<![CDATA[SoliForum - 3D Printing Community — Moire - Might not always be in the printer]]> https://www.soliforum.com/topic/3924/moire-might-not-always-be-in-the-printer/ Thu, 24 Oct 2013 10:51:58 +0000 PunBB <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/39830/#p39830 I think everyone will find that running 1/32 microstepping on ALL axi (particularly with a fine-pitch z-rod) means you slam into Marlins 10KHz planner limit... 40000pps which often has 4 steps a planner loop, which means its a 10khz limit .... looong before 'decay' becomes an issue...

]]> Thu, 24 Oct 2013 10:51:58 +0000 https://www.soliforum.com/post/39830/#p39830 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/39784/#p39784 2n2r5 wrote:

I don't know which version he did that on.

If you look at the pic closely at the photo on http://reprap.harleystudio.co.za/?p=321, it shows the '01C' connection, which makes it a MD20B.

MD20A:
http://b.pololu-files.com/picture/0J4120.600.jpg?afb8357d5f463abf010936bcc0f45e3b

MD20B:
http://a.pololu-files.com/picture/0J4225.600.jpg?20a0720dc4bdcd076dfe1cdbd1c9dd1e

]]> Thu, 24 Oct 2013 00:08:30 +0000 https://www.soliforum.com/post/39784/#p39784 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/39780/#p39780 I don't know which version he did that on. I have the MD20B. That might be the MD20A which needed a hack to get to work correctly. Adrian ended up with those. I think it needs a 4.7K pull up resistor in-line some where to work. I do have a couple spare DRV8825 md20b drivers that are questionable. I will test this out and see how it does.

]]> Wed, 23 Oct 2013 23:56:58 +0000 https://www.soliforum.com/post/39780/#p39780 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/39769/#p39769 Have you tried this mod 2n2r5?

http://reprap.harleystudio.co.za/?p=321

]]> Wed, 23 Oct 2013 22:12:59 +0000 https://www.soliforum.com/post/39769/#p39769 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38698/#p38698 2n2r5 wrote:
techbuilder2175 wrote:

Hi 2n2r5,

Did you ever think of adding rickq front bed stabilization?

http://www.soliforum.com/topic/3407/fro … ed-wobble/


Yep, sure have. I have to acquire some parts. I think I may just use bearings on a spring loaded arm. I am a little concerned about how much pressure I will be putting on the sides. My bed has a bunch of play when you lift the front of the bed. I don't want introduce any backlash in the bed due to excess pressure keeping the front of the bed from falling.

Or,

I ignore the problem and build my new machine.

smile

Your so close though!
I would make this the last thing you do to your solidoodle
just so you can have closure lol

]]> Fri, 11 Oct 2013 19:12:27 +0000 https://www.soliforum.com/post/38698/#p38698 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38695/#p38695 techbuilder2175 wrote:

Hi 2n2r5,

Did you ever think of adding rickq front bed stabilization?

http://www.soliforum.com/topic/3407/fro … ed-wobble/


Yep, sure have. I have to acquire some parts. I think I may just use bearings on a spring loaded arm. I am a little concerned about how much pressure I will be putting on the sides. My bed has a bunch of play when you lift the front of the bed. I don't want introduce any backlash in the bed due to excess pressure keeping the front of the bed from falling.

Or,

I ignore the problem and build my new machine.

smile

]]> Fri, 11 Oct 2013 18:53:19 +0000 https://www.soliforum.com/post/38695/#p38695 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38610/#p38610 Hi 2n2r5,

Did you ever think of adding rickq front bed stabilization?

http://www.soliforum.com/topic/3407/fro … ed-wobble/

]]> Thu, 10 Oct 2013 18:38:07 +0000 https://www.soliforum.com/post/38610/#p38610 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38287/#p38287 Velocity is the rate of change of position.
Acceleration is the rate of change of velocity.
Jerk is the rate of change of acceleration.

]]> Sun, 06 Oct 2013 15:18:49 +0000 https://www.soliforum.com/post/38287/#p38287 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38285/#p38285 johnforeman wrote:

What is the X-Y jerk tuning?

edit: see Tim's comment


There isn't a tuning option really. You can just alter the value in the Firmware EEPROM Configuration. I would suggest not changing the default value unless you are comfortable with it.

]]> Sun, 06 Oct 2013 15:04:02 +0000 https://www.soliforum.com/post/38285/#p38285 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38278/#p38278 Excellent thread, thank you.

]]> Sun, 06 Oct 2013 13:43:34 +0000 https://www.soliforum.com/post/38278/#p38278 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38268/#p38268 What is the X-Y jerk tuning?

]]> Sun, 06 Oct 2013 11:18:05 +0000 https://www.soliforum.com/post/38268/#p38268 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38234/#p38234 I'm like 70% sure that it is my filastruder filament. I think the auto white balance on the camera did that. The back ground should be a bit more yellow than it is.

I'm going to go ahead and say it is.

]]> Sun, 06 Oct 2013 01:33:31 +0000 https://www.soliforum.com/post/38234/#p38234 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38231/#p38231 Is that Filastruder filament? It looks too white for ABS natural.

]]> Sun, 06 Oct 2013 01:19:19 +0000 https://www.soliforum.com/post/38231/#p38231 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/38230/#p38230 After doing everything that one could do to eliminate moire caused by the extruder stepper motor I started looking at other factors. I looked through a bunch of prints from other printers and noticed that even at its best, my printer was having trouble matching some of the big dollar printers. One of the biggest differences was how the bed was supported. Every other high dollar printer seems to have a wider support structure or the bed is supported from 2 sides.

Before: This is my basic print at .15mm layers @ .3mm Wall width. I generally run around 60mm/s for a standard print. I also have X-Y jerk turned up to 30mm/s to take advantage of my bigger steppers and stiff spectra line drive.
http://2n2r5.com/pictures/printer/show-n-tell/moire_corners.JPG
http://2n2r5.com/pictures/printer/show-n-tell/moire_corners2.JPG







After: .15mm layers @ .3mm Wall width at 75% feedrate and 20mm/s X-Y jerk.
http://2n2r5.com/pictures/printer/show-n-tell/moire_fixed.JPG
http://2n2r5.com/pictures/printer/show-n-tell/moire_fixed1.JPG
http://2n2r5.com/pictures/printer/show-n-tell/moire_fixed2.JPG

The difference is very noticeable. Slowing down the print and reducing the X-Y jerk muted the ripple substantially. You can see that corners are no longer followed up by a deep ripple. All other moire is all but gone. Not only am I happy with this print but I am done trying to get better quality. The only upgrade that would help me with quality is a bed support system for the front.

]]> Sun, 06 Oct 2013 00:59:57 +0000 https://www.soliforum.com/post/38230/#p38230 <![CDATA[Re: Moire - Might not always be in the printer]]> https://www.soliforum.com/post/36756/#p36756 Stevos758 wrote:

Can you point me in the direction to some pics of your setup? Is there any mods needed for the new stepper or is it plug and play(besides firmware settings?)

I won't be able to get you pictures until the weekend probably but there isn't much to see. It is a direct replacement for the stepper motor already there. Just longer and now without a fan.

]]> Wed, 18 Sep 2013 23:08:40 +0000 https://www.soliforum.com/post/36756/#p36756