Note variable jagged edges on the conrod and variable thickness piston rings. It would be nice to be able to print (onto paper) directly from OpenSCAD rather than via a screenshot. Enjoy!

On 10/31/25 00:36, Caddiy via Discuss wrote: > Note variable jagged edges on the conrod and variable thickness piston rings. > > It would be nice to be able to print (onto paper) directly from OpenSCAD rather than via a screenshot. > > Enjoy! These are all artifacts of the screen capture, the con rod is moving in the time it takes for one screen capture, makes the rings flicker between screen lines too. > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org Cheers, Gene Heskett, CET. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Don't poison our oceans, interdict drugs at the src.

gene heskett wrote: > These are all artifacts of the screen capture, the con rod is moving in the time it takes for one screen capture, makes the rings flicker between screen lines too. > > > --- > > > > OpenSCAD mailing list > > To unsubscribe send an email to discuss-leave@lists.openscad.org > > ## Cheers, Gene Heskett, CET. > > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > \-Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > > * Louis D. Brandeis > Don't poison our oceans, interdict drugs at the src. Yes. Aren’t we lucky that we don’t have to print text documents, photos etc. from screenshots.

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Louis D. Brandeis Don't poison our oceans, interdict drugs at the src.

I think long ago it was possible to get an anti-aliased screen view if your graphics card supported it but it got disabled in OpenSCAD. On Fri, 31 Oct 2025, 07:21 Caddiy via Discuss, <discuss@lists.openscad.org> wrote: > gene heskett wrote: > > These are all artifacts of the screen capture, the con rod is moving in > the time it takes for one screen capture, makes the rings flicker between > screen lines too. > > ------------------------------ > > OpenSCAD mailing list To unsubscribe send an email to > discuss-leave@lists.openscad.org > > Cheers, Gene Heskett, CET. > > "There are four boxes to be used in defense of liberty: soap, ballot, > jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > > - > > Louis D. Brandeis Don't poison our oceans, interdict drugs at the src. > > Yes. > > Aren’t we lucky that we don’t have to print text documents, photos etc. > from screenshots. > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

On 10/30/2025 9:35 PM, Caddiy via Discuss wrote: > > Note variable jagged edges on the conrod and variable thickness piston > rings. > > It would be nice to be able to print (onto paper) directly from > OpenSCAD rather than via a screenshot. > > Enjoy! > Cool animation! Can you share the underlying .SCAD program privately?  I'll see what I can think of in terms of creating higher-resolution images from it. (One simple possibility would be to turn it on its side and run OpenSCAD at max size on my 7680x2160 display; that should yield about 5x the resolution.  But that's not really a general answer.) Generating the images from the command line seems viable, but if you're not familiar with using the Command Prompt tool there would be a bit of a learning curve. > Aren’t we lucky that we don’t have to print text documents, photos > etc. from screenshots. > Indeed.  Remind me:  how do you create 3D models from a word processor or photo gallery? There are different tools for different purposes.  OpenSCAD is for creating 3D models... not for creating images of them.  It's able to create images of them almost as a by-product of doing its primary job.

On 10/31/25 03:22, Caddiy via Discuss wrote: > gene heskett wrote: > >> These are all artifacts of the screen capture, the con rod is moving in the time it takes for one screen capture, makes the rings flicker between screen lines too. >> >>> --- >>> >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >> ## Cheers, Gene Heskett, CET. >> >> "There are four boxes to be used in defense of liberty: >> soap, ballot, jury, and ammo. Please use in that order." >> \-Ed Howdershelt (Author, 1940) >> If we desire respect for the law, we must first make the law respectable. >> >> * Louis D. Brandeis >> Don't poison our oceans, interdict drugs at the src. > Yes. > > Aren’t we lucky that we don’t have to print text documents, photos etc. from screenshots. We can, but rarely are they good enough to even show to the next of kin. Its a horrible idea, compressing your artistry into a screenshot, limited by the resolution of the screen.  Its even a bad idea to 3d print. I don't make movies because of that.  Thermal 3d prints aren't that good either, the std .4mm nozzle is the limiting factor, but the speed loss of a smaller nozzle is painful. With current popular motor tech, the speed limit is the motors ability to not loose steps, also known as layer shift. Dropping to a .2mm nozzle multiply's the time by 4.  Higher yet if the layer thickness is also reduced. A penalty few are willing to pay including me. I generally replace the plain X/Y steppers of my printers with stepper/servo's running on much higher voltages if the printer will accommodate the stepper/servo's extra length because of the motors built in encoder, whose output goes only to the intelligent driver. That gives higher accuracy of motion, and faster response to errors since these new drivers, generally from Hanpose, can use up to 90 volts to overcome the motor inductance and achieve much higher speeds w/o errors. Then the speed limit becomes how fast the hot end can melt the plastic, even my own designs there peter out at less than 20mm of filament melted per second. Higher bed & nozzle temps expand the range of usable plastics. Higher wattages of heaters than the 60 watter I use are available but incompatible with the extruder assembly I've found to be a clog proof combo.  At this level, the printer is 10x faster than it was OOTB.  And does a much more accurate reproduction of my designs in any plastic including polycarbonate.  But that $550 printer now has about $2500 worth of mods. I have about half of my cnc machines in the garage converted to these motors in an earlier 50 volt version. They do beautiful work, 2 to 3x faster. I make my own rotary tables, as the 4th axis on my milling machines. They run sub arc/minute accurate, at 600 revs.  These drivers are smart, using only enough motor current to cancel the error. You can see that in the electric bill.  Motors don't run burn your hand hot at normal working speeds. Yeah, they cost money, but its worth it. > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org Cheers, Gene Heskett, CET. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Don't poison our oceans, interdict drugs at the src.

