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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Super-glued finger
First time for me, leak down the thread of the tube under the spout
plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free |
#2
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Super-glued finger
On 11/12/2017 7:26 PM, N_Cook wrote:
First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free **That's part of the reason why I use this stuff: http://www.loctite-consumer.com.au/e...powerflex.html Specifically, the little bottle, with the squeezy things on the sides. No leak, no fuss. And yes, I, too, have had those crappy tubes leak glue onto my fingers. The giveaway is the warm feeling, from the exothermic reaction between the glue and your skin. -- Trevor Wilson www.rageaudio.com.au |
#3
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Super-glued finger
On 12/11/2017 1:56 PM, N_Cook wrote:
First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free You don't really have to do anything if you accidentally glue a finger with superglue. The skin constantly releases oil, sweat and dead cells. The glue comes away along with these byproducts after some time. |
#4
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Super-glued finger
Maybe you heard about surfical gloves !
N_Cook a écrit : First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free |
#5
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Super-glued finger
On 11/12/2017 09:51, Pimpom wrote:
On 12/11/2017 1:56 PM, N_Cook wrote: First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free You don't really have to do anything if you accidentally glue a finger with superglue. The skin constantly releases oil, sweat and dead cells. The glue comes away along with these byproducts after some time. Its not the glue bond itself that is the problem, but what you end up glued to. Even a small tube glued transverse to a finger , makes that whole hand pretty useless. I'll leave a pack of latex gloves next to the jam jar containing superglue tubes and pack of activated silica gel. |
#6
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Super-glued finger
On Monday, December 11, 2017 at 6:01:52 AM UTC-5, N_Cook wrote:
Its not the glue bond itself that is the problem, but what you end up glued to. Even a small tube glued transverse to a finger , makes that whole hand pretty useless. I'll leave a pack of latex gloves next to the jam jar containing superglue tubes and pack of activated silica gel. Latex & Superglue. A recipe for disaster. What you want to use would be Nitrile gloves. Superglue has a near-instant affinity to latex, much less so to nitrile. SG sticks even more poorly to polyethylene gloves - such as the clear gloves that food workers often use. Also very cheap. Peter Wieck Melrose Park, PA |
#7
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Super-glued finger
On Monday, 11 December 2017 09:51:31 UTC, Pimpom wrote:
On 12/11/2017 1:56 PM, N_Cook wrote: First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free You don't really have to do anything if you accidentally glue a finger with superglue. The skin constantly releases oil, sweat and dead cells. The glue comes away along with these byproducts after some time. shhh, you're being too sensible. |
#8
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Super-glued finger
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#9
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Super-glued finger
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#10
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Super-glued finger
On 12/11/2017 4:31 PM, N_Cook wrote:
On 11/12/2017 09:51, Pimpom wrote: On 12/11/2017 1:56 PM, N_Cook wrote: First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free You don't really have to do anything if you accidentally glue a finger with superglue. The skin constantly releases oil, sweat and dead cells. The glue comes away along with these byproducts after some time. Its not the glue bond itself that is the problem, but what you end up glued to. Even a small tube glued transverse to a finger , makes that whole hand pretty useless. I'll leave a pack of latex gloves next to the jam jar containing superglue tubes and pack of activated silica gel. The glue comes off, what it sticks to the finger comes off too. At least that's been my experience. |
#11
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Super-glued finger
On Mon, 11 Dec 2017 15:21:25 +0530, Pimpom wrote:
On 12/11/2017 1:56 PM, N_Cook wrote: First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free You don't really have to do anything if you accidentally glue a finger with superglue. The skin constantly releases oil, sweat and dead cells. The glue comes away along with these byproducts after some time. Superglue is used in surgery so we don't want it to come off too quickly! -- http://www.npsnn.com |
#12
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Super-glued finger
On 12/11/2017 5:01 AM, N_Cook wrote:
On 11/12/2017 09:51, Pimpom wrote: On 12/11/2017 1:56 PM, N_Cook wrote: First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free You don't really have to do anything if you accidentally glue a finger with superglue. The skin constantly releases oil, sweat and dead cells. The glue comes away along with these byproducts after some time. Its not the glue bond itself that is the problem, but what you end up glued to. Even a small tube glued transverse to a finger , makes that whole hand pretty useless. I'll leave a pack of latex gloves next to the jam jar containing superglue tubes and pack of activated silica gel. Uhh, is that what I need to do, pack an activated silica gel pack in a bag with my super glue? I use the Loctite container because of it's ease of application and lifetime, but I have twisted off the nozzle after the glue glues it on. I have a med that comes with two silca gel plastic containers, the diameter of a dime and about 3/4" tall. What's the best way to reactivate them, they're plastic housings. Mikek |
#13
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Super-glued finger
Silica Gel may be reactivated if put in an electric oven or toaster oven at 200F for 20 minutes (small packs). Longer for larger packs. This may be done many times.
