Re: Da Vinci Jr 1.0 with Simplify3d

Why an extrusion width of .40?
If you have a .35 nozzle it should be set at .42
If you have a .40 nozzle it should be set at .48
Extrusion width is the tool path width.  Due to die swell you should use the numbers I listed.

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6 Reply by Lindharin

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Re: Da Vinci Jr 1.0 with Simplify3d

The Simplify3D profile for the daVinci Jr. started with .9 multiplier and a manual .4 width.  I'm unclear if that is a Simplify3D default for all their profiles, or if there is a reason they chose that for the daVinci Jr specifically.

I have read about the x1.2 ratio of extrusion width to nozzle width, and I did try a test print using .48 for extrusion width, but it left gaps between perimeters, especially around the corners, which I think means it was under-extruded.  I suppose I could up the multiplier to 1.0 with a .48 width, but I decided to go back to a .9 multiplier and .4 width since that was the profile's default. 

Would a .48 width and increased multiplier be a better approach?  What are the pros/cons of doing so?

Thanks,
Lindharin

7 Reply by Tin Falcon

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Re: Da Vinci Jr 1.0 with Simplify3d

Wardjr has been hear along time , IMHO it is wise to heed his advise, He knows what he is doing with 3d printing,

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8 Reply by carl_m1968

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Re: Da Vinci Jr 1.0 with Simplify3d

The problem with Simplify3D and it's profiles is they are machine specific, not machine model specific. That means that although they have one for machine X, it will only get you in the ballpark. You will still need to tweak and adjust for your specific machine. No two printers even under the same name and model are alike. They will both require slightly different settings to achieve optimal prints. I use Simplify3D exclusively but I have never used preset profiles because I know they would not work for my machine.

I would also go with Wards advise. I have been in 3D printing since the early days and those numbers are like golden rules. The multiplier can be used to tweak the extrusion a little more but the width to nozzle ratio should be those numbers set in stone.

If you have a .35 nozzle it should be set at .42
If you have a .40 nozzle it should be set at .48

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