Jordan Brown wrote: > Cool animation! > > Can you share the underlying .SCAD program privately?  I'll see what I > can think of in terms of creating higher-resolution images from it. The up and down is done with trig and the side to side turned out to be a simple pendulum motion, as I had hoped. The spark is done with intersection(). The whole thing is in 6 layers. I think I have your private e-mail somewhere. > (One simple possibility would be to turn it on its side and run OpenSCAD > at max size on my 7680x2160 display; that should yield about 5x the > resolution.  But that's not really a general answer.) It’s not perfect, but still a big improvement - see image below. If it is copied into text document, it can be reduced in size and will look even better. I have also uploaded the corresponding animation, but at 1.4 MB it probably won’t be accepted. > Generating the images from the command line seems viable, but if you're > not familiar with using the Command Prompt tool there would be a bit of > a learning curve. I have never used the command line. I can’t even get started because someone has decided that I should use Bing instead, and everything I enter just starts a search in Bing. I had a look at Inkscape, it’s very good, but not quite what I need.

3D printing seems to be quite a science! I have often wondered whether it would be possible to make some of my designs in 3D, but I wonder if it is possible to get adequate resolution for bearings and other moving parts, and how to ensure they do not stick or sieze up completely? There is a maker space with 3D printers in the next big town that should be worth a visit.