Gas ovens are very moist - electric ovens are not. Never tried in a microwave... wanna be a guinea pig? Peter Wieck Melrose Park, PA |
#14
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Super-glued finger
On 11/12/2017 16:10, amdx wrote:
On 12/11/2017 5:01 AM, N_Cook wrote: On 11/12/2017 09:51, Pimpom wrote: On 12/11/2017 1:56 PM, N_Cook wrote: First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free You don't really have to do anything if you accidentally glue a finger with superglue. The skin constantly releases oil, sweat and dead cells. The glue comes away along with these byproducts after some time. Its not the glue bond itself that is the problem, but what you end up glued to. Even a small tube glued transverse to a finger , makes that whole hand pretty useless. I'll leave a pack of latex gloves next to the jam jar containing superglue tubes and pack of activated silica gel. Uhh, is that what I need to do, pack an activated silica gel pack in a bag with my super glue? I use the Loctite container because of it's ease of application and lifetime, but I have twisted off the nozzle after the glue glues it on. I have a med that comes with two silca gel plastic containers, the diameter of a dime and about 3/4" tall. What's the best way to reactivate them, they're plastic housings. Mikek Sometimes there is a few colour indicator crystals mixed in , change colour when dried out, in an oven. Otherwise plain silica gel crytals , non-intuitively, change colour from pure white when damp to a vaguely off-white colour when dried out. |
#16
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Super-glued finger
On 11/12/2017 19:14, amdx wrote:
On 12/11/2017 10:24 AM, wrote: Silica Gel may be reactivated if put in an electric oven or toaster oven at 200F for 20 minutes (small packs). Longer for larger packs. This may be done many times. Gas ovens are very moist - electric ovens are not. Never tried in a microwave... wanna be a guinea pig? Peter Wieck Melrose Park, PA I looked up the microwave trick, but my capsules are such that I can't see the silica and would not know when is is dry or how to test it. I guess I could just assume it is dry after microwaving a couple times. Mikek weigh until no more reduction, then repeat the "dose" each time |
#17
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Super-glued finger
On Mon, 11 Dec 2017 08:26:33 +0000, N_Cook wrote:
First time for me, leak down the thread of the tube under the spout plastic, one glued on index finger. A loose loop of leather-work cotton thread around the affected area, tied off. Teased out cotton wool , wound around over the thread, doused with acetone. A matchstick in the loop , to Spanish Windlass. Squash wool, wind a turn, repeat over some minutes until free I quit using Super Glue years ago. About the only thing it seems to glue well, is a persons skin. I've used it on plastics, IT FAILED. I've used it on wood, IT FAILED. I've used it on metals, IT FAILED. I've used it on porcelin (like a broken cup), it somewhat held, but did not last long. I'll stick to glues that WORK, such as epoxy. Partiucularly JB Weld, that stuff is the best! Super Glue only has one purpose. to fill space on the shelves in stores. Although I have heard about guys gluing parts of their body to their girlfriends so the woman cant leave them. I wont go into detail..... Any guy that desperate needs a lot more than super glue. Some medical help makes more sense.... If you only glued two fingers together, you'll live.You just have wider fingers and less of them.... And be sure to buy mittens, not gloves |
#18
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Super-glued finger
On Tuesday, December 12, 2017 at 4:23:52 AM UTC-5, wrote:
I quit using Super Glue years ago. About the only thing it seems to glue well, is a persons skin. I've used it on plastics, IT FAILED. I've used it on wood, IT FAILED. Piano tuners use it. The tuning pins on a piano are a friction fit in a wood block. Over time the holes can become oversized and the pins will slip. You can redrill and fit the next size pin, or even replace the pinblock, but it's a lot of work and expense on an old piano. It's possible to flip the piano on its back (using the proper tools) and drip a little Super glue into the pinholes. Some people get good results this way and get a little more life out of an old piano not worth rebuilding. |
#20
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Super-glued finger
Super-glue (cyanoacrylate) is not good in shear. But that is not to suggest that it does not hold. So as a friction-enhancer (piano tuning, for example), it would be excellent as any sharp pressure (next tuning) would shear it easily.
