Greetings all;

I got eddycated today.

I am  merging this drive code into 1 master, with intentions of removeing
quite a few of the variables that are at the end of the show, identical,

But not just yet, a far more pressing problem rared up and bit me, I had
just merged the module innerspline(), and had basically rewritten it
based on what I've learned about openscad in the last week, greatly
simplifying this particular paragrahp of code. So I set mode=6 and
rendered it, then sent the .stl to cura for a hard copy, Looked great in
openscad, and in cura, but the printer made a huge mess of it,
retractions for every pass over a tooth, all sorts of stray plastic it
took me half an hour to clean up each copy I printed but even then it
was so rough internally that any dimension corrections were at best a
SWAG. The result was full height, so I was like an hour twigging on the
fact the openscad's rendition was centered on z=0, with 6mm below, and
6mm above. So I added a couple translates and put it all on the 0-12
range of Z.  And sent that to cura as the usual .stl.

I lost 30 minutes out of 3 hours rendering time and the printer is now
behaving itself again.

Lesson learned? Never ever send cura a negative z.
I hope this is helpful to others..

Cheers, Gene Heskett

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.

• Louis D. Brandeis
  Genes Web page http://geneslinuxbox.net:6309/gene

Some versions of cura are broken. Recently, about two weeks ago, I gave
up on cura, and went back to superslicer in order to get a print of an
object with relatively thin walls. I'm not saying superslicer is any
better in every case, because for some reason (maybe it was tree
supports) I had gone back to cura a few months previously. You can set
the object any height you want above or below the bed, but you have to
select that feature. By default, it will place it on top of the build
plate, with lowest point of object on the surface of said plate, unless
the software is doing something it is not designed to do, or you don't
know how to use it. It is very easy to not notice that you are slicing
for, say petg, when you mean it to be for pla, and if you use 'stock
settings', and/or don't do the tests to set up the machine with the
actual filament spool you are trying to use at that time, you will often
get a mess of spaghetti.

On 02/07/2021 03:01, Gene Heskett wrote:
Greetings all;

I got eddycated today.