DIY cartesian build. issues tuning So i have built my 3D printer. Frame came from CR10 but there is not much left of it except 3 of the motors (X taken from Y and dual Z). My printer is running DuetWIFI, has 5" LCD panelDue, IR bed probe, E3D titan aero, NEMA23 on y axis, 420x410x8mm precision alumiunium plate with .5mm PEI on top and 1kW keenovo heater, running on preloaded Bosch Rexroth 15mm rails. X axis runs on LM THK 22mm linear rail and Z axis on IKO 12mm rails. Basically my bed has no slop whats so ever, extruder assembly rock solid with no play and Z rods dont seem to wobble. CpNyzsd.jpg mod_embed_images_loadimage('53ca770e043f595190f00b3f0cef8e46', '/forum/thumbcache/997/c0b/77e/a96/c80/8f0/950/956/37a/31b/42_800x400.png', 'https://i.imgur.com/CpNyzsd.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2FCpNyzsd.jpg', '', 810975, 800, 400, 'Loading image ...', false); O2IxfjU.jpg mod_embed_images_loadimage('36414610e4389cfc3b6c653433625c68', '/forum/thumbcache/2ac/786/11a/d21/dda/803/67a/5af/ba7/666/5b_800x400.png', 'https://i.imgur.com/O2IxfjU.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2FO2IxfjU.jpg', '', 810975, 800, 400, 'Loading image ...', false); NuvN01z.jpg mod_embed_images_loadimage('a7bb51c5294dc9baf273bcb7725a9963', '/forum/thumbcache/1b1/899/85b/dd5/798/510/378/d9f/55b/c04/ba_800x400.png', 'https://i.imgur.com/NuvN01z.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2FNuvN01z.jpg', '', 810975, 800, 400, 'Loading image ...', false); c7b1FRX.jpg mod_embed_images_loadimage('87b4f48b2dfdc0029482929900ba6df7', '/forum/thumbcache/9c7/d13/815/ab7/712/b2b/c02/680/60a/757/99_800x400.png', 'https://i.imgur.com/c7b1FRX.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2Fc7b1FRX.jpg', '', 810975, 800, 400, 'Loading image ...', false); Moki1v3.jpg mod_embed_images_loadimage('609448c37bd247950dc847b3820c4616', '/forum/thumbcache/8bb/8bd/bea/476/590/d6b/1b2/37a/06f/dd4/a4_800x400.png', 'https://i.imgur.com/Moki1v3.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2FMoki1v3.jpg', '', 810975, 800, 400, 'Loading image ...', false); GCWOUYb.jpg mod_embed_images_loadimage('053da0003eb9a71b1ade2ac8f19e1a0c', '/forum/thumbcache/fc3/96e/2c4/505/ffa/6a6/7d1/794/925/13f/7d_800x400.png', 'https://i.imgur.com/GCWOUYb.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2FGCWOUYb.jpg', '', 810975, 800, 400, 'Loading image ...', false); GK0pm1R.jpg mod_embed_images_loadimage('8efd3f66d469715afadc334365a80ece', '/forum/thumbcache/c2b/96a/26c/7af/56a/d74/16b/d94/aef/558/a0_800x400.png', 'https://i.imgur.com/GK0pm1R.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2FGK0pm1R.jpg', '', 810975, 800, 400, 'Loading image ...', false); I am having trouble diagnosing print quality issues so there might be someone who might help. I have some ringing or ghosting artifacts. My belts are tightened to 70HZ, my Z is braced and all is solid. I have it sitting on 40mm stone tile. I tried printing slow and fast. Setting my jerk from 700mm/min down to 50mm/min Lower values gave slightly better results but nothing considerable. Here are my settings at the moment: M92 X80.06 Y80.22 Z402.43 E823.54 ; Set steps per mm M566 X380 Y380 Z12 E120 ; Set maximum instantaneous speed changes Jerk (mm/min) M203 X10000 Y10000 Z1000 E1200 ; Set maximum speeds (mm/min) M201 X700 Y700 Z700 E9000; Set accelerations (mm/s^2) 2RewFv3.jpg mod_embed_images_loadimage('719f1c27c0ad164d6a4ae6d15e5a7658', '/forum/thumbcache/047/bd5/ad0/6fc/766/932/031/c51/931/468/95_800x400.png', 'https://i.imgur.com/2RewFv3.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.imgur.com%2F2RewFv3.jpg', '', 810975, 800, 400, 'Loading image ...', false); https://reprap.org/forum/read.php?1,810975,810975#msg-810975 Mon, 12 Oct 2026 08:12:10 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,810975,814797#msg-814797 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814797#msg-814797 dc42 General Sat, 17 Mar 2018 10:55:44 -0400 https://reprap.org/forum/read.php?1,810975,814780#msg-814780 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814780#msg-814780
Quote
dc42
Did it print the two perimeters in the same direction, or in opposite directions?

