Re: [Emc-users] filament feed, was Re: Machinekit LinuxCNC-on-BeagleBone Beta Release
On 06/16/2013 01:24 PM, Gene Heskett wrote: Coyote being the handle I'd been using since about 1962. Ah, now, were you kye-OH-tee or COY-ote? I have an amateur radio in the van, but discovered I don't have enough brainpower to drive and talk at the same time. Heck, I can barely drive and *listen* at the same time. -- Ed softsolder.com -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] filament feed, was Re: Machinekit LinuxCNC-on-BeagleBone Beta Release
On Monday 17 June 2013 08:50:44 Ed Nisley did opine: On 06/16/2013 01:24 PM, Gene Heskett wrote: Coyote being the handle I'd been using since about 1962. Ah, now, were you kye-OH-tee or COY-ote? I pronounced it like we did in the S.D. hills, Ky-yot with a long o. I have an amateur radio in the van, but discovered I don't have enough brainpower to drive and talk at the same time. Heck, I can barely drive and *listen* at the same time. That wasn't a huge problem for me, and if I replaced the mike with one of the shacks $12 electret pencils, very little distraction. The std mikes you have to palm and squeeze were far more work. I could park the end of the pencil on the point of my chin it went where ever my head was looking. And it sounded better by far. As my hearing fades, a cell phone is 100's of time more distraction because an eighth of an inch misplaced on your ear puts the thing they call a speaker out of reach of my hearing, a huge distraction. If it rings when I'm driving, I never even reach for it. They can leave a voice mail or hang up. Since 99.9% of the time, its the DW, wondering whats keeping me when I went out for din-din, 90% of the time I just let the voice mails expire of old age. I carry that thing for in case the vehicle decides it won't go, I can yell for help. Haven't had to in the years since I retired, but... My 99 GMC is pretty rusted out these days, I bought it with 55k miles on it, looked show room new then, made it to 113k miles before it filled the pan with several gallons of antifreeze, so I put a rebuilt long block in it last year, about $2600, but its still running on the same fresh tires that were on it then. But they are about done now, so I'll either trade up, or spend another 2G's for another set like those if I can find them. IMO, 60k+ miles on a set of tires that have never even been rotated, on a 4WD vehicle is phenomenally good, but they'll hydroplane in a downpour if I don't pay attention. Since the Toy is 4wd too, I'll probably trade up, for a long box topper regular cab 2wd. The king cab is nice for keeping stuff dry, but isn't an adult sized body hauler, which I don't need, and the short box is a PIMA when hauling construction stuff. Today, my living doesn't depend on going when most folks would hibernate, I can't really justify the 4wd. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! My views http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml You scratch my tape, and I'll scratch yours. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] filament feed, was Re: Machinekit LinuxCNC-on-BeagleBone Beta Release
On 6/16/2013 6:57 AM, Ed Nisley wrote: On 06/16/2013 04:24 AM, Erik Christiansen wrote: current printer implementations just drag the spool with the filament feed capstan It's brutally simple: the filament drive hauls filament through a flexible tube that arches between a holder at the spool and the extruder, so the drive must overcome the tension required to unroll the spool plus the friction required to drag the filament: http://softsolder.com/2013/04/24/makergear-m2-filament-guide-tube-friction/ Great blog. I like your 'voice'. Bowden drives put the feed at the spool end of the guide tube, which makes retraction less effective. a couple of microswitches The gotcha is that the filament loop thrashes around as the extruder head zips back and forth. On the M2, that's only along the X axis, but printers like the Ultimaker and Replicator move the extruder along both X and Y. I'm not sure where the sensor would be happiest, because you don't want to constrain the loop motion too much: pinning it to a board at the top of the arch might be too confining. Two thoughts (based on zero run-time experience with my own almost but never quite ready for prime time 3D printer). -Does relocating the filament spool above the printer to straighten out the filament path help? I notice some people do this and others don't. -Before vacuum-base tape-handling systems came into common usage, spring-loaded idler arms possibly with micro limit switches were used to advantage in tape decks. Have you given any consideration to such in your efforts? Regards, Kent -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] filament feed, was Re: Machinekit LinuxCNC-on-BeagleBone Beta Release
