An Update on the DIY Glassblowing Lathe
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- čas přidán 6. 08. 2023
- This time we're talking about the lathe again. It may not look it, but we're close to finished. In fact, I'm already using it a little.
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You have stolen everything from Glasslinger. Give him credit.
I literally can't tell whether you're serious
bruh he legit said "this is from person X, this is from person Y, this is pieced together.
i dont even mind taking stuff from others, hes improving it after all, heck, id love if he took something from me and improved it, that way i dont have to work on it...
hes not even selling it.
Yeah that is true. But Glasslinger is a true legend 😀@@contomo5710
I put all my knowledge on the web for everyone to use free. I am glad I saved this guy a bit of trouble, even though he has created his own amount of trouble himself!
@@glasslinger Oh, I'm creating trouble alright. We'll see I can dig myself out! Thanks for making all of your knowledge free and open. I'm always excited to see a new video on your channel.
The amazing thing I see is your developing and solving stuck points that we all face in our minds before we even think about cutting materials. The PSA has limitations, some of which can be overcome by using more than a two bed system.
thank you for this.. i've got a seven year old daughter, and i love being able to show her cool diy projects.
Brilliant work my friend!! I just watched your oxi-kit video and wanted to check k out your glass lathe. Really incredible work. Thank you for sharing it. I am recovering from getting run over on my 1957 Harley but when I get back to work I will definitely contribute. I just have to get back on may feet again. By the way I am a chemical engineer and we should get together sometime..I have some really awesome stories from school that you might enjoy hearing and possibly recreating....lol
Damn, sorry to hear about your accident. I'm lucky enough to have my motorcycle crash ahead of me still.
@@SignalDitch I restored a 1957 Harley Panhead and I was working two hours from my house. I was pulling out of may driveway and Someone in a lifted F350 clipped my rear fender flipping me up and around a telephone pole and crushing my right leg nearly in two. It produced a 6 inch long blood clot that broke loose and went to my heart and lungs. I am still on blood thinners but I am back on my feet a little bit. We should still get together. If you are anything like me you will love to hear some of the things I have done as well as some things I would like to do again but it is always better to have four hands than two. My PhD is in organ-metal transition catalysis. Using metals to catalyze reactions.I used to go down to Southern Virgina to go ghost hunting with Virginia Paranormal Investigations. A couple hours is not that bad. do you have a Facebook page?
This is great! I have a student working on a "nano" scale glassblowing lathe. We are using a stepper motor and that exact same controller!
Great Video! I thought about building a glass blowing lathe for quite some time. I really like the first design of the three jaw chuck. I know you allready found a solution by using the collet chuck but maybe some omnidirectional bearings (I think they are also called ball transfer units) on the surface with creates the friction might be a solution for the first design. It could enable you to use larger diameter tube compared to the collet chuck.
A second stepper motor on the chuck at the opposite side would also be a great addition to let both chucks run in sync.
Anyway I'm sure you allready have a lot of ideas for the lathe and will be able to make everything work on your own :)
Can't wait for the next video!
Yeah, the first chuck design can definitely be made to work. Check out this video of the chuck that I based it on if you haven't yet:
czcams.com/video/_UF2CPnIqrc/video.html
As for a second stepper motor, I don't think I made it clear in the video that this is the second in a series. I talk about the design in the first video and a synchronized tailstock is definitely part of the plan, in fact the entire tailstock is identical to the headstock, just rotated 180.
Interesting work as always. Good luck on the oxygen concentrator
“A couple hundred rpm”
I sure hope not 😂❤
Dude this is really nice!
You should try to make a silicone collet, that way it would be heat resistant
Good stuff! Looking forward to the next update already!
I just found this series, and I eagerly await the next installment! I am especially intrigued by your ideas for miniaturization and integration of vacuum tube devices. Maybe one day you could re-create a device similar to a Nuvistor. :^)
Ha, ha, ha, ha! Have you ever cut open a nuvistor? :)
@@glasslingerNo, I haven't. I only know about them from the internet, and find them fascinating. I was reminded of them, because miniaturization of vacuum devices was brought up in an earlier episode. :)
But was this possibly a rhetorical question, I wonder? 🤔
PS: Did not expect a reply to this random comment after 4 months, and then from the legend themself 😅
Enjoyable vid as always
I knew you would use my Engineering Resin for something awesome!!
