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Jun 23, 2019, 06:09 PM
looking up, down under
scruffy1's Avatar
Quote:
Originally Posted by solentlife
Clothes pegs ... G clamps .... large awning clamps .... heavy weights (paint tins are my favourite) ... whatever to keep gear in place while glue sets up.
for my scale of construction, canned tomatoes are the weight of choice

if i need bigger, wine bottles are goog
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Jul 07, 2019, 08:38 AM
A Day @ a Time - Matt. 6:25-34
ruff1's Avatar

TIP - Self-Stick Velcro


Something I learned in my recent build. When you apply the self-stick velcro, separate the pieces and apply weight overnight. The adhesive material takes time to set up, and I did this with some I used to hold a battery. The pressure from a clamp with a hardwood piece over the velcro also recessed the it into the Foam a bit, so the battery is almost flush to the mounting surface. This helps reduce wiggle.

Earlier I had applied the Velcro without allowing the adhesive to set up; as I repositioned the items the Velcro would pull away.

Not exactly a homemade idea for cheap or free, but it does save wasting Velcro and makes it go further!
Jul 07, 2019, 11:37 AM
I Look, Listen, and Learn
Timbo383's Avatar
Thread OP
Quote:
Originally Posted by ruff1
Something I learned in my recent build. When you apply the self-stick velcro, separate the pieces and apply weight overnight. The adhesive material takes time to set up, and I did this with some I used to hold a battery. The pressure from a clamp with a hardwood piece over the velcro also recessed the it into the Foam a bit, so the battery is almost flush to the mounting surface. This helps reduce wiggle.

Earlier I had applied the Velcro without allowing the adhesive to set up; as I repositioned the items the Velcro would pull away.

Not exactly a homemade idea for cheap or free, but it does save wasting Velcro and makes it go further!
Need to try that, also don't forget that the oils in your hands and fingers can be transferred to the foam while you work with it so a good cleaning at the area where you apply the Velcro will also help in the adhesion.
Jul 07, 2019, 11:47 AM
Youtube channel : solentlifeuk
solentlife's Avatar
Another trick for Velcro ...

Apply UHU Por to the area and spread evenly and thin ... let dry. THEN apply Velcro - the Velcro adhesive then grabs better.

For anchoring Velcro ... especially in areas that are hard to get or subject to dirt / wet externally ... strips of glass fibre tape across the ends of the Velcro stop the end from lifting when removing battery.
Jul 07, 2019, 12:02 PM
Registered User
Squall's Avatar
A little hot glue around the Velcro edges helps to keep it from peeling off the foam,
Jul 07, 2019, 12:25 PM
A Day @ a Time - Matt. 6:25-34
ruff1's Avatar
Quote:
Originally Posted by Timbo383
Need to try that, also don't forget that the oils in your hands and fingers can be transferred to the foam while you work with it so a good cleaning at the area where you apply the Velcro will also help in the adhesion.
Yep, 90% alcohol does well to clean the surfaces.
Jul 07, 2019, 12:45 PM
Youtube channel : solentlifeuk
solentlife's Avatar
Quote:
Originally Posted by ruff1
Yep, 90% alcohol does well to clean the surfaces.
Window cleaner does as well ...
Jul 08, 2019, 01:35 AM
Mark Harrison
Quote:
Originally Posted by ruff1
Something I learned in my recent build. When you apply the self-stick velcro, separate the pieces and apply weight overnight. The adhesive material takes time to set up, and I did this with some I used to hold a battery. The pressure from a clamp with a hardwood piece over the velcro also recessed the it into the Foam a bit, so the battery is almost flush to the mounting surface. This helps reduce wiggle.

Earlier I had applied the Velcro without allowing the adhesive to set up; as I repositioned the items the Velcro would pull away.

Not exactly a homemade idea for cheap or free, but it does save wasting Velcro and makes it go further!
Great tip, here's mine: Don't try replacing velcro with Dual Lock, no matter how tempting it is to have the battery held totally immobile.

You can click the battery in, but the battery's not coming out until the bottom layer of Dual Lock pulls off a layer of foam!
Jul 08, 2019, 01:42 AM
Danish? Don't U eat that??
DKChris's Avatar
Quote:
Originally Posted by ruff1
Yep, 90% alcohol does well to clean the surfaces.
Careful with the alcohol if using hot glue for the assembly, though. Alcohol will release the grip of the hot glue and make it brittle (as most of us already know). Clean by rubbing with a lightly wetted rag or paper towel, kept well away from any hot glue, don't try to pour on even a few drops, you'll never know where it goes.


