cura screw up?
Back again, new printer yadda yadda;
I have this .scad file:
...
// new example, low ratio harmonic drive floating splined belt.
// s/b 30/1 when finished. Amateur at work.
// 12 mm height before scale, no effect below
// size of tooth, all in mm's, no effect below
teeth = 60; // define number of teeth
arcx = ( 360 / teeth ); // arc of circle per tooth
$fr = 0.000000;
toothdia = (5.9*arcx);
max=53.55;// curiosity
min=49.50;// ditto
total=min+max;//ditto
toothcirc=(total / 3.76);// sets tooth circle at center with tooth
//overlap at base
height=12; // mm's
echo (14, teeth, arcx, toothdia, toothcirc, $fr) ; // echo? yes, once
union() {
difference() { // inside smoother
cylinder(d=53.60, h=12, $fn=90,center=true);//overlap isn't fussy
cylinder(d=52.70, h=12, $fn=360,center=true);// but inner face is
}
// for 6 we'll get 60 teeth
for($fr=[ 0: 6 : 359 ]){
rotate([0, 0, $fr]) // works, finally
translate([toothcirc, 0, 0]) // mv x=[$lr + $r1] y,z=0
scale(v= [.100, .100, 1.00]) // might use a small diferential
// here to improve tooth fit by changing the angle.
cylinder(d=toothdia, h=height, $fn=3, center=true); // make
//thick triangle
}
};
...
looks great in openscad preview. Give or take a fraction of a mm for
perfect fit. But export the .stl into cura, and its fubared on the
build plate.
cura, in additiion to a ton of stringing, and uncounted retractions is
inserting an extra somewhat loose inside layer for about 1/8 of the
circle that is only attached at the joint location of the tooth base
overlap. I have broken 3 of these trying to cut the stringing and this
extra stuff away.
So, what am I doing wrong that confuses cura?
Thanks all.
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
Gene Heskett wrote
So, what am I doing wrong that confuses cura?
The cynic in me says "using it".
I don't, so I can't test, but you might want to try changing the inner
cylinder to a height of 13, and the cylinder to a height of height-.005.
A preview (F5) will show you why.
Try that on Cura.
--
Sent from: http://forum.openscad.org/
Annotated screenshot shows both your original and increasing h to 13 in line
19. Made OpenSCAD preview much cleaner, but can't see any significant
difference in Cura?
http://forum.openscad.org/file/t3184/Gears-Gene-Cura-Both.jpg
Or higher res here:
https://www.dropbox.com/s/qi8xc3v6yo0ee7q/Gears-Gene-Cura-Both.jpg?raw=1
https://www.dropbox.com/s/qi8xc3v6yo0ee7q/Gears-Gene-Cura-Both.jpg?raw=1
P.S. I've heard of two cases where Gmail decides my images are spam. Would
appreciate feedback of any other cases please, to help me isolate cause.
Terry
--
Sent from: http://forum.openscad.org/
Re spam issue ... is it that it's deciding that there is too much skin tone and therefore "porn" ??
At one place I worked they had such a porn filter - the problem was that marketing (bless their cotton socks) made a point of highlighting business news by sending out scans of cuttings of the Financial Times that tripped the porn filter every time! (the paper used was pink - not sure if still is).
Dave
On 19/06/2021 16:24, Terrypin wrote:
Annotated screenshot shows both your original and increasing h to 13 in line 19. Made OpenSCAD preview much cleaner, but can't see any significant difference in Cura?
Or higher res here:
https://www.dropbox.com/s/qi8xc3v6yo0ee7q/Gears-Gene-Cura-Both.jpg?raw=1P.S. I've heard of two cases where Gmail decides my images are spam. Would appreciate feedback of any other cases please, to help me isolate cause.
Terry
Sent from the OpenSCAD mailing list archive at Nabble.com.
<pre class="moz-quote-pre" wrap="">_______________________________________________ OpenSCAD mailing list To unsubscribe send an email to <a class="moz-txt-link-abbreviated" href="mailto:discuss-leave@lists.openscad.org">discuss-leave@lists.openscad.org</a>
On Saturday 19 June 2021 10:28:16 lar3ry wrote:
Gene Heskett wrote
So, what am I doing wrong that confuses cura?
The cynic in me says "using it".
Is there a better one that can still drive the printer over usb? This is
a linux only farm. And this is the appimage version of cura 4.9.1.
Among other bitches, it can't see a filename over 16 characters.
I don't, so I can't test,
What do you use?
but you might want to try changing the inner
cylinder to a height of 13, and the cylinder to a height of
height-.005.
A preview (F5) will show you why.
F5 shows trash all over, doesn't say why, f6 restores the rendered
preview.
Your changes fixed f5, but not cura. The first layer put down still shows
the error. And its continueing layer by layer, up to about 10 layers
now. And I am about to see if a ruby nozzle and carbon fiber PETG will
survive cleaning it up. PLA literally falls apart. No flexibility, and
this part WILL be flexed, about 2mm in a 52mm circle. The armature that
rotates inside it and drives it thru ball bearings is eliptical by 2mm.
