1 (edited by Zirak 2016-12-25 04:04:50)

Topic: ABS Prints coming out with horizontal lines/bumps

Hey Guys,

I am using Lustran ABS Filament (pellets melted using filastruder), and have been getting a constant line/bump pattern on my 3d prints. I am printing at 260C with 100C heated bed on painters tape with ABS juice. Has anyone ever encountered this type of issue, and have any suggestions on how to remedy it?

http://i66.tinypic.com/ml5e2x.jpg

Object being printed is this: http://www.thingiverse.com/thing:126567


Thanks!

2

Re: ABS Prints coming out with horizontal lines/bumps

looks like a bent z screw

Sd4 #9080 with a glass bed. E3d chimera duel extruder. Paste extruder , duet wifi.
Lawsy carriages. linear bearings. Y axis direct drive, Kinect scanner
SD4#8188 glass bed, lawsly carriages, E3d v6, octoprint http://www.ustream.tv/channel/hotrod96z28
Filastruder/filawinder, Custom Delta 300mm x 600mm

3

Re: ABS Prints coming out with horizontal lines/bumps

It is called Z banding and could be caused by a loose bed or bent lead screw. I also believe you have to use an odd number for the layer height on your particular printer because the thread is non standard. If it happens at regular intervals like that the issue is almost always mechanical.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

4

Re: ABS Prints coming out with horizontal lines/bumps

Tells us a bit more about your Z-axis,  we might be able to help you calculate your layer heights so prints come out better.

MonoPrice Mini Select,  Orion Delta, HeartlessTech I3 2020, TWO Taz-5,  8 Wanhao Clones
Filistruder (Operational)  (Scanners RMA'd Due To Missing Components)
Benchtop Molding Press,  Arburg All-Arounder IMM,   Bridgeport ProTrac, Monarch 10EE Lathe,  Light Machine CNC Mill & Lathe
(THIS IS JUST MY HALF OF THE WORKSHOP MUAHAHAHAHA)

5

Re: ABS Prints coming out with horizontal lines/bumps

A bit more info would be very useful here..

What kind of printer?
What layer height?

SD4 #1 & #2 - Lawsy carriages, E3D v6, Rumba controller board, mirror bed plate, X motor fan, upgraded PSU & Mica bed heater
SD4 #3 - in the works ~ Folgertech FT-5, rev 1
Printit Industries Beta Tester - Horizon H1

6

Re: ABS Prints coming out with horizontal lines/bumps

While it may be Z banding, I would like to point out that most pellets need to be dried before extruding with your Filastruder. It looks like you either did not dry or perhaps did not dry enough. That is, if it indeed is not a Z issue.

Swap for a trusted roll of ABS to see if it disappears.

Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!

7 (edited by Zirak 2016-12-25 16:51:12)

Re: ABS Prints coming out with horizontal lines/bumps

Hey Sorry for the late response, I am using a Afinibot A3 3D Printer (Based on Prusa i3 I believe).
I re-adjusted the Z axis on both sides using a ruler to measure, it seems like it was slightly off.

I am waiting for my 3D printer to boot up, I get two rows of squares for like 15 minutes before it actually turns on... which is weird, it started doing it recently, before it booted up instantly. The layer height is set to 200 microns, I've printed perfectly fine with PLA, and even in ABS. Though I think you guys might be right about the Z-Axis, because I recall it made a squeaking noise when it was resetting the position. After it finishes booting, I will try moving the Z-Axis using the repetier host software to see if it still squeaks to see if my fixes the squeaking problem. Anyone know of a fast printing model I can try to test to see if this will happen again? (The one I used took 11hours 30 mins)

Edit:
Taking longer than I thought to boot (waiting 45 minutes...)

8

Re: ABS Prints coming out with horizontal lines/bumps

Just a simple 30mm by 30 mm cal cube will tell you if you have banding issues or not.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

9

Re: ABS Prints coming out with horizontal lines/bumps

Modern electronics should boot instantly.

You got a board failure in the works first of all.

Address that and you may get lucky and see the Z-banding go away...

MonoPrice Mini Select,  Orion Delta, HeartlessTech I3 2020, TWO Taz-5,  8 Wanhao Clones
Filistruder (Operational)  (Scanners RMA'd Due To Missing Components)
Benchtop Molding Press,  Arburg All-Arounder IMM,   Bridgeport ProTrac, Monarch 10EE Lathe,  Light Machine CNC Mill & Lathe
(THIS IS JUST MY HALF OF THE WORKSHOP MUAHAHAHAHA)

10 (edited by carl_m1968 2016-12-25 23:37:27)

Re: ABS Prints coming out with horizontal lines/bumps

BurningRingOfFire wrote:

Modern electronics should boot instantly.

You got a board failure in the works first of all.

Address that and you may get lucky and see the Z-banding go away...