Quote:
Originally Posted by marhar
Great tip, here's mine: Don't try replacing velcro with Dual Lock, no matter how tempting it is to have the battery held totally immobile.

You can click the battery in, but the battery's not coming out until the bottom layer of Dual Lock pulls off a layer of foam!
I've actually used dual lock with success for 2200-2500mAh 3s packs in depron planes, but what i do is I glue in a wood surface at least half the size of the battery width/length to transfer force better(Popsicle sticks, liteply etc.), and then only use a small piece (roll width by 3/4 inch or so) of Dual Lock to lock the battery down at one end, preferably the rear. The other end is then held in place sideways and in up/down direction by the fuse structure around it. No issues to date. That 3M sticky pad stuff on the Dual Lock sure isn't coming off anything it's stuck to, that's for sure.
Not that i would regard Dual lock as cheap at all. But at least this way a roll does go a long way, though.
Last edited by DKChris; Jul 08, 2019 at 02:00 AM.
Jul 08, 2019, 02:33 AM
Registered User
PaulB's Avatar
About the alcohol thing.......

Only fairly recent (year or 2) that I have known that it releases hot glue like it does which has led me to use more hot glue as a result in areas where I may want to remove or change something (servos).

So, servo stripped but hey, who cares because I can use alcohol to get it out so that I can replace it, right???? Paint brush to apply and a few minutes later I had the servo out and the new one ready to go in. Then I remembered that I had applied a bucket full of alcohol to where I wanted to glue the new back it, dohhhhh. Kept rubbing the area with paper towels then left it overnight and the glue seemed to stick as usual. Now, since then I have been getting progressively lazy and now just give the area a quick wipe, leave it 5 minutes or so and stick the item back down, seems to work fine.

So Guys, as people 'in the know', does alcohol contaminate by penetrating the foam making that area unstable for hot glue or does it evaporate leaving the foam free to glue???? My practical experience indicates that the alcohol flashes off but it would be nice to know for sure....

Paul
Latest blog entry: Just To Say Hello.......
Jul 08, 2019, 04:29 AM
Danish? Don't U eat that??
DKChris's Avatar
As far as I can tell it just evaporates, if used on depron. Depron doesn't take up water either, so this is pretty much what i would expect.

I'm not sure about EPS (beaded polystyrene foam).

Avoid denatured/methylated alcohol on foam, though. These can contain acetone or other solvents that might be bad for polystyrene. Which solvents can be a bit tricky to figure out, though.

I use Isopropyl alcohol (Rubbing alcohol), as it's fairly pure and works just fine without reacting with the foam.
Last edited by DKChris; Jul 08, 2019 at 07:35 AM. Reason: Nonsense
Jul 08, 2019, 06:07 AM
A Day @ a Time - Matt. 6:25-34
ruff1's Avatar
Rubbing alcohol is good on fan fold foam, I wiped it off and almost immediately put the Velcro on.

I still have about 18 sheets of the stuff left in a bundle I bought in 2010.
Jul 08, 2019, 06:28 AM
Registered User
PaulB's Avatar
Quote:
Originally Posted by DKChris
Careful with the alcohol if using hot glue for the assembly, though. Alcohol will release the grip of the hot glue and make it brittle (as most of us already know). Clean by rubbing with a lightly wetted rag or paper towel, kept well away from any hot glue, don't try to pour on even a few drops, you'll never know where it goes.
Quote:
Originally Posted by DKChris
As far as I can tell it just evaporates, if used on depron. Depron doesn't take up water either, so this is pretty much what i would expect.
So are you saying rubbing alcohol is OK but not methylated ???
Bit confused....

Paul
Latest blog entry: Just To Say Hello.......
Jul 08, 2019, 06:36 AM
Too old to rock-n-roll...
TooJung2Die's Avatar
Quote:
Originally Posted by solentlife
Another trick for Velcro ...

Apply UHU Por to the area and spread evenly and thin ... let dry. THEN apply Velcro - the Velcro adhesive then grabs better.

For anchoring Velcro ... especially in areas that are hard to get or subject to dirt / wet externally ... strips of glass fibre tape across the ends of the Velcro stop the end from lifting when removing battery.
A trick I learned at work for attaching anything self-adhesive (like Velcro) to a porous surface. Spray some aerosol adhesive like 3M on the surface first and let it dry. It will stick like death. Good luck trying to peel it back off without damaging something.
Jul 08, 2019, 07:18 AM
Registered User
I put contact cement on the surface that I am going to mount the Velcro.


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