Problem with detail on print  

Re: Problem with detail on print

Is this a test/benchmark print? If so please add a link to download the file and lets see.

Re: Problem with detail on print

Looks a bit over extruded, have you calibrated your extruder?
Gaps along the outline can probably be fixed with Infill Overlap.
Also this small details will need a slower speed, I would lover the speed when it reaches the last mm of the print.

Re: Problem with detail on print

Well, from what I can tell by looking at your photo, it looks like you are trying to achieve something that is almost impossible...

What extrusion line width are you using? As Patrik suggests, you are over-extruding a little and you need to calibrate the filament feed.

What is the line width of the characters you are trying to print? Looks to be about 0.5mm. You probably need to increase the size of the characters or print the model with a smaller nozzle (0.25mm and use a 0.25mm extrusion).

To get close with the hardware you have, calibrate the filament and extrude at 0.4mm. Try to increase the line width of the characters to 0.8mm

Peter

Re: Problem with detail on print

Thanks everyone.
Peter I agree the numbers are small and I am going to change that to a better font. Not trying to force the impossible here!! But in the mean time this is a good test for the new machine to fine tune.

I am using the defaults in S3D from the RC4fff. I think the line was at .45 and the extrusion multiplier at 100 for PLA which I questioned since it is not what I use on my other printers for PLA but this is a different printer. I figured though the principal should be the same.

As far as the line width of the characters it was simply set for 2 shells I think.

In regards to calibrating the filament feed would someone mind pointing me to instructions on how to do it for this machine?
I don't calibrate on my other machines in the traditional fashion (measure the filament etc.) since it is controlled via extrusion multiplier with Sailfish.

Re: Problem with detail on print

Do you get stringing between between the 6 and the " (the big letters '1/16"')? Looks like there are almost some bridges. Maybe your retraction is off? And for the surface finish (the small letters) you could try combing (Cura) (stay within printed areas while moving).

Re: Problem with detail on print

Link to extruder calibration: http://shop.prusa3d.com/forum/original-prusa-i3-mk2-f23/mk-2-extrusion-problems-t1600.html#p12960

You can either use the slicer extrusion multiplier or change the extruder steps with GCode.

Peter

Re: Problem with detail on print

Link to extruder calibration: http://shop.prusa3d.com/forum/original-prusa-i3-mk2-f23/mk-2-extrusion-problems-t1600.html#p12960

You can either use the slicer extrusion multiplier or change the extruder steps with GCode.

Peter

Thanks Peter,
I'll look at the extrusion multiplier first since I am used to that with S3D.
What do you recommend as a default for PLA with the MK2? I am used to 90 (S3D) for PLA on my other machines (Flashforge creator pro's) but I think this profile is defaulting to 100.

Re: Problem with detail on print

Do you get stringing between between the 6 and the " (the big letters '1/16"')? Looks like there are almost some bridges. Maybe your retraction is off? And for the surface finish (the small letters) you could try combing (Cura) (stay within printed areas while moving).

I didn't notice that! I am using the default retraction, I think .8. What would be recommended for the MK2 using PLA?

Re: Problem with detail on print

Each filament type and colour can require a different extrusion multiplier, so it depends on how accurate you want your prints to be.

Basically it boils down to the diameter and hardness of the filament in use and the pressure of the filament tension springs. Different colour pigments slightly modify the hardness and diameter will vary during manufacture.

With regards to retraction, stick with the default for now; you may want to try tweaking that a bit when you have everything else dialled in.

You may also find that different slicers will produce significantly different results.

Peter

Re: Problem with detail on print

Sounds good Peter, I do have the print running from Slic3r and Pronterface to see how it comes out. Never used either before. I started out with S3D on my other machines.
It's looking like Slic3r may be the go to one for the MK2 especially with the work Prusa is doing on it.

Re: Problem with detail on print

Here is the same file but printed with the most recent Prusa Slic3r version. Not bad and a slight improvement on the numbers.

I am now going to test settings in S3D taking into account suggestions and what I am familiar with. We will see how we do.

Now, I know these numbers won't get perfect but it is a good test to see how I can improve on them.

Re: Problem with detail on print

There is an interesting thread you may want to take a look at here: http://shop.prusa3d.com/forum/print-tips-slic3r-settings-kisslicer-model-repair--f12/difference-between-slic3r-and-cura-t1820.html

Peter

Re: Problem with detail on print

That's a very good print imho.

But what is it ? 🙂

Re: Problem with detail on print

That is interesting PJR. I may look at KISSlicer but if Slic3r is the one that is going to be what PR goes to then I need to start to learn it first! Good to have options though and I will try to check it out this weekend.

I did reduce the extrusion width from .45 to .4 in S3D and the areas around the small numbers did improve some. I also tried dropping the extrusion multiplier to .9 and I didn't look at it enough to decide if it helped.

I guess I will go back to an extrusion multiplier of 100 since that seems to be what everything for this printer is defaulting to.

Re: Problem with detail on print

I guess I will go back to an extrusion multiplier of 100 since that seems to be what everything for this printer is defaulting to.

You have to understand what the extrusion multiplier is looking to counteract, and that will differ between printers and filament:

All these will differ between printers and filament; the extrusion multiplier needs to be set ideally at both printer and material levels. Some slicers only allow it to be set for the material; the printer settings can then be changed by using GCode to alter the steps/mm.

It is only when you have the extrusion correctly calibrated that you will be able to print very fine detail.

Actually, bottom line is that you adjust what you want to make the printer do what you want it to. 😉

Peter

Re: Problem with detail on print

Very much appreciate all of the info and guidance.