Super-glue is excellent for any connections not subject to shear forces, extreme vibration or where the material cannot penetrate somewhat into the substrate. I use it commonly to make O-ring belts for tuning mechanisms or similar - and I have several of those that have been in actual use (Not shelf-queens) for over 15 years. That is a pure tension application. Peter Wieck Melrose Park, PA |
#21
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Super-glued finger
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#22
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Super-glued finger
On Tuesday, December 12, 2017 at 12:32:54 PM UTC-5, N_Cook wrote:
What scarf angle do you use for the join? nitrile/neoprene rubber cord ? Neoprene. And as sharp an angle as I can manage with a fresh X-Acto blade and clean mating surfaces. I would guess around 30 degrees or so. I have a marked, slotted block so that I can set the O-ring in the block and stretch it a specific amount so each cut is the same angle. I make a sloppy joint (extra glue), then more glue, dip it in baking soda (accelerant), allow to cure, then file the flash with a jeweler's file. It almost takes longer to describe than to do it. Here is a picture from Phil's Old Radios: https://antiqueradio.org/art/Zenith12S471NewBeltCut.jpg Nothing wrong with a single-edge razor. Peter Wieck Melrose Park, PA |
#23
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Super-glued finger
In article ,
wrote: I quit using Super Glue years ago. About the only thing it seems to glue well, is a persons skin. I've used it on plastics, IT FAILED. I've used it on wood, IT FAILED. I've used it on metals, IT FAILED. I've used it on porcelin (like a broken cup), it somewhat held, but did not last long. The newer formulations, applied and used properly, seem to be better. Plain cyanoacrylates (e.g. the lower-viscosity ones) seem to be rather brittle. They don't deal well with materials that flex at all, and are best reserved for entirely-rigid materials. The low-viscosity types have very little gap-filling ability - work OK on clean breaks but not well if the joint is rough and has any air-space. There are newer varieties - composites of cyanoacrylate and other materials, sometimes including what seems to be something like nanoparticles of rubber of some sort. These are often marketed as "toughened" cyanoacrylate. I've had better luck with these, when used as a more general-purpose adhesive. I presume that the added materials prevent small fractures from propagating through the solidified adhesive. The occasional ceramic cup or dish I've repaired with the toughened cyanoacrylate have held up OK. Low-viscosity cyanoacrylate also makes a nice quick (and hard) finish for small lathe-turned wood object such as pens. You can use it as a structural fill, too... put a few drops into a hole, sprinkle in some baking soda (sodium bicarbonate), stand back while it fumes, and wait a minute. The result is a rock-hard white solid. To fill large holes, do this in repeated small layers for best results (warning, it exotherms a lot for the first few seconds - hot enough to burn you). I'll stick to glues that WORK, such as epoxy. Partiucularly JB Weld, that stuff is the best! Another good one that a friend turned me onto, a year or two ago, is West Marine's G/flex 655-K. It's a thickened epoxy, sold for the purpose of repairing plastic boat hulls. It'll bond a lot of the more difficult plastics (flashing a torch flame over them for an instant is recommended - this oxidizes the low-surface-energy plastic and creates bonding sites for the epoxy to react with) and it works a charm on metal and wood as well. My friend learned about it when he asked a supplier for a glue to use when installing stone counter-tops. He tried it out, epoxying a length of pipe and a flange to a piece of polished granite... just scuffed up the surface a bit with some carbide paper and glued the flange down. After it cured, he banged sideways on the pipe with a sledgehammer. The epoxy didn't fail, the steel didn't fail... when he managed to bang it free, the granite failed, and a bunch of crystals tore out of the slab and remained firmly cemented to the flange. The kit isn't dirt-cheap but isn't ridiculously priced, and you get a lot of epoxy (8.4 oz). It's become my general-purpose go-to epoxy. If you only glued two fingers together, you'll live. You'll also learn why it makes good sense to buy a small bottle of cyanoacrylate de-bonding liquid, and keep it in your shop next to the cyanoacrylate adhesive. Cheap insurance against torn skin, and having to admit an embarrassing oops to one's significant other :-) |
#24
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Super-glued finger
On 12/12/2017 17:58, wrote:
On Tuesday, December 12, 2017 at 12:32:54 PM UTC-5, N_Cook wrote: What scarf angle do you use for the join? nitrile/neoprene rubber cord ? Neoprene. And as sharp an angle as I can manage with a fresh X-Acto blade and clean mating surfaces. I would guess around 30 degrees or so. I have a marked, slotted block so that I can set the O-ring in the block and stretch it a specific amount so each cut is the same angle. I make a sloppy joint (extra glue), then more glue, dip it in baking soda (accelerant), allow to cure, then file the flash with a jeweler's file. It almost takes longer to describe than to do it. Here is a picture from Phil's Old Radios: https://antiqueradio.org/art/Zenith12S471NewBeltCut.jpg Nothing wrong with a single-edge razor. Peter Wieck Melrose Park, PA So you don't roughen the surfaces with glass/sandpaper? Re elsewhere in this thread:- I'd picked up a bottle of superglue de-bonding , for such a finger-bonding emergency. Went to use it and the bottle was totally empty, the liquid had completely diffused? through the glass/cap , not a trace left, hence the procedure in the original post. |