So this toothed belt and the outer bearing races are subject to being
flexed in and out about a mm each way, at up to 2000 rpms.
Try that on Cura.
I edited the .scad to translate([0,0,6]) it all to be at or above the
plate, then found I was using the "CR-10S" driver when its a "CR-10S pro
V2", but V2 hasn't made it into cura yet so had to settle for a "CR-10S
Pro".
And I think it may be fixed. 2.5 hours will tell the tale. ;o)
But I expect to have switch to a carbon fiber filament for this part in
the long run. Might even have to buy a ruby nozzle smaller than the
default .4mm. That tale has yet to be written.
Thanks Lar3ry.
--
Sent from: http://forum.openscad.org/
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
On Saturday 19 June 2021 11:24:23 Terrypin wrote:
Annotated screenshot shows both your original and increasing h to 13
in line 19. Made OpenSCAD preview much cleaner, but can't see any
significant difference in Cura?
http://forum.openscad.org/file/t3184/Gears-Gene-Cura-Both.jpg
Or higher res here:
https://www.dropbox.com/s/qi8xc3v6yo0ee7q/Gears-Gene-Cura-Both.jpg?raw
=1
<https://www.dropbox.com/s/qi8xc3v6yo0ee7q/Gears-Gene-Cura-Both.jpg?ra
w=1>
P.S. I've heard of two cases where Gmail decides my images are spam.
Would appreciate feedback of any other cases please, to help me
isolate cause.
Terry
See my other post, Terrypin. I think its fixed, the problem never was
visible even in curas previews, only showing up on the build plate. It
was a combo of the wrong driver, and an stl that was vertically centered
with 6mm below the plate and 6mm above.
Now all I am getting to clean up is lots of stringing across the open
spaces. That will be much easier to clean up. Now if its the correct
size. That will take another 2 hours to define.
Thank you a lot for your efforts.
--
Sent from: http://forum.openscad.org/
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
Gene Heskett wrote
So, what am I doing wrong that confuses cura?
The cynic in me says "using it".
Is there a better one that can still drive the printer over usb? This is
a linux only farm. And this is the appimage version of cura 4.9.1.
Among other bitches, it can't see a filename over 16 characters.
I don't, so I can't test,
What do you use?
Before I switched my main PC to Linux, and before I started using Octopi on
a Pi 3, I used slic3r and later, Prusa Slicer for slicing, and Repetier-Host
for controlling the printer. I tried using Cura early in my 3D experience,
back in 2014, and it was absolutely horrible. I see that it has improved a
lot, but I am used to the other ones now.
Now I use the same slicers, but run a Pi 3B. It controls the printer over
USB, and I can access it from a browser on either my Windows or Linux PC. I
also run Klipper on it, and I may be trying a few other Klipper-like
interfaces that look promising.
So I can send sliced gcode files by drag'n'drop using my browser, do all the
printer setup, and start the print. I can watch it from my tablet if I am
upstairs.
I highly recommend Octopi.
but you might want to try changing the inner
cylinder to a height of 13, and the cylinder to a height of
height-.005.
A preview (F5) will show you why.
F5 shows trash all over, doesn't say why, f6 restores the rendered
preview.
The reason it shows trash is that when you preview, any surfaces that are
the the same, like the outer cylinder and inner cylinder being exactly the
same height, create the sort of shimmering you see. The difference will
still work, but making the height very slightly different solves the visual
problem
Your changes fixed f5, but not cura. The first layer put down still shows
the error. And its continueing layer by layer, up to about 10 layers
now. And I am about to see if a ruby nozzle and carbon fiber PETG will
survive cleaning it up. PLA literally falls apart. No flexibility, and
this part WILL be flexed, about 2mm in a 52mm circle. The armature that
rotates inside it and drives it thru ball bearings is eliptical by 2mm.
So this toothed belt and the outer bearing races are subject to being
flexed in and out about a mm each way, at up to 2000 rpms.
Frankly, I think your problem may be entirely in the printer setup.
Temperature, especially on the first layer. Filament feed rate. A partial
clog will also cause problems that look like weak prints, as the filament is
thinner than it should be.
Does the filled-in first layer look like a proper layer, or is it very thin.
If very thin, it could be stringing.
Try that on Cura.
I edited the .scad to translate([0,0,6]) it all to be at or above the
plate, then found I was using the "CR-10S" driver when its a "CR-10S pro
V2", but V2 hasn't made it into cura yet so had to settle for a "CR-10S
Pro".
And I think it may be fixed. 2.5 hours will tell the tale. ;o)
But I expect to have switch to a carbon fiber filament for this part in
the long run. Might even have to buy a ruby nozzle smaller than the
default .4mm. That tale has yet to be written.
Good luck, Gene.
--
Sent from: http://forum.openscad.org/
On Saturday 19 June 2021 12:15:03 Dave wrote:
Re spam issue ... is it that it's deciding that there is too much skin
tone and therefore "porn" ?? At one place I worked they had such a
porn filter - the problem was that marketing (bless their cotton
socks) made a point of highlighting business news by sending out scans
of cuttings of the Financial Times that tripped the porn filter every
time! (the paper used was pink - not sure if still is).
