Col Posted January 25, 2012 Share Posted January 25, 2012 Making a shell pasting machine is doable if you are mechanically minded and dont mind settling for something less than a wasp. Link to comment Share on other sites More sharing options...
Xtreme Pyro Posted January 26, 2012 Share Posted January 26, 2012 (edited) Here is my pasting "machine", got the idea from a passfire article. It will paste shells 5" all the way up to 16", you just have to move the 3 rollers into the corresponding hole for that size of shell. Here is a picture of the entire jig, including the tape dispenser, which Ill upload more pictures of later: http://img844.imageshack.us/img844/7056/resampled20120125212835.th.jpg A closer view of the actual roller without the shell on it: http://img254.imageshack.us/img254/5991/20120125212934538.th.jpg A close up view of the roller, WITH an 8" shell on: http://img18.imageshack.us/img18/6571/20120125212920215.th.jpg Ill let you all know how it goes when I use the roller. I've pasted shells this way before (with one continuous strip). The roller should make pasting those larger shells quite a bit easier. Edited January 26, 2012 by Xtreme Pyro Link to comment Share on other sites More sharing options...
Col Posted January 26, 2012 Share Posted January 26, 2012 Nice work, that`ll make life easier. When you said `machine` I had visions of something motor driven Link to comment Share on other sites More sharing options...
Xtreme Pyro Posted January 26, 2012 Share Posted January 26, 2012 (edited) Nice work, that`ll make life easier. When you said `machine` I had visions of something motor driven Haha, yea that's why I put "machine" in quotes. I do have an idea for a motor driven version though. Edited January 26, 2012 by Xtreme Pyro Link to comment Share on other sites More sharing options...
Col Posted January 26, 2012 Share Posted January 26, 2012 (edited) A motorised pasting machine is a challenge but it can be fun if you enjoy making things. Mine is still a week or two from completion, it`ll handle 2"- 8" shells (10" at a push) which is plenty for me. You`ll find half the battle is fabricating one-off components that can`t be bought, improvised or adapted from everyday items. .like this weird looking contraption http://i770.photobucket.com/albums/xx341/colinspyro/shell%20pasting/fabrication.jpg Edited January 26, 2012 by Col Link to comment Share on other sites More sharing options...
dagabu Posted January 26, 2012 Share Posted January 26, 2012 A motorised pasting machine is a challenge but it can be fun if you enjoy making things. Mine is still a week or two from completion, it`ll handle 2"- 8" shells (10" at a push) which is plenty for me. You`ll find half the battle is fabricating one-off components that can`t be bought, improvised or adapted from everyday items. .like this weird looking contraption http://i770.photobucket.com/albums/xx341/colinspyro/shell%20pasting/fabrication.jpg I likes the looks of that! -dag Link to comment Share on other sites More sharing options...
Col Posted January 27, 2012 Share Posted January 27, 2012 cheers dag, Its made from scrap aluminium (box, rod and tube) and other odds and ends i had laying around...i dont throw anything away Link to comment Share on other sites More sharing options...
allrocketspsl Posted January 27, 2012 Share Posted January 27, 2012 looks good is it all stainless how much did you spend roughly parts anything out of the unusual!Actually making my firewheel mate!!! Jeff Link to comment Share on other sites More sharing options...
Col Posted January 27, 2012 Share Posted January 27, 2012 Hi Jeff, The component in the pic is just a small part of the machine, its made entirely from T6 aluminium apart from the stainless screws and nylon boits. The total cost will be under £100 ($150), finding a few bargains and a fair bit of recycling / adaptation helped keep the cost down.Can`t wait to see the wheel Link to comment Share on other sites More sharing options...
allrocketspsl Posted January 28, 2012 Share Posted January 28, 2012 Hi Jeff, The component in the pic is just a small part of the machine, its made entirely from T6 aluminium apart from the stainless screws and nylon boits. The total cost will be under £100 ($150), finding a few bargains and a fair bit of recycling / adaptation helped keep the cost down.Can`t wait to see the wheel thanks mate,Im going to put lance work on it instead of color pots like the maltese.When it starts or before the lance work will lite then the drivers red and green doing a cross design maybe four directions,some whitsles and a big report at the end.Going for a delay like it doens then booomb.Im actually excited since beside small saxons its been a year since I made one.Your pasting machine how do you rotate the bll by hand? Link to comment Share on other sites More sharing options...
allrocketspsl Posted January 28, 2012 Share Posted January 28, 2012 Here is my pasting "machine", got the idea from a passfire article. It will paste shells 5" all the way up to 16", you just have to move the 3 rollers into the corresponding hole for that size of shell. Here is a picture of the entire jig, including the tape dispenser, which Ill upload more pictures of later: http://img844.imageshack.us/img844/7056/resampled20120125212835.th.jpg A closer view of the actual roller without the shell on it: http://img254.imageshack.us/img254/5991/20120125212934538.th.jpg A close up view of the roller, WITH an 8" shell on: http://img18.imageshack.us/img18/6571/20120125212920215.th.jpg Ill let you all know how it goes when I use the roller. I've pasted shells this way before (with one continuous strip). The roller should make pasting those larger shells quite a bit easier. thats a great design looks pretty simple really.How do you keep tension on the tape as it rotates?Nice clean design mate Link to comment Share on other sites More sharing options...