Wasn't paying attention, think opposite.
Whats weird is s3d was generating files over MB when slic3r 300kb]]> agniusm General Sat, 17 Mar 2018 06:53:03 -0400 https://reprap.org/forum/read.php?1,810975,814766#msg-814766 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814766#msg-814766 dc42 General Sat, 17 Mar 2018 05:23:39 -0400 https://reprap.org/forum/read.php?1,810975,814765#msg-814765 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814765#msg-814765
Quote
dc42
Which slicer did you use? Some slicers produce much more consistent gcode for circles than others.

OK, Went back to slic3r and the problem is gone. Weird, never would think it might have to do with slicer. It also stutters printing skirt in s3d and i read about it on duet forum. Really weird. So much work cause of 150USD slicer ?
Really glad i know where the problem lies as i was starting pulling my hair]]> agniusm General Sat, 17 Mar 2018 05:21:38 -0400 https://reprap.org/forum/read.php?1,810975,814760#msg-814760 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814760#msg-814760


Also changed Y steps from 80.22 to 85 and circle came out oval with the same yin yang artifact (could i have just came up with the name for 3D printing error? :D )
]]> agniusm General Sat, 17 Mar 2018 04:31:03 -0400 https://reprap.org/forum/read.php?1,810975,814758#msg-814758 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814758#msg-814758 agniusm General Sat, 17 Mar 2018 04:18:31 -0400 https://reprap.org/forum/read.php?1,810975,814757#msg-814757 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814757#msg-814757 dc42 General Sat, 17 Mar 2018 03:43:46 -0400 https://reprap.org/forum/read.php?1,810975,814756#msg-814756 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814756#msg-814756
[www.youtube.com]

You can see it has that bulge diagonally.

I will try to disable pressure advance now

P.S. Disabling pressure advance - no effect
Aligning Y pulley - no effect]]> agniusm General Sat, 17 Mar 2018 03:39:33 -0400 https://reprap.org/forum/read.php?1,810975,814753#msg-814753 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814753#msg-814753 agniusm General Sat, 17 Mar 2018 03:06:54 -0400 https://reprap.org/forum/read.php?1,810975,814718#msg-814718 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814718#msg-814718 agniusm General Fri, 16 Mar 2018 16:53:22 -0400 https://reprap.org/forum/read.php?1,810975,814717#msg-814717 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814717#msg-814717
You should not need to calibrate the axis steps/mm because they are defined to fairly close tolerances by the pulleys, belts and leadscrews that you use.]]> dc42 General Fri, 16 Mar 2018 16:51:22 -0400 https://reprap.org/forum/read.php?1,810975,814714#msg-814714 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814714#msg-814714
I tried moving my right pulley up so it is parallel to X and printing 3 round tubes was rendering most left tube to be roundest which is counter intuitive.]]> agniusm General Fri, 16 Mar 2018 15:52:04 -0400 https://reprap.org/forum/read.php?1,810975,814707#msg-814707 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814707#msg-814707 dc42 General Fri, 16 Mar 2018 14:57:08 -0400 https://reprap.org/forum/read.php?1,810975,814695#msg-814695 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814695#msg-814695 agniusm General Fri, 16 Mar 2018 13:19:04 -0400 https://reprap.org/forum/read.php?1,810975,814684#msg-814684 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814684#msg-814684 dc42 General Fri, 16 Mar 2018 12:17:52 -0400 https://reprap.org/forum/read.php?1,810975,814651#msg-814651 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,814651#msg-814651 I might have a slight misalignment. I reused creality CR10 pulley and it is larger than the one on the motor side. I have teethed one so i might swap it. Y axis i think is better. Here are some photos of the belts








]]> agniusm General Fri, 16 Mar 2018 09:13:33 -0400 https://reprap.org/forum/read.php?1,810975,811215#msg-811215 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,811215#msg-811215
This picture illustrates what happens when you offset the belt anchor point and cause the belt segments not to be parallel to the guide rails.

[attachment 102766 beltoffset.jpg]

The difference in the path length (C+D) when the carriage is at different locations matters because belts don't like to stretch. The tension will increase as you get toward the ends of the motion, maybe enough to cause the motor to skip steps. The other thing that happens is the controller tells the carriage to move 20 mm, but since the belt isn't parallel to the guide rail, it won't move 20 mm it will move less than that. As you get closer to the ends of the axis, the belt gets further from parallel, as the 20 mm movement gets even shorter. This creates distortion in the prints.

If you want the carriage to move the exact amount it is instructed to move, the belts MUST be parallel to the guide rails.