😮😮
Yes! It's been really great to work with
Dude! Just found your channel. Very cool work! I'll be sticking around for a while!
Apologies up front, since i have no experience turning glass, but can't imagine you are imparting more tool/forming stress than what happens with wood turning. I say that because presuming I'm correct, can't help but think some modifications to a longworth chuck design should should solve your interest in simple, and suspect it may be faster than your current chuck (although admittedly that is just with the rough idea I have in my head, and much would depend on the range of adjustment you would want/need). If you haven't looked at longworth chuck designs I think it may be worth your time to take a look.
You're completely right that the workpiece experiences very little force, especially on this scale. I'm familiar with the Longworth chuck, and I think it's a brilliant design, but the most important feature of the glass lathe might be that the spindle bore goes all the way through. I started to design a modified Longworth but that's what ended up becoming the "cone" chuck. I appreciate the suggestion!
@@SignalDitch no, no no, I absolutely appreciate the need for a bore through spindle, but there is not reason that the center can't be drilled for precisely that since there are just mounted direct to a faceplate. The thing that would also need some modification is the "bumper clamp thingie" (?!) either some sort of fixed cam arm so they will naturally impinge on the center as you adjust the ring, or possibly some sort of rubber washer or a stand-in. I suspect that will be the area that would take some design work, but certainly feels quite achievable to me. The two rings for the self-centering mechanism would be much smaller than on a traditional chuck since I imagine you don't need nearly that much range of adjustment, also now that I think of it could also be possible to design it around having the "bumper clamp thingies" on both faces of the clamp which if done well should help keep the piece running true (clearly a necessity).
Yeah, this definitely seems achievable. I think with enough development you could come up with a Longworth-style chuck for this lathe. I may revisit that eventually.
instead of ypur second chuck design,
id go back to the first, but instead of using a linear slide for the teeth, id make them a cam, pin the back, so that they swing in and out, and then ad a second pin and foot to allow it to hold onto the tube and remain parallel, you can then change the agle or curve of the back of the feet to allow for more gentle movement at different sizes
This project looks like it wants air bearings for chuck alignment, and some kind or rotary air cylinder to handle chuck holding force.
Hey man thanks for the video. I have an extremely similar set up. Smaller and with off the shelf parts though. Question for you; how are you keeping your steppers synched? I'm running nema17s with a directional controller and a microstep driver and one motor is consistently a tiny bit faster than the other. Any issues with this? Mind if I ask what your electrics look like?
7:50 - Was there any reason to get ballscrew for the carriage? Is it possible to use cylindrical linear rails or box rails instead? The ballscrews are really expensive, could be as expensive as to the entire lathe and intended to be used for motorized linear motion to provide accurate positioning and repeatability down to few thousandths of an inch, which I think the glass lathe won't gain much from it. Are you planning to make the lathe's carriage linear motion automated?
Why not using a normal lathe chuck and replacing the jaws with a 3d printed plastic version?
using your old chuck with planetary-ring gear will be help
You're right, that would probably fix a lor of problems
@@SignalDitch Can you share the design file? The more participants use it, the more appropriate changes will be made.
I really hope you have a dozen of those zeolite bags, because you'll need a *lot* of it for a concentrator that can properly run a torch that size :)
Since you're in the US, it probably makes more sense to just hit up medical supply companies and get a quantity of good-but-scrap-for-medical-use concentrators at a steep discount. At the very least you'll want to salvage the compressors out of them, because concentrators also require a lot of flow at a decent pressure to be efficient.
Also, I don't see a driven secondary spindle on the lathe - you'll want to think about adding one soon, because for a lot of operations you need synchronous spindles and dual workholding, you can't just rely on one.
I really try to be charitable in my reply to comments like this so I'll just address each of your concerns in turn.
- I have several kilos of Sodium Zeolite, I don't know why it was shipped to me in 500g bags. I don't know how many bags of zeolite I should have held up for illustrative purposes to avoid this comment.