Col Posted January 28, 2012 Share Posted January 28, 2012 Sounds good, the cross desgn and lances will make it less prone to turning into a fireball like my last one The pasting machine uses a couple of motors, a 3/4hp and a high torque, low rpm with variable speed. Link to comment Share on other sites More sharing options...
firebird Posted January 28, 2012 Share Posted January 28, 2012 The superstringer tapes shells from 2.5" to 12", that's a pretty wide range for 99% of hobbiests. Besides, if you spend the time to make a 16" shell, you can paste it by hand.With a very cheap mod the SS can do 16's no problem. I have the first SS as per my request to JIm I had ask Jim to modify the origanal Stinger He had already considered doing the same thing i was asking so i just helped with a little nudge . Minehas the bigger steppers also. Link to comment Share on other sites More sharing options...
Col Posted February 5, 2012 Share Posted February 5, 2012 I was surprised to see the SS uses 570 oz-in (3lb-ft) steppers. I thought they would be more powerful but obviously its plenty as they can rotate a 16" shell. Link to comment Share on other sites More sharing options...
Col Posted February 12, 2012 Share Posted February 12, 2012 I likes the looks of that! -dag Here`s another piece of the puzzle http://i770.photobucket.com/albums/xx341/colinspyro/shell%20pasting/basiclayout.jpgAnother piece of the puzzle almost finished Link to comment Share on other sites More sharing options...
Zmuro Posted February 12, 2012 Share Posted February 12, 2012 (edited) I found a video of homemade pasting machine similar to your design Col. I hope you will post a picture or vid of your working machine http://www.youtube.com/watch?v=d1u6BjZH430 Edited February 12, 2012 by Zmuro Link to comment Share on other sites More sharing options...
Col Posted February 12, 2012 Share Posted February 12, 2012 (edited) I came across that one, its good but i wanted to avoid an egg shaped result, the other issue is the tape isnt applied under enough tension. The wheel design is much better as it applies the tape under tension and allows for adjustment of the shell angle and rotation speed during the pasting process to produce a round shell. The only downside is its a lot harder to build Here`s a test i did to see how it would cope with the offset loading. It didn`t have any trouble turning the wheel considering the driveshaft bearings were held on with g-clamps and the drive wheels were only a friction fit on the shafts. Everything is solidly fixed now and the power transfer is a lot more efficient. http://www.youtube.com/watch?v=aBp1KrMR8eU Here is the machine i`m trying to emulate, they are not quite as simple as they appear http://www.youtube.com/watch?v=4UgVHU7_yk4 Edited February 13, 2012 by Col Link to comment Share on other sites More sharing options...
Zmuro Posted February 14, 2012 Share Posted February 14, 2012 I saw that chinese machine and the wheel design is crucial if you want to make that swinging arm. Is your wheel from bicycle rim? Link to comment Share on other sites More sharing options...
Col Posted February 14, 2012 Share Posted February 14, 2012 Its a T6 alloy wheel with a triple cavity I-beam cross section It needs to be pretty sturdy as there`s no spokes. The cavity is needed so the bolt heads can be recessed into the rim. It`ll be a bumpy ride if they are in the way of the drive wheels Here`s one of the drive wheels. They are pinned to the driveshafts via 2 steel collets. The driveshafts are 5/8", connected together by a belt so both are driven. http://i770.photobucket.com/albums/xx341/colinspyro/shell%20pasting/drivewheel.jpg Link to comment Share on other sites More sharing options...
Zmuro Posted February 14, 2012 Share Posted February 14, 2012 How are you planing to make the swing arm? If you look at chinese machine it rotates shell faster at the beginning when the tape is applied over the equator and reduces speed when the tape is applied near the poles. Link to comment Share on other sites More sharing options...
Col Posted February 14, 2012 Share Posted February 14, 2012 (edited) The swing arm is very easy, just make a square frame thats wider than the wheel and pivot it on bearings at the sides inline with the center of the wheel. Mount the rotation motor midway along the top rail and the bottom support midway along the bottom rail of the square frame so they are also inline with the center of the wheel . The shell will remain perfectly centered in the wheel when you adjust the frames angle The shell rotation speed is more complex than it appears. Its hard to spot without dissecting the vid, but it alters at every angle change. When you get into the math it quickly becomes apparent the shell rotation speed is dependant on a few variables.. the shell size, wheel speed, pasting angle and even the tape width play a part. To the left of the machine in the vid there`s a control box with a row of buttons, most likely presets for different sized shells. Edited February 14, 2012 by Col Link to comment Share on other sites More sharing options...
allrocketspsl Posted February 14, 2012 Share Posted February 14, 2012 The swing arm is very easy, just make a square frame thats wider than the wheel and pivot it on bearings at the sides inline with the center of the wheel. Mount the rotation motor midway along the top rail and the bottom support midway along the bottom rail of the square frame so they are also inline with the center of the wheel . The shell will remain perfectly centered in the wheel when you adjust the frames angle The shell rotation speed is more complex than it appears. Its hard to spot without dissecting the vid, but it alters at every angle change. When you get into the math it quickly becomes apparent the shell rotation speed is dependant on a few variables.. the shell size, wheel speed, pasting angle and even the tape width play a part. To the left of the machine in the vid there`s a control box with a row of buttons, most likely presets for different sized shells. ok i understand,lol! Link to comment Share on other sites More sharing options...
Col Posted February 14, 2012 Share Posted February 14, 2012 If it was easy..it wouldn`t be worth doing Link to comment Share on other sites More sharing options...
allrocketspsl Posted February 14, 2012 Share Posted February 14, 2012 If it was easy..it wouldn`t be worth doing your right mate since I saw that machine last year I have wanted to scale it down but I think its out of my making abilities Link to comment Share on other sites More sharing options...
Col Posted February 15, 2012 Share Posted February 15, 2012 The smaller machine in the top left of the video (with the lid up) would be easier to make (no wheel). It can paste a 2" shell in 11 seconds It might accomodate 3" or 4" shells by the looks of it. The only downside is they`ll be egg shaped. Link to comment Share on other sites More sharing options...
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