If circles are not circles, the two most likely causes are that the belt paths are not parallel to the guide rails or the axes are not square.]]> the_digital_dentist General Tue, 20 Feb 2018 17:26:27 -0500 https://reprap.org/forum/read.php?1,810975,811210#msg-811210 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,811210#msg-811210 I am checking if i can compensate that in firmware and see if it makes a difference. I lean towards it cause changing steps would render more changing steps, i cant tune it in. That would explain why. If the axis are skewed , changing steps is no linear any more.]]> agniusm General Tue, 20 Feb 2018 16:26:23 -0500 https://reprap.org/forum/read.php?1,810975,811203#msg-811203 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,811203#msg-811203


The top is the bad situation, the bottom is how the belt should run. The segments of the belt that connect to the moving part (extruder carriage or bed) have to be parallel to the guide rail(s).
]]> the_digital_dentist General Tue, 20 Feb 2018 14:37:02 -0500 https://reprap.org/forum/read.php?1,810975,811176#msg-811176 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,811176#msg-811176





]]> agniusm General Tue, 20 Feb 2018 10:36:15 -0500 https://reprap.org/forum/read.php?1,810975,811041#msg-811041 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,811041#msg-811041
The vertical lines are probably the STL file's polygonal approximation of the curve.]]> the_digital_dentist General Mon, 19 Feb 2018 14:52:27 -0500 https://reprap.org/forum/read.php?1,810975,811029#msg-811029 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,811029#msg-811029 Next i now have consistent vertical lines as if it was made in sketchup with certain amount of lines forming imperfect circle. This was made in inventor and i had none on my prusa prints?! It does look round from the top








I now will fire up PETG and see whats going on.

BTW, how would you rate that seam?

Forgot to mention, that first grey PETG print was with hardened steel nozzle and i swapped it for brass to see if it makes any difference.
]]> agniusm General Mon, 19 Feb 2018 13:40:35 -0500 https://reprap.org/forum/read.php?1,810975,810986#msg-810986 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,810986#msg-810986 agniusm General Mon, 19 Feb 2018 09:48:13 -0500 https://reprap.org/forum/read.php?1,810975,810984#msg-810984 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,810984#msg-810984 agniusm General Mon, 19 Feb 2018 09:44:17 -0500 https://reprap.org/forum/read.php?1,810975,810983#msg-810983 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,810983#msg-810983 Add a tensioner/dampener at the return roller end.

I'd do a test cube print, to see if its just at the corners or along a whole edge. if whole edge its the belt.
My anet A2 has this problem, it has smooth return rollers. I can minimize it with tension, but it still visible in the reflections.
You could some spectra braided fishing line just to see if thats it.

If its just the corners its the accel/jerk combo.
Be sure your settings are being saved, if you have enabled the eeprom save.
Nothing worse than thinking you are changing a setting and its not being saved.

Finally, if you think all those are right, its like the previous post says, something about flow/retraction at the nozzle.

Nice build btw !]]> orbitalair General Mon, 19 Feb 2018 09:39:14 -0500 https://reprap.org/forum/read.php?1,810975,810982#msg-810982 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,810982#msg-810982
You are throwing a very massive bed and its support back and forth at print speed. It's going to ring. That's why large printers usually move the bed in Z instead of Y.

You can probably eliminate the ringing completely if you set the jerk/junction deviation to zero and reduce acceleration. But that may may introduce other problems (besides slowing printing to a crawl)...

I built a machine with a 300x300 bed and ultimately replaced the Y axis belt with a precision ground ball screw. It almost completely eliminated ringing, but it's pretty loud. All that metal to metal contact is very efficient at transferring vibrations from the motor to the bed plate. That printer is limited to 40mm/sec print and travel speed. Click the son of megamax link in my sig, below.]]> the_digital_dentist General Mon, 19 Feb 2018 09:35:01 -0500 https://reprap.org/forum/read.php?1,810975,810978#msg-810978 Re: DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,810978#msg-810978 jerryjs8 General Mon, 19 Feb 2018 09:24:59 -0500 https://reprap.org/forum/read.php?1,810975,810975#msg-810975 DIY cartesian build. issues tuning https://reprap.org/forum/read.php?1,810975,810975#msg-810975 My printer is running DuetWIFI, has 5" LCD panelDue, IR bed probe, E3D titan aero, NEMA23 on y axis, 420x410x8mm precision alumiunium plate with .5mm PEI on top and 1kW keenovo heater, running on preloaded Bosch Rexroth 15mm rails. X axis runs on LM THK 22mm linear rail and Z axis on IKO 12mm rails. Basically my bed has no slop whats so ever, extruder assembly rock solid with no play and Z rods dont seem to wobble.















I am having trouble diagnosing print quality issues so there might be someone who might help. I have some ringing or ghosting artifacts. My belts are tightened to 70HZ, my Z is braced and all is solid. I have it sitting on 40mm stone tile. I tried printing slow and fast. Setting my jerk from 700mm/min down to 50mm/min Lower values gave slightly better results but nothing considerable. Here are my settings at the moment:

M92 X80.06 Y80.22 Z402.43 E823.54 ; Set steps per mm
M566 X380 Y380 Z12 E120 ; Set maximum instantaneous speed changes Jerk (mm/min)
M203 X10000 Y10000 Z1000 E1200 ; Set maximum speeds (mm/min)
M201 X700 Y700 Z700 E9000; Set accelerations (mm/s^2)


]]> agniusm General Mon, 19 Feb 2018 09:13:49 -0500