#25
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Super-glued finger
On Tuesday, December 12, 2017 at 2:49:51 PM UTC-5, N_Cook wrote:
So you don't roughen the surfaces with glass/sandpaper? Re elsewhere in this thread:- I'd picked up a bottle of superglue de-bonding , for such a finger-bonding emergency. Went to use it and the bottle was totally empty, the liquid had completely diffused? through the glass/cap , not a trace left, hence the procedure in the original post. I do not, no. I want as clean a surface for bonding as possible. Soft neoprene O-Rings have enough surface texture, even when cut, to hold the glue. In my mind, the key to the process is the second dip + baking soda. Chip off the excess, then file smooth with a good jeweler's file. Nice thing about these files is that they remove hard stuff, but more-or-less don't affect soft materials, unlike sandpaper. Peter Wieck Melrose Park, PA |
#26
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Super-glued finger
N_Cook wrote:
On 11/12/2017 19:14, amdx wrote: On 12/11/2017 10:24 AM, wrote: Silica Gel may be reactivated if put in an electric oven or toaster oven at 200F for 20 minutes (small packs). Longer for larger packs. This may be done many times. Gas ovens are very moist - electric ovens are not. Never tried in a microwave... wanna be a guinea pig? Peter Wieck Melrose Park, PA I looked up the microwave trick, but my capsules are such that I can't see the silica and would not know when is is dry or how to test it. I guess I could just assume it is dry after microwaving a couple times. Mikek weigh until no more reduction, then repeat the "dose" each time The problem is most of the packs are heat-sealed together, so if you get it hot enough for the water to be driven out, the packs come apart and the dessicant material spills out. Usually, it is actually some kind of clay than silica gel. Jon |
#27
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Super-glued finger
In article ,
Jon Elson wrote: The problem is most of the packs are heat-sealed together, so if you get it hot enough for the water to be driven out, the packs come apart and the dessicant material spills out. Usually, it is actually some kind of clay than silica gel. So I found out the hard way. :-( I tried to do this in an ordinary electric oven. I was careful to set the operating temperature to the heat that the pack label indicated was correct for renewing the packs. Unfortunately, what seems to have happened is that the temperature of the tray on which I placed the packs, ended up significantly higher than the air temperature in the oven (not surprising since a lot of the heat is radiated from the heating coils). The plastic packets melted wherever they touched the tray, on the lower of the two trays in the oven. I suspect that these sorts of packs would be better refreshed in a forced-air convection oven, where the black-body temperature of the surfaces doesn't rise above the air temperature by more than a bit. |
#28
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Super-glued finger
In article ,
Dave Platt wrote: Unfortunately, what seems to have happened is that the temperature of the tray on which I placed the packs, ended up significantly higher than the air temperature in the oven (not surprising since a lot of the heat is radiated from the heating coils). The plastic packets melted wherever they touched the tray, on the lower of the two trays in the oven. Or alternatively take the silica gel out of the assorted paper, plastic and other packets, and dry it loose en-masse. Then repack it into a re-usable/re-sealable cloth bag to contain it, and yet allow passage of moisture into the crystals. -- --------------------------------------+------------------------------------ Mike Brown: mjb[-at-]signal11.org.uk | http://www.signal11.org.uk |
#29
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Super-glued finger
On 14/12/2017 20:05, Mike wrote:
In article , Dave Platt wrote: Unfortunately, what seems to have happened is that the temperature of the tray on which I placed the packs, ended up significantly higher than the air temperature in the oven (not surprising since a lot of the heat is radiated from the heating coils). The plastic packets melted wherever they touched the tray, on the lower of the two trays in the oven. Or alternatively take the silica gel out of the assorted paper, plastic and other packets, and dry it loose en-masse. Then repack it into a re-usable/re-sealable cloth bag to contain it, and yet allow passage of moisture into the crystals. Thats what I do. A large ex-pickle jar with bulk activated cilica gel crystals, slightly buff colour , not pure white. Then cut off the inside pocket cloth of worn trousers before dumping , tied off with crystals in, when required |
#30
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Super-glued finger
On 12/12/2017 1:46 PM, Dave Platt wrote:
... Another good one that a friend turned me onto, a year or two ago, is West Marine's G/flex 655-K. ... FWIW - the epoxy variety is G/flex 655. The "-K" is the repair kit. "-8" is just the 8 oz of epoxy ($26 at Amazon). Also available in the 5 gallon size for $860. |
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