1

Topic: Improving print quality on small items

As a 3D noob I have been using the Davinci with its defualt settings but after trying to print small components with rather poor results, I started messing around with Slic3r.

This is my model:
model01 (see attached)

This is what standard unmodified xyzware makes of it:
model02, model03 (see attached)

So from my understanding the printing speed is the main problem, especially the "hook" part on the biggest component needs very slow printing.

I then started using Slic3r with the hacked version of xyzware, which allows to read the gcode directly. I have used very slow speeds for printing in Slic3r, same as suggested in this post: how-to-get-best-quality-prints-from-xyz-da-vinci-10

The result now is this:
model04 and model05 (see attached)

This is an improvement overall, even my 1mm diameter holes are now printed nicely but the "hook" part is still a mess.

So what can I do? Is there a way to define certain areas of a print to go super slow? Or do I need a cooling fan? Or should I reduce the extrusion multiplier? Can that be done for a certain area only?

Any advice would be greatly appreciated.

Post's attachments

model01.jpg
model01.jpg 57.49 kb, 1 downloads since 2014-11-15 

model02.jpg 185.58 kb, 1 downloads since 2014-11-15 

model03.jpg
model03.jpg 265.03 kb, 1 downloads since 2014-11-15 

model04.jpg
model04.jpg 271.67 kb, 1 downloads since 2014-11-15 

model05.jpg
model05.jpg 98.08 kb, 1 downloads since 2014-11-15 

You don't have the permssions to download the attachments of this post.

2

Re: Improving print quality on small items

I have found one issue that improved the printing quality - my printer needed calibrating. I did the auto calibration which resulted in a much better print and I also set the slowest speed in Slic3r to 1mm/s. See attached picture.

Its still not great but slowly im getting there. Maybe I need to manually calibrate since I am not so sure about the auto calibration doing a good enough job.

Post's attachments

model06.jpg
model06.jpg 87.05 kb, 1 downloads since 2014-11-16 

You don't have the permssions to download the attachments of this post.

3 (edited by scobo 2014-11-16 08:24:42)

Re: Improving print quality on small items

I always calibrate manually after auto cal now. Even with a good z offset of say, 250 or less, I still find the print nozzle is too high from the bed. Usually, turning all 3 screws a quarter turn to the left is enough.
I would definitely try a fan right over the print. It helps a lot with tall, thin parts.

Davinci 1.0 with repetier firmware & E3D V6 Lite
Anycubic Photon DLP printer, Einscan-S 3D scanner
Simplify3d, 123D Design, Meshmixer
http://www.thingiverse.com/scobo/designs

4

Re: Improving print quality on small items

Progress. After an auto calibration and then a manual calibration with a piece of paper, I got much better results. I also reduced the print speed even more in Slic3r, now the slowest speed goes down to 1mm/s.

Post's attachments

model07.jpg 161.94 kb, 1 downloads since 2014-11-16 

You don't have the permssions to download the attachments of this post.

5

Re: Improving print quality on small items

The improvement you were able to make seem really good.  I'm also having poor quality print "troubles" on my Da Vinci Jr printer.  I've been tring to find a way to install the Repetier firmware onto my Da Vinci Jr, but all I can find are instructions for the Da Vinci, not the Da Vinci Jr. 

After scowering the internet I haven't found a way to flash the Repetier FW onto my printer.  Does anyone know of a way to get Repetier FW onto a Da Vinci Jr. printer?

6

Re: Improving print quality on small items

As far as I'm aware, it hasn't been ported yet for Jr.
There were some discussions about it here .... http://www.soliforum.com/topic/13769/da … tier-port/

Davinci 1.0 with repetier firmware & E3D V6 Lite
Anycubic Photon DLP printer, Einscan-S 3D scanner
Simplify3d, 123D Design, Meshmixer
http://www.thingiverse.com/scobo/designs