Svimmer Posted February 4, 2018 Posted February 4, 2018 (edited) Made a really small visco fuse machine! got pretty suprised about the size when i printed out the templates. Still need some work to make it run really good. Next thing i need to get done is bearings. Once everything runs smooth it would be fun to add a engine to it. https://www.youtube.com/watch?v=Da1JiWKvqzQ&feature=youtu.b Edited February 4, 2018 by Sondre
Col Posted February 4, 2018 Posted February 4, 2018 (edited) Nice job, cant beat a bit of birch ply I`d create bearing housings in the mounts with a forstener bit and press the bearings in, wont take more than 5 minutes. Edited February 4, 2018 by Col 1
Svimmer Posted February 4, 2018 Author Posted February 4, 2018 Nice job, cant beat a bit of birch ply Thanks just got done with the collector
chuckufarley Posted February 4, 2018 Posted February 4, 2018 I like the use of a single belt to drive the separate plates in opposite directions. Very clever, looking forward to how it works in the end 1
Svimmer Posted February 4, 2018 Author Posted February 4, 2018 https://youtu.be/kRExIpmsaM4 Heres a short clip of how the collector is setup
Svimmer Posted February 8, 2018 Author Posted February 8, 2018 Just made this powder die but i didnt do any research on how to make it so it did not turn out relly good but hopefully it gets the job done! http://bildeopplaster.no/BWH
vendrite Posted February 9, 2018 Posted February 9, 2018 Great job, who's got a set of plans with dimensions?
Svimmer Posted February 9, 2018 Author Posted February 9, 2018 (edited) Great job, who's got a set of plans with dimensions?Thanks https://drive.google.com/drive/folders/0B6FDRNj1XOSfUW5sVGpIcGZyblEThere you go Edited February 9, 2018 by Svimmer
Svimmer Posted February 12, 2018 Author Posted February 12, 2018 http://bldr.no/BWz Tracer done ! The funnel is just temporary until i get one i ordered online. Still trying to find a good way to put the funnel.
vendrite Posted February 12, 2018 Posted February 12, 2018 Your powder die looks like it will work. Thanks for sharing 1
Svimmer Posted February 12, 2018 Author Posted February 12, 2018 (edited) I tested with some powder and it flows good until it get stuck. it might be because the powder is not 100% dry because i just cleaned the ballmill before i made the powder and it did clump in the mill so if it dosen't help to dry it then i need to granulate it. If that dosen't work then i have a problem. Edit: After granulating it flows really good Edited February 13, 2018 by Svimmer
davidh Posted February 13, 2018 Posted February 13, 2018 Kosanke wrote an article on defective fuse, and found that small changes in the mesh size of the granulated powder strongly affected burn rate. 1
Svimmer Posted February 19, 2018 Author Posted February 19, 2018 http://bldr.no/BYL First fuse made with the machine ! There is still some stuff i need to fix with the machine. i did put on som bearings i had but they where really bad so the plates is not straight anymore. so need to get new ones. and the bobbins jump off easy because the plates are not straight anymore. also the thread i had is not cotton. i have ordered bearings and thread now.
Svimmer Posted February 19, 2018 Author Posted February 19, 2018 https://youtu.be/G_t2eb_HRYI Heres how it burns. Yep way to fast so need to use another powder size.
Sleipner Posted February 19, 2018 Posted February 19, 2018 ..and/or use a slower burning formula. It was also changing burn rate along the way a bit. If you look at the fuse in your previous post the weaving is a bit uneven along the way giving different level of containment. I'm guessing that the fuse is not pulled through at a constant rate relative to the spinning disks, but a bit faster and slower here and there due to the rubber band belt. Maybe you can swap the rubber band for something stiffer that doesn't stretch? 1
Svimmer Posted February 19, 2018 Author Posted February 19, 2018 (edited) ..and/or use a slower burning formula. It was also changing burn rate along the way a bit. If you look at the fuse in your previous post the weaving is a bit uneven along the way giving different level of containment. I'm guessing that the fuse is not pulled through at a constant rate relative to the spinning disks, but a bit faster and slower here and there due to the rubber band belt. Maybe you can swap the rubber band for something stiffer that doesn't stretch?It is not a rubberband. it dosent stretch. the reason for the uneven weaving was because of 2 of the threads jumped off so i just cut them off just to test the fuse. im going to fix few things and il do and update. Edited February 19, 2018 by Svimmer
Svimmer Posted February 19, 2018 Author Posted February 19, 2018 ..and/or use a slower burning formula. It was also changing burn rate along the way a bit. If you look at the fuse in your previous post the weaving is a bit uneven along the way giving different level of containment. I'm guessing that the fuse is not pulled through at a constant rate relative to the spinning disks, but a bit faster and slower here and there due to the rubber band belt. Maybe you can swap the rubber band for something stiffer that doesn't stretch?Oh are you talking about the collector ?
Sleipner Posted February 19, 2018 Posted February 19, 2018 Oh are you talking about the collector ?Yep, that's the one that determines the pull through rate.
Svimmer Posted February 19, 2018 Author Posted February 19, 2018 Yep, that's the one that determines the pull through rate.i can try with more rubber bands until i get a better fix for it. http://bldr.no/BYM This fuse is also done with rubberbands.
Sleipner Posted February 19, 2018 Posted February 19, 2018 Also, and perhaps a more important factor to the uneven weaving, a wrong speed of the second disc. Looking at the fuse, you see that the second layer has a pattern to it, with about a third "empty" and two thirds "filled". That indicates to me that you need to change the sizes around on the second disc such that it spins ~50% faster. 1
Sleipner Posted February 19, 2018 Posted February 19, 2018 Or use a 50% thicker thread! This is why I'm going for the stepper solution in my design so I can avoid the labour of mechanically changing it depending on thread size and the tuning necessary.
Sleipner Posted February 19, 2018 Posted February 19, 2018 i can try with more rubber bands until i get a better fix for it. http://bldr.no/BYM This fuse is also done with rubberbands. Yes, looks pretty nice, although if you zoom in on the picture there is the same problem with a pattern of denser and less dense areas along the length of fuse. Most likely this pattern is not caused by the stretching of the rubber band but rather a mismatch of disc speed versus pull through rate. I think the guy that made this fuse also needs to speed up the second disc somewhat. 1
Svimmer Posted February 19, 2018 Author Posted February 19, 2018 Or use a 50% thicker thread! This is why I'm going for the stepper solution in my design so I can avoid the labour of mechanically changing it depending on thread size and the tuning necessary. Could it be that im using polyester thread ? cotton is softer and will be weavin nice or im wrong ?
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