Sleipner Posted February 28, 2018 Posted February 28, 2018 I also have a problem with the threads not collecting the powder as it should. there is coming a pile of powder under the plates. Edit: Could it be that the powder die dosen't have a V enough ? so the powder dosen't get correctly into the threads ? You're making a lot of fuse it seems I agree with @Simoski about the turns per cm being the cause of the spilling of powder. In the file I uploaded with all the design parameters, I calculated them for a "coverage" of 80% which I picked from looking at existing visco fuse. Looking at your fuse I think you have a fair bit lower coverage, giving holes that the powder can fall out of. I'd say you need to increase the turns/cm of the first plate a bit, and the turns/cm of the second plate a fairly significant amount. You could also get thicker thread if you have some.
Svimmer Posted February 28, 2018 Author Posted February 28, 2018 You're making a lot of fuse it seems I agree with @Simoski about the turns per cm being the cause of the spilling of powder. In the file I uploaded with all the design parameters, I calculated them for a "coverage" of 80% which I picked from looking at existing visco fuse. Looking at your fuse I think you have a fair bit lower coverage, giving holes that the powder can fall out of. I'd say you need to increase the turns/cm of the first plate a bit, and the turns/cm of the second plate a fairly significant amount. You could also get thicker thread if you have some. The top plate spins 360 rpm. it might be that the collector drum is to small so it pulls the fuse way to fast. it makes fuse alot faster then other machines with engines ive seen.
MrB Posted February 28, 2018 Posted February 28, 2018 (edited) In the file I uploaded with all the design parameters, For what ever reason, the file doesn't seem to be available anymore. The top plate spins 360 rpm. it might be that the collector drum is to small so it pulls the fuse way to fast. The actual RPM isn't THAT important. The ratio, of revolutions, in relation to fuse feed length, is. To increase coverage you need to either add more spools of thread, use thicker thread, or slow down the feed rate. Or a combination. Also, i know people have been "tuning" the fuse production using straight up sugar. It wont burn, but is pretty much as cheap as it can be, and you can tweak the machine until you get a result that looks like it will be serviceable, and start using BP at that point. A bonus of that is, no fire hazard while tweaking. Edited February 28, 2018 by MrB
Svimmer Posted February 28, 2018 Author Posted February 28, 2018 For what ever reason, the file doesn't seem to be available anymore. The actual RPM isn't THAT important. The ratio, of revolutions, in relation to fuse feed length, is. To increase coverage you need to either add more spools of thread, use thicker thread, or slow down the feed rate. Or a combination. Also, i know people have been "tuning" the fuse production using straight up sugar. It wont burn, but is pretty much as cheap as it can be, and you can tweak the machine until you get a result that looks like it will be serviceable, and start using BP at that point. A bonus of that is, no fire hazard while tweaking.Takk
Sleipner Posted March 1, 2018 Posted March 1, 2018 For what ever reason, the file doesn't seem to be available anymore. I could hardly find it myself (that part of this forum software isn't easy to get an overview of), but here is a direct link: https://www.amateurpyro.com/forums/files/file/119-visco-design-parameters/ I updated the file as per your suggestions so it should be easier to follow.
Simoski Posted March 1, 2018 Posted March 1, 2018 (edited) Thanks Sleipner Edited March 1, 2018 by Simoski
Svimmer Posted March 1, 2018 Author Posted March 1, 2018 (edited) http://bldr.no/BaI Another problem. either i need to find a way to get the fuse tighter so it wont have that problem or i need another coating device lol. Edit: Also the thread dosent burn up. when i used polyester it did but not with cotton. Burn testhttps://youtu.be/YN6sIpsuNww Edited March 1, 2018 by Svimmer
Mumbles Posted March 2, 2018 Posted March 2, 2018 Soaking the string in nitrate, or making your BP mixture a bit more oxidizer rich can help to eliminate the smoldering cotton.
Svimmer Posted March 5, 2018 Author Posted March 5, 2018 http://bldr.no/Bbv Ive done few tests now. Im going to make a new machine im pretty sure the problem is the pulley wheels is not 100% round so it spins uneven. and yes the secound disc is going to spin faster on the new machine.
vendrite Posted March 6, 2018 Posted March 6, 2018 https://www.youtube.com/watch?v=YQ7SA8OQMzc What good looking fuse! I hope this helps as a inspiration to all present and future fuse makers. 2
Svimmer Posted March 6, 2018 Author Posted March 6, 2018 https://www.youtube.com/watch?v=YQ7SA8OQMzc What good looking fuse! I hope this helps as a inspiration to all present and future fuse makers. Yup he makes the machines and sells them.