gene heskett wrote: > On 10/31/25 03:22, Caddiy via Discuss wrote: > > > gene heskett wrote: > > > > > These are all artifacts of the screen capture, the con rod is moving in the time it takes for one screen capture, makes the rings flicker between screen lines too. > > > > > > > --- > > > > > > > > OpenSCAD mailing list > > > > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > > > > ## Cheers, Gene Heskett, CET. > > > > > > "There are four boxes to be used in defense of liberty: > > > soap, ballot, jury, and ammo. Please use in that order." > > > \-Ed Howdershelt (Author, 1940) > > > If we desire respect for the law, we must first make the law respectable. > > > > > > * Louis D. Brandeis > > > Don't poison our oceans, interdict drugs at the src. > > > Yes. > > > > Aren’t we lucky that we don’t have to print text documents, photos etc. from screenshots. > > We can, but rarely are they good enough to even show to the next of kin. > > Its a horrible idea, compressing your artistry into a screenshot, > > limited by the resolution of the screen.  Its even a bad idea to 3d > > print. I don't make movies because of that.  Thermal 3d prints aren't > > that good either, the std .4mm nozzle is the limiting factor, but the > > speed loss of a smaller nozzle is painful. With current popular motor > > tech, the speed limit is the motors ability to not loose steps, also > > known as layer shift. Dropping to a .2mm nozzle multiply's the time by > > 4\.  Higher yet if the layer thickness is also reduced. A penalty few are > > willing to pay including me. > > I generally replace the plain X/Y steppers of my printers with > stepper/servo's running on much higher voltages if the printer will > accommodate the stepper/servo's extra length because of the motors built > in encoder, whose output goes only to the intelligent driver. That gives > higher accuracy of motion, and faster response to errors since these new > drivers, generally from Hanpose, can use up to 90 volts to overcome the > motor inductance and achieve much higher speeds w/o errors. Then the > speed limit becomes how fast the hot end can melt the plastic, even my > own designs there peter out at less than 20mm of filament melted per > second. Higher bed & nozzle temps expand the range of usable plastics. > Higher wattages of heaters than the 60 watter I use are available but > incompatible with the extruder assembly I've found to be a clog proof > combo.  At this level, the printer is 10x faster than it was OOTB.  And > does a much more accurate reproduction of my designs in any plastic > including polycarbonate.  But that $550 printer now has about $2500 > worth of mods. I have about half of my cnc machines in the garage > converted to these motors in an earlier 50 volt version. They do > beautiful work, 2 to 3x faster. > > I make my own rotary tables, as the 4th axis on my milling machines. > They run sub arc/minute accurate, at 600 revs.  These drivers are smart, > using only enough motor current to cancel the error. You can see that in > the electric bill.  Motors don't run burn your hand hot at normal > working speeds. Yeah, they cost money, but its worth it. > > > --- > > > > OpenSCAD mailing list > > To unsubscribe send an email to discuss-leave@lists.openscad.org > > ## Cheers, Gene Heskett, CET. > > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > \-Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > > * Louis D. Brandeis > Don't poison our oceans, interdict drugs at the src. gene heskett wrote: > On 10/31/25 03:22, Caddiy via Discuss wrote: > > > gene heskett wrote: > > > > > These are all artifacts of the screen capture, the con rod is moving in the time it takes for one screen capture, makes the rings flicker between screen lines too. > > > > > > > --- > > > > > > > > OpenSCAD mailing list > > > > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > > > > ## Cheers, Gene Heskett, CET. > > > > > > "There are four boxes to be used in defense of liberty: > > > soap, ballot, jury, and ammo. Please use in that order." > > > \-Ed Howdershelt (Author, 1940) > > > If we desire respect for the law, we must first make the law respectable. > > > > > > * Louis D. Brandeis > > > Don't poison our oceans, interdict drugs at the src. > > > Yes. > > > > Aren’t we lucky that we don’t have to print text documents, photos etc. from screenshots. > > We can, but rarely are they good enough to even show to the next of kin. > > Its a horrible idea, compressing your artistry into a screenshot, > > limited by the resolution of the screen.  Its even a bad idea to 3d > > print. I don't make movies because of that.  Thermal 3d prints aren't > > that good either, the std .4mm nozzle is the limiting factor, but the > > speed loss of a smaller nozzle is painful. With current popular motor > > tech, the speed limit is the motors ability to not loose steps, also > > known as layer shift. Dropping to a .2mm nozzle multiply's the time by > > 4\.  Higher yet if the layer thickness is also reduced. A penalty few are > > willing to pay including me. > > I generally replace the plain X/Y steppers of my printers with > stepper/servo's running on much higher voltages if the printer will > accommodate the stepper/servo's extra length because of the motors built > in encoder, whose output goes only to the intelligent driver. That gives > higher accuracy of motion, and faster response to errors since these new > drivers, generally from Hanpose, can use up to 90 volts to overcome the > motor inductance and achieve much higher speeds w/o errors. Then the > speed limit becomes how fast the hot end can melt the plastic, even my > own designs there peter out at less than 20mm of filament melted per > second. Higher bed & nozzle temps expand the range of usable plastics. > Higher wattages of heaters than the 60 watter I use are available but > incompatible with the extruder assembly I've found to be a clog proof > combo.  At this level, the printer is 10x faster than it was OOTB.  And > does a much more accurate reproduction of my designs in any plastic > including polycarbonate.  But that $550 printer now has about $2500 > worth of mods. I have about half of my cnc machines in the garage > converted to these motors in an earlier 50 volt version. They do > beautiful work, 2 to 3x faster. > > I make my own rotary tables, as the 4th axis on my milling machines. > They run sub arc/minute accurate, at 600 revs.  These drivers are smart, > using only enough motor current to cancel the error. You can see that in > the electric bill.  Motors don't run burn your hand hot at normal > working speeds. Yeah, they cost money, but its worth it. > > > --- > > > > OpenSCAD mailing list > > To unsubscribe send an email to discuss-leave@lists.openscad.org > > ## Cheers, Gene Heskett, CET. > > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > \-Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > > * Louis D. Brandeis > Don't poison our oceans, interdict drugs at the src. 3D printing seems to be quite a science! I have often wondered whether it would be possible to make some of my designs in 3D, but I wonder if it is possible to get adequate resolution for bearings and other moving parts, and how to ensure they do not stick or sieze up completely? There is a maker space with 3D printers in the next big town that should be worth a visit.

Jordan Brown wrote: > Can you share the underlying .SCAD program privately?  I'll see what I > can think of in terms of creating higher-resolution images from it. Sorry, can’t find your address. Please send me an e-mail with the address to which you want me to send the program.