Dave
gmail's filtration, or failures thereof, is subject to lots of durogatory
discussion. Unfortunately its everyplace on the web EXCEPT on their
support pages. It is not open for discussion there. I tried it, years
ago, but soon voted with my wallet. My ISP did too, setting up their
own mail server on a linux box using dovecot. Best thing I can say is it
Just Works. I think thats is what it is supposed to do. :o)
On 19/06/2021 16:24, Terrypin wrote:
Annotated screenshot shows both your original and increasing h to 13
in line 19. Made OpenSCAD preview much cleaner, but can't see any
significant difference in Cura?
Or higher res here:
https://www.dropbox.com/s/qi8xc3v6yo0ee7q/Gears-Gene-Cura-Both.jpg?raw
=1
P.S. I've heard of two cases where Gmail decides my images are spam.
Would appreciate feedback of any other cases please, to help me
isolate cause.
Terry
Sent from the OpenSCAD mailing list archive at Nabble.com.
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
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
Gene Heskett wrote
See my other post, Terrypin. I think its fixed, the problem never was
visible even in curas previews, only showing up on the build plate. It
was a combo of the wrong driver, and an stl that was vertically centered
with 6mm below the plate and 6mm above.
Check to see if Cura has a "Lie flat" button. Slic3r and Prusa Slicer both
have it. That way, it doesn't matter where the stl thinks it is vertically,
or even it it's tilted. It will plop it down to Z=0, and show you what
corrections it made when you look at the 'Rotate" setting.
--
Sent from: http://forum.openscad.org/
On Saturday 19 June 2021 13:26:50 lar3ry wrote:
Gene Heskett wrote
So, what am I doing wrong that confuses cura?
The cynic in me says "using it".
Is there a better one that can still drive the printer over usb?
This is a linux only farm. And this is the appimage version of cura
4.9.1. Among other bitches, it can't see a filename over 16
characters.
I don't, so I can't test,
What do you use?
Before I switched my main PC to Linux, and before I started using
Octopi on a Pi 3, I used slic3r and later, Prusa Slicer for slicing,
and Repetier-Host for controlling the printer. I tried using Cura
early in my 3D experience, back in 2014, and it was absolutely
horrible. I see that it has improved a lot, but I am used to the other
ones now.
Now I use the same slicers, but run a Pi 3B. It controls the printer
over USB, and I can access it from a browser on either my Windows or
Linux PC. I also run Klipper on it, and I may be trying a few other
Klipper-like interfaces that look promising.
So I can send sliced gcode files by drag'n'drop using my browser, do
all the printer setup, and start the print. I can watch it from my
tablet if I am upstairs.
I highly recommend Octopi.
but you might want to try changing the inner
cylinder to a height of 13, and the cylinder to a height of
height-.005.
A preview (F5) will show you why.
F5 shows trash all over, doesn't say why, f6 restores the rendered
preview.
The reason it shows trash is that when you preview, any surfaces that
are the the same, like the outer cylinder and inner cylinder being
exactly the same height, create the sort of shimmering you see. The
difference will still work, but making the height very slightly
different solves the visual problem
Your changes fixed f5, but not cura. The first layer put down still
shows the error. And its continueing layer by layer, up to about 10
layers now. And I am about to see if a ruby nozzle and carbon fiber
PETG will survive cleaning it up. PLA literally falls apart. No
flexibility, and this part WILL be flexed, about 2mm in a 52mm
circle. The armature that rotates inside it and drives it thru ball
bearings is eliptical by 2mm. So this toothed belt and the outer
bearing races are subject to being flexed in and out about a mm each
way, at up to 2000 rpms.
Frankly, I think your problem may be entirely in the printer setup.
Temperature, especially on the first layer. Filament feed rate. A
partial clog will also cause problems that look like weak prints, as
the filament is thinner than it should be.
Does the filled-in first layer look like a proper layer, or is it very
thin. If very thin, it could be stringing.
This printer, a Creality CR-10S Pro V2, has BLTouch, samples a 5x5 matrix
all over the bed. I spent 3 or 4 hours yesterday fine tuning that so the
autotune didn't have more than 1/2 a mm to correct, and if you add a
printer that has that, it runs thru that to refresh that mapping before
it does the first print. So bed leveling is pretty good. And it sticks
hard, making you let it cool before trying to lift the print. The 1st
layer looks good, and it just keeps on truckin now that I'm closer to
the correct driver.
Except for the stringing, this print in progress looks (queue the Tony
the tiger voice) great.
Try that on Cura.
I edited the .scad to translate([0,0,6]) it all to be at or above
the plate, then found I was using the "CR-10S" driver when its a
"CR-10S pro V2", but V2 hasn't made it into cura yet so had to
settle for a "CR-10S Pro".
And I think it may be fixed. 2.5 hours will tell the tale. ;o)
But I expect to have switch to a carbon fiber filament for this part
in the long run. Might even have to buy a ruby nozzle smaller than
the default .4mm. That tale has yet to be written.
Good luck, Gene.
Thank you.
--
Sent from: http://forum.openscad.org/
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