Actually there are a few printers I know of that preheating is part of their start up and they show nothing on the screen during the preheat cycle. So his could be one of those and the heater that is in question could be going out. Could also be a failing power supply. There are a number of things that could be at fault here. He is just going to have to cut them down as he can and figure out what is not at fault first. I find it easier to find what is not the problem first.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

11 (edited by Zirak 2016-12-26 02:00:22)

Re: ABS Prints coming out with horizontal lines/bumps

I used a hair dryer to heat it and within a millisecond it turned on... I think it's not preheating by itself, and as soon as it gets a bit warm it turns on. My room is super cold because of the winter, maybe that's why it started recently...


And because I'm such a dolt, I broke the throat screw for the extruder, and it snapped within both the hot end plate, and the plate below the extruder gear.... I tried to remove both of them but they're stuck in there good.

Good news is I can get a replacement throat screw and the aluminum extruder hot end plate... but I couldn't find the part of the plate below the extruder gear, see screenshot attached lol.

The thing in the screenshot is the part I can't find, but the other two parts I was able to order:
1. http://www.robotshop.com/ca/en/afinibot … -tube.html
2. http://www.robotshop.com/ca/en/afinibot … block.html

So yeah, totally unrelated problem now. I opened a support ticket with Robotshop to see if I can some how purchase just that piece alone.

Post's attachments

IMG_3487.JPG
IMG_3487.JPG 1.88 mb, file has never been downloaded. 

IMG_3488.JPG
IMG_3488.JPG 1.6 mb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.

12

Re: ABS Prints coming out with horizontal lines/bumps

They'll probably sell you  the whole hot-end.     When I had a component fail on my Mini they sent the the entire hot-end assembly rather than just the block.

Same with the E3D I got from Matter Hackers.  Someone screwed up building it wink and something something stuck-snap-damn-it,   they just sent me a replacement block and tube.

MonoPrice Mini Select,  Orion Delta, HeartlessTech I3 2020, TWO Taz-5,  8 Wanhao Clones
Filistruder (Operational)  (Scanners RMA'd Due To Missing Components)
Benchtop Molding Press,  Arburg All-Arounder IMM,   Bridgeport ProTrac, Monarch 10EE Lathe,  Light Machine CNC Mill & Lathe
(THIS IS JUST MY HALF OF THE WORKSHOP MUAHAHAHAHA)

13 (edited by Zirak 2017-01-04 05:54:03)

Re: ABS Prints coming out with horizontal lines/bumps

Got a new throat screw, and aluminum block and now I'm back in action.

Problem seem to have worsen, even though I was able to re-align the Z Axis to be identical for both sides.

See screenshot attached of the 30mm cube print. Any suggestions on what I can try to do to improve it? Maybe I messed up something... (disregard the "jizz marks" on the keyboard, I accidentally spilled acetone+abs mixture on my keyboard... stupid right?)

Printed @ 245C
http://i65.tinypic.com/210c1f8.jpg

Printed @ 260C
http://i66.tinypic.com/2v84gig.jpg

(Rotation screwed up, it's actually 90 degrees to the right the lines are horizontal not vertical)

14

Re: ABS Prints coming out with horizontal lines/bumps

Long shot, but over extruding could also be an issue here...have you calibrated using a single-walled cube?

SD2 - Stock - Enclosure - Heated Bed - Glass Plate - Auto Fire Extinguisher
Ord Bot Hadron - RAMPS 1.4 - Bulldog XL - E3D v6 - 10" x 10" PCB Heated Build w/SSR - Glass Plate
Thanks for All of Your Help!

15 (edited by Zirak 2017-01-04 17:29:25)

Re: ABS Prints coming out with horizontal lines/bumps

Not yet, will try that when I get home from work today.

So you're saying there may be inconsistency in the filament diameter causing over extrusion in the print..? I'm thinking of picking up some calipers on the way home today. Also, the prints above was using 15% infill, should I try with no infill as well?

16

Re: ABS Prints coming out with horizontal lines/bumps

For a single-walled cube, slice it with 0% infill, 1 perimeter, no bottom or top layers...(a 1mm brim would help for adhering) also set your extrusion multiplier to 1 and measure and enter an accurate filament diameter. This should print out a single-walled cube.  Then with calipers, measure the wall thickness.  It should be whatever your nozzle diameter is X 1.2...so for a 0.4 nozzle you should be at .48mm.  If not, then adjust your extrusion multiplier accordingly until it is correct.

I had not calibrated for one of my rolls of filament and was pulling my hair out trying to figure out the banding problem I was having.  I could have sworn it was mechanical; but it turns out that over extruding will lay more plastic down then necessary and that causes excessive shrinkage as previous layers cool, then the process seems to repeat (my theory, anyway).  Ran the calibration as above and it went away!  It is also even more apparent with a denser infill.

SD2 - Stock - Enclosure - Heated Bed - Glass Plate - Auto Fire Extinguisher
Ord Bot Hadron - RAMPS 1.4 - Bulldog XL - E3D v6 - 10" x 10" PCB Heated Build w/SSR - Glass Plate
Thanks for All of Your Help!

17

Re: ABS Prints coming out with horizontal lines/bumps

That sounds like an excellent plan, will definitely give this a try. Thanks for your help!