- I already have a capable oil-less compressor from another project.
- Building my own PSA concentrator was not Plan A, the ubiquitous advice of "just go buy decommissioned concentrators from medical suppliers" appears to have gotten more difficult recently (or most people who suggest it have never tried) so that wasn't an economical option, especially considering I already have a compressor and a stock of pneumatic valves and fittings appropriate for the project.
- If you're curious, I'll be building a modified version of the "oxykit" oxygen concentrator, it's an open source project that you can find here on CZcams.
- In the previous video about this lathe, I review the design in its entirety and you can see that video for more details. In short, the headstock was a testbed and now that I know what works, I'll do the same for the tailstock. In this video when I said "I only need to replicate what I've done in the headstock to the tailstock," this is what I was referring to.
I welcome any and all suggestions and critique but I do need you to assume that I have even the barest knowledge on the subject. I may be out of my wheelhouse as an EE, but I do know what I'm talking about sometimes.
@@SignalDitch Good reply, thanks for clarifying :)
I might have been a bit asleep when watching the video.
Looking forward to seeing the results of all this, a homemade concentrator would definitely be new in the world of... uh... DIY glassblowers, I guess.
perhaps you could vlog or stream. it could be interesting.
How much misalignment/dyssynchronous movement is acceptable for something like this? I've watched both videos on this lathe project and most of my concerns/thoughts about how well this will work boil down to that question.
Seems to me that glass, being as brittle as it is, requires that the two heads would need to be very tightly aligned and synchronized to keep from breaking the glass as it cools. In that case, I think that the notion that you can keep this project within the means of a non-machinist hobbyist on a tight budget might ultimately be too ambitious. Just mounting the whole thing to a wood assembly throws up a huge red flag if alignment needs to remain precise.
But maybe the glass tubing is so thin wall that the glass has enough flexibility to accommodate a small amount of misalignment. I think a lot of alignment issues could be addressed by not using the collets in both heads, but rather something similar to your original chuck design with soft/flexible jaws that would allow for several thousandths of movement to accommodate not only any misalignment but also the glass shrinking as it cools.
That leaves the issue of dyssynchronous rotation. Maybe the stepper motors are accurate enough to do this. But if it were me I would include some sort of limited slip clutch in at least one of the heads to allow for that sort of an issue. This sort of work seems to need only minimal torque, so a clutch that manages to keep things moving while slipping as soon as the two heads start trying to twist the workpiece would be an easy solution. Maybe there is even a way to use the stepper controller to allow for a controlled amount of slip in the one of the motors.
In any case, I came across your channel yesterday and am pretty impressed with what you're doing. Looking forward to watching more of your videos.
Nice flag of Zhelesnogorsk )
I think it's my favorite flag ever made
GREAT JOB...REQUEST,CAN YOU MAKE ME 4 -572B RF POWER TUBES MATCHED?
THE CHINES TUBES ARE WORTHLESS..THANK YOU
Just buy a 5lpm used O2 concentrator
As covid hit and the US medical industry wanted to prevent home treatment they enforced a concept that because medical oxygen was "prescription only" it would henceforth be prohibited to sell O2 concentrators online new OR second hand and Amazon and eBay took down all listings. Amazon started selling them new a year later (at kind of reasonable prices for little 3l/m units) when the use of patent medication was able to kill those going to hospital and the ban was no longer needed. I have not read about or tested to see if they are available used on eBay again.
The problem with serious glass blowing is that you may need 20l/m if you are using any more than one bigger torch simultaneously. Some of the 5l/m concentrators can be set to provide 10l/m at a bit less purity but I have seen people use 2 or 4 of the units for glass working.
It is a shame that the pharmaceutical industrial complex has near total control of medical care in most countries. When we compare the generic medication to the patent medication at "c 1 9 e a r l y . c o m" we see how much money has been stolen from regular folk to enrich those who want to see people ill or fearful.
Or a professional 10 or 20 liter unit from Mountain Glass. They cost the same as medical units and have two to three times the capacity. 5 lpm is not enough for any but the smallest torches. I use 14 lpm and can't run a torch large enough to work 2 inch boro tubing in any time frame I can tolerate!