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 6/16/2013 7:02 AM, Kent A. Reed wrote: -Does relocating the filament spool above the printer to straighten out the filament path help? I notice some people do this and others don't. Yes. I was going to post the feed tube was not brutally simple. Brutally simple is the feed system I use on my MendelMax: Spools mounted above the printer, without so much as a guide hook (the rectangular opening at the top of the frame serves as a crude guide, I guess). The brackets were printed, and the PVC tube is the re-purposed shipping container for the linear rods and Z axis lead screws. This has worked well for me so far, but I also don't do overnight unattended prints (about four hours is my longest print so far). I realized I don't have any good wide shots in my videos, so I posted a still on G+: https://plus.google.com/u/0/106079792142766516843/posts/K5FBQmwN19v - -- Charles Steinkuehler char...@steinkuehler.net -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlG90JQACgkQLywbqEHdNFwc7wCgutctwrZ9uFS0F733SBr6x+I2 YFkAoPvh8+xEAWcee5BTwwCbrOqkNDUQ =3J2n -END PGP SIGNATURE- -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] filament feed, was Re: Machinekit LinuxCNC-on-BeagleBone Beta Release
On 06/16/2013 08:02 AM, Kent A. Reed wrote: relocating the filament spool above the printer The ones I've seen align the spool axis with Y axis, with the filament unrolling from the top toward the center of the printer along the X axis. I think that's a good non-powered approach that shouldn't change the printer's balance too much; rotating the entire spool with a motor might be feasible. spring-loaded idler arms I must puzzle over the normal filament motion, probably after relocating the spool, to see how much it would thrash switches or wobbulate arms or defocus images. I'd prefer to have the whole problem Go Away in the simplest possible manner... and rearranging the mechanics might just be the ticket. I like your 'voice'. Long ago, a Circuit Cellar editor told me I had one of the strongest writing voices he'd ever read. It wasn't clear that was a Good Thing, but I'm stuck with it. [grin] -- Ed softsolder.com -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] filament feed, was Re: Machinekit LinuxCNC-on-BeagleBone Beta Release
On Sunday 16 June 2013 12:58:45 Ed Nisley did opine: On 06/16/2013 08:02 AM, Kent A. Reed wrote: relocating the filament spool above the printer The ones I've seen align the spool axis with Y axis, with the filament unrolling from the top toward the center of the printer along the X axis. I think that's a good non-powered approach that shouldn't change the printer's balance too much; rotating the entire spool with a motor might be feasible. spring-loaded idler arms I must puzzle over the normal filament motion, probably after relocating the spool, to see how much it would thrash switches or wobbulate arms or defocus images. I'd prefer to have the whole problem Go Away in the simplest possible manner... and rearranging the mechanics might just be the ticket. I like your 'voice'. Long ago, a Circuit Cellar editor told me I had one of the strongest writing voices he'd ever read. It wasn't clear that was a Good Thing, but I'm stuck with it. [grin] Chuckle. + VBG. Story time Ed: During the early to later 70's, in addition to my duties as tx supervisor at KXNE-TV for the Nebraska ETC Commission, I was quite active on the CB radio in northeast Nebraska, and the bench tech servicing most of them at Norfolk 2-Way Radio. Then in late 77 I moved to the CE position at a small station in New Mexico, basically bumming around following my woman, 2 years here, 2 years there, till she left in '86, but I'd found my place by then as CE at WDTV-5 here in West Virginia, where I finished out my time took the Rolex home in 2002. Getting me an old maid school teacher in 89, we were on vacation in 95, basically touring the places I had lived over the last 50 years. I'd put a CB in the van we were driving to help keep track of the traffic, and while driving through Norfolk NE enroute to Carrol NE my mothers stone, I picked up the mike and said Breaker one-nine. You have got to know your voice is truly unforgettable when 4 of the old timers echo'd back with go coyote, where ya been?. Coyote being the handle I'd been using since about 1962. So I had to pull over chat till traffic from the kiddie pool got out of hand, 10 minutes or so. No respect for their elders, and 90% of their vocabulary is 4 letter words. :( That radio has been in the closet for almost 20 years now. I don't miss it a bit. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! My views http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml Thrashing is just virtual crashing. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
