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Missing spot

Posted: October 31st, 2016, 9:24 pm
by LePaul
I wonder why this print on my UMO keeps missing this one lone spot.
IMG_4592.JPG

Re: Missing spot

Posted: November 1st, 2016, 2:48 am
by Dim3nsioneer
Seems to me to be a combination of back lash and slight underextrusion. Check the overlap settings of your slicer. Cura?

Re: Missing spot

Posted: November 1st, 2016, 9:02 am
by LePaul
Yeah Cura 2.3.0
Default settings minus the retraction length, speed, print head temp and bed temp

Re: Missing spot

Posted: November 1st, 2016, 10:27 am
by LePaul
Here what it is, by default in Cura 2.3.0

Again, interesting that it was only that one spot
overlap.JPG
overlap.JPG (15.69 KiB) Viewed 19485 times

Re: Missing spot

Posted: November 1st, 2016, 3:14 pm
by Dim3nsioneer
No coasting, right?

Re: Missing spot

Posted: November 1st, 2016, 3:22 pm
by Neotko
Just to be sure. Can you check that x/y shafts (the thin ones that move the head) are perfectly square? Just in case.

Re: Missing spot

Posted: November 1st, 2016, 3:30 pm
by LePaul
Coasting was on

Re: Missing spot

Posted: November 2nd, 2016, 10:18 am
by Dim3nsioneer
And was this a coasting spot?

Re: Missing spot

Posted: November 2nd, 2016, 10:24 am
by LePaul
How would I determine that? Is that the green color?

Here's a layer 1 screenshot with coasting on
rib.JPG

Re: Missing spot

Posted: November 2nd, 2016, 5:48 pm
by Dim3nsioneer
Repetier host and gcode.ws show the difference between print and travel moves.

Re: Missing spot

Posted: November 2nd, 2016, 10:39 pm
by LePaul
Well I have no idea what those programs are...so I remain stumped :)

Re: Missing spot

Posted: November 3rd, 2016, 1:58 am
by Dim3nsioneer
LePaul wrote:Well I have no idea what those programs are...so I remain stumped :)
Oh, yes, my bad. They are gcode viewers:
https://www.repetier.com/
http://gcode.ws/

If only someone could invent something like a search engine for the internet... :mrgreen:

Re: Missing spot

Posted: November 3rd, 2016, 2:30 am
by drayson
... or a search engine for gcode - a possibility to just view travel or print moves could help too... maybe as a plugin? ;-)

Re: Missing spot

Posted: November 3rd, 2016, 3:14 am
by MTVDNA
You can also open gcode files with Simplify3D. The view will probably not work with feature types but at least you should be able to see the difference between travel moves and regular moves if you set the coloring to movement speed.

In my experience the interface of S3D is much nicer to work with than repetier host, and gcode.ws runs really slowly in comparison.

Re: Missing spot

Posted: November 3rd, 2016, 3:15 am
by Neotko
You could just use your s3d to see the gcode. Coasting shows as no green and just travel move.