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No offense Jim but that sucks! What is your machine config and I assume Repetier firmware?

I printed one in translucent red just because it was already loaded. It looks really nice but you can actually see the straight 25% infill "ends" through the sidewalls so it looks like banding but the surface is actually smooth. It looks very different than your photo. Those bands look pronounced enough to feel - can you actually feel them?

I just started the print, with S3D.

On a side note, get to try out some new black PLA with awesome temperature ranges...

Wow, what is that filament?

Nice looking banding. I bet you could not get that pattern on a part even if you wanted.

just some junk I got off amazon because it was cheap and on prime. This is my first print with it, so we'll see.

http://www.amazon.com/s/ref=bl_sr_indus ... e=16310091

Looks like mine is about the same. I can feel the banding on the flat sections more than the circle.

mhackney, Awesome "BandAid" model to test this problem, especially the hexagon offset with the square!

I will print this later when home from work.

Jimustanguitar, great link on how you can see the effect of how a stepper can be manipulated. More and more this seems to fit with how the controller software and motherboard handles the steppers and what the mathematical modeling/programming/output is for linear and curvilinear movement. This pattern would be exacerbated by all the parameters and variables of print settings, printer calibration, and printer speed as everyone has mentioned.

It would be interesting to print a single layer and look with a scanning election microscope, at this layer relative to the X, Y, and Z-planes as well as 30 degrees off of each axis. I bet the patten we are seeing would show up and would reflect the movement of the head which is a very fine "Z" pattern with a variable frequency pending the position on the print bed. This Z pattern would be affected by the angle of the print line relative to the X,Y and Z-axes and the precision of the print settings, printer calibration and speed.

I will print using MatterControl.

mhackney wrote:No offense Jim but that sucks! What is your machine config and I assume Repetier firmware?

Newest Repetier from the SeeMeCNC Git (about a month old) on a Rambo 1.1b. 20 tooth pulleys... Pretty standard.

No idea what revision Rambo but its all stock except the .4 E3D V6 with same Repetier #define REPETIER_VERSION "091S"

This is the other issue I've been looking into:
http://forums.reprap.org/read.php?1,214 ... msg-214990

I'm wondering if the banding is somehow related to the smooth idler and the toothed belts as mentioned in the post.

Here are two pictures of my print. Note the line in the middle of the hexagon - happened when I close the keyboard drawer of my desk too hard!

Back to the test print....... What I noticed was that looking straight at the print (as it printed - second image looking straight at the square) you can see that the top square layer has banding which is deeper and a higher frequency than looking at the front edges of the hexagon which are 45 degrees off if the square. The edges of the hexagon which are parallel to the edges of the square has the same level of irregularity as the square but as noted the frequency is less. The circle has banding but is less than the straight edges. With the circle, the frequency is even less than the hexagon.

This was printed with MatterControl using MaterControl Slicer. I am printing another one now using Cura Slicer with MatterControl since I noticed the steppers sounded different with the Cura print.

Dan

This is with the stock ezStruder and normal stepper. Running 32 microsteps on an Azteeg X3 Pro Repetier 0.93.3 firmware printed via repetier host on a mac
Interestingly, there is an obvious diagonal banding on the hex and square on all sides but none on the cylinder. I'll switch over to my geared stepper ezStruder and print another. Time is tight this weekend with Easter preparations and I head to Rochester, NY early Monday for my first day on the new job. Hopefully I can get this print done before then, otherwise it will be next Friday.

mhackney wrote:This is with the stock ezStruder and normal stepper. Running 32 microsteps on an Azteeg X3 Pro Repetier 0.93.3 firmware printed via repetier host on a mac

FullSizeRender.jpg

Interestingly, there is an obvious diagonal banding on the hex and square on all sides but none on the cylinder. I'll switch over to my geared stepper ezStruder and print another. Time is tight this weekend with Easter preparations and I head to Rochester, NY early Monday for my first day on the new job. Hopefully I can get this print done before then, otherwise it will be next Friday.

Interesting! I do see the diagonal banding and it looks like there is also some subtle vertical banding!?

I looked at every angle in low light and direct sun light and do not see any diagonal banding at all. Just the vertical banding. The circle as mentioned looks good except were the outer edge crossed over.

Here is my Cura Sliced print! The cylinder is near perfect. The hexagon is worse than the square.

I don't have any difference in any of the flat surfaces, matter of fact it even lines up when you reflect the correct way when looking from above.
That's really the trick. The parts don't look bad in person, it's just aligning it a certain ways so the camera picks up the variations.

Ultimately, I'm trying to make it look as bad as possible.

Agree. Here is a close up. As close as I can get it and focus. This is as bad as I can make it which is in moderate light. This is my second Cura Sliced print..

I think what is interesting is that the banding you get is the same on the square and it looks similar on the hexagon when the edges are parallel. With my print they look different. ???

As another sample from a crazy expensive printer, this was just printed on a PolyJet printer. High resolution print and still has bands.

jdurand wrote:As another sample from a crazy expensive printer, this was just printed on a PolyJet printer. High resolution print and still has bands.

Then you look at printers like the Stacker 3D. Fantastic looking prints, although they're only posting what they want you to see right now. But at-least they have a video of it printing.


[youtube]http://www.youtube.com/watch?v=MsyMWCGKJz8[/youtube]

I've been impressed with the prints from Mass Portal, that's a delta too. They obviously wouldn't post a picture of a bad print, but I can't see any accidental mistakes or flaws in these prints.

[img]https://scontent-ord.xx.fbcdn.net/hphot ... e=55992763[/img]

[img]https://fbcdn-sphotos-f-a.akamaihd.net/ ... 92e88e0672[/img]

[img]https://scontent-ord.xx.fbcdn.net/hphot ... e=559BED34[/img]

yea, Those do look good.

Spec wise, nothing out of the ordinary. They don't list in detail the mechanical side, but I'm sure that can be found.

This is a good sign --> Repetier-Firmware printer control software


http://massportal.com/en/products/pharaohed/specs

I am printing one too just for the hell of it. I am seeing pretty much 100% infill though. My settings are 60% concentric, Matterslice/control.

ABS 217 Bed 80. Speed is between 20-25mm/s and 30mm/s for infill.

This actually turned out pretty good on mine. You can see some of the banding on the middle but not much on the other sections. I tried to get it to show in the light reflect but this was a bad as it got. I am still in the 'print it slow' stage. Yes slow does work... Its just well, slow. 2hrs 50mins to print.

This is actually one of the best prints I have done on my printer.

drunkenmugsy wrote:I am printing one too just for the hell of it. I am seeing pretty much 100% infill though. My settings are 60% concentric, Matterslice/control.

I had better luck in MatterControl using Decimal values over percentage. .60 versus 60%


Edit, sorry was at work and couldn't see the image. That's weird how MC shows it solid but it's printing with gaps.

I just looked at some prints done by a Fortus, it has NASTY vertical banding, one of the parts I kinda wonder if its designed in, its wavy with the pitch of about 1/4" and amplitude about .020" Another print that is going has ripple effects after lettering like I get when I print over 100mm/s

Jesus Christ, I need one of these: https://www.youtube.com/watch?v=tO_RaxDHxyU