Simoski Posted March 10, 2018 Posted March 10, 2018 (edited) Excellent Tai vid there.It gives me inspiration and makes me wanna blow shit up! Loving the machine Svimmer Edited March 10, 2018 by Simoski 1
Svimmer Posted March 10, 2018 Author Posted March 10, 2018 Excellent Tai vid there.Makes me wanna blow shit up! Loving the machine Svimmerhttps://www.youtube.com/watch?v=mDQlO0z5WpI Some better result but im not where i want to be yet.
Simoski Posted March 10, 2018 Posted March 10, 2018 it looks good the spitting fire worries me though! can you blow it out with your own lungs?
Svimmer Posted March 10, 2018 Author Posted March 10, 2018 it looks good the spitting fire worries me though! can you blow it out with your own lungs? There was little too mutch kno3 in the comp i used. but no i cant blow it out ive tried
Svimmer Posted March 16, 2018 Author Posted March 16, 2018 http://bldr.no/Be0 http://bldr.no/Be1 http://bldr.no/Be2 http://bldr.no/Be3 New hopefully i havent done something wrong with the drawings
Svimmer Posted April 2, 2018 Author Posted April 2, 2018 (edited) Finally done with the new machine. Im pretty sure it will weave alot nicer than the last one since the plates spins a lot faster now and the drum pulls slower ! Also the second plate spins faster then the first one ! Just need to wait for the thread i ordered pretty sure 15.000 yards is enough for this machine for awhile Edited April 2, 2018 by Svimmer
Svimmer Posted April 9, 2018 Author Posted April 9, 2018 Finally tested the machine and it is weaving nice but after the coating device it get uneven :/
Svimmer Posted May 10, 2018 Author Posted May 10, 2018 Probably my best result so far ! http://bldr.no/Bq6
Svimmer Posted September 17, 2018 Author Posted September 17, 2018 Im working on a new machine now My plan is to use these bearings for the disc's https://www.aliexpress.com/item/2018-Thrust-Bearing-Axk-Kfl08-Kfl10-Kfl12-Kfl15-Bore-8mm-10mm-12mm-15mm-Pillow-Bearing-Mounted/32832241899.html?spm=a2g0s.13010208.99999999.5.30453c00AjI6hx And use these Motors https://www.aliexpress.com/item/Free-Ship-Nema-17-Stepper-Motor-48mm-Nema17-Motor-42BYGH-2A-4-Lead-17HS4801-Motor-1m/32572890101.html?spm=2114.search0604.3.1.761e5b12PkbMOJ&s=p&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_5017611_10059_10696_100031_10084_10083_10103_451_452_10618_10307_5017711,searchweb201603_2,ppcSwitch_5&algo_expid=845cec21-33ff-4940-ad60-bd4075e171f3-0&algo_pvid=845cec21-33ff-4940-ad60-bd4075e171f3&transAbTest=ae803_1&priceBeautifyAB=0 And these Pulleys https://www.aliexpress.com/item/SUMRAY-3M-Timing-Pulley-Belt-Set-3M-15T-45T-Motor-Pulley-Wheel-Kit-Reduction-1-3/32909763439.html?spm=2114.search0604.3.15.6a276ddbixzHRI&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_5017611_10059_10696_100031_10084_10083_10103_451_452_10618_10307_5017711,searchweb201603_2,ppcSwitch_5&algo_expid=6984f3ee-0b0f-4f3b-a2ec-22f60f6c6775-2&algo_pvid=6984f3ee-0b0f-4f3b-a2ec-22f60f6c6775&transAbTest=ae803_1&priceBeautifyAB=0 Tips is appreciated
Baldor Posted September 18, 2018 Posted September 18, 2018 You will need a microcontroller and motor controllers to control these steppers. Of course, you will have the added benefit of being able to finely control the relative speed of the discs. 1
Svimmer Posted September 18, 2018 Author Posted September 18, 2018 You will need a microcontroller and motor controllers to control these steppers. Of course, you will have the added benefit of being able to finely control the relative speed of the discs.Yeah thats the plan
Juanma9410 Posted July 7, 2019 Posted July 7, 2019 Hello, any news of the machine? I want to build one.the videos are down
Arthur Posted July 7, 2019 Posted July 7, 2019 Every time someone gets close to a working visco machine they stop posting and their vids vanish, without another post ever.
Fulmen Posted July 8, 2019 Posted July 8, 2019 I've noticed the same. They seem to get as far as a working prototype, then nothing. I suspect they are "builders" that didn't understand what they were getting into. Building the first machine is maybe half the work, you still have to get it working properly. That can take a lot of trial and error, IIRC Lloyd called running his Bickford machine "a four hour heart attack".
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