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vertical ridges in round portions of prints

Posted by Peritus 
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Peritus
vertical ridges in round portions of prints
January 10, 2015 07:44AM
Hello,

I'm new to the forum.
I have an Orcabot 3D Printer.

For some time now, the printer is acting a bit strange.
There are some vertical ribs in all the 3D prints.
But only on the curved parts, straight parts don't have the same issue.
I printed a ring for example. this used to be smooth.
are there some settings in the firmware I can change?
thanks in advance guys,
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Attachments:
open | download - 3d print.jpg (87.5 KB)
grog
Re: vertical ridges in round portions of prints
January 12, 2015 03:19PM
Is this the same print as what you had done before? As in the same model? It is possible the 'resolution' of the model is different. The motors don't actually move in a perfect circle, they make a lot of tiny straight lines to make it look like a circle.
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Peritus
Re: vertical ridges in round portions of prints
January 13, 2015 03:05AM
Yes its the same model.
the ribs occur in all prints I make, models I printed before look a lot smoother.
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Chri
Re: vertical ridges in round portions of prints
January 13, 2015 07:08AM
Have you checked if the belts are loose ?
how is the manual movement of the carriers when the steppers are not connected to the board, it should rund relatively smooth with no stumble.

Chri

[chrisu02.wordpress.com] Quadmax Intel Delid Tools
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Peritus
Re: vertical ridges in round portions of prints
January 13, 2015 07:19AM
The belts are good, the run very smooth.

A friend told me to check the XY jerk.
What should be a good setting?
I tried 0 and 200 there is a difference but small.
Is there a way to increase the XY resolution? I think maybe the resolution is poor.
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Chri
Re: vertical ridges in round portions of prints
January 13, 2015 07:42AM
You can only change the resolution by using different motors (0.9° instead of 1.8°) and a new electronics which is capable of 1/16 stepping or even more.
but thats not the issue of your printquality.

Yerk should be about 10-15 and acceleration about 1000 to 1500 on a stock Orca.

a other issue maybe a faulty electronics where the stepper is only making fullsteps anymore instead of microstepping, but i don`t think this is the issue.

can you make a video when you print the round part ?

Chri

[chrisu02.wordpress.com] Quadmax Intel Delid Tools
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Peritus
Re: vertical ridges in round portions of prints
January 17, 2015 07:14AM
took a while, but here is a video.

[youtu.be]

Looking at it print, Maybe its the micro stepping not working.
I think it looks like it.

Edited 1 time(s). Last edit at 01/17/2015 07:15AM by Peritus.
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Peritus
Re: vertical ridges in round portions of prints
January 17, 2015 07:17AM
I Will post a video printing a more round object later today,
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Peritus
Re: vertical ridges in round portions of prints
January 17, 2015 07:40AM
here is a video printing a doorstop with round edge. on the print is shows really bad vertical ribs.

[youtu.be]
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Chri
Re: vertical ridges in round portions of prints
January 17, 2015 12:58PM
Doesn`t sound like its running on full step, for me it sounds normally (except on that z-hop, i wouldn`t do that, it only costs speed)
Not easy to tell why it`s doing that on the video sad smiley
Can you upload the gcode file of the 2nd part
?

Maybe you can make a video when the printer is off, and moving the axis around while seeing the belts (overview) and to listen to the sound of them.

Chri

[chrisu02.wordpress.com] Quadmax Intel Delid Tools
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GMTminer
Re: vertical ridges in round portions of prints
January 18, 2015 01:23AM
I was having the same issue with my printer. I went onto the irc and a few members stated that it could be the model itself. Possible that the circles do not have enough segments?
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