I have this vaccum pump wich stop working…
the arrow (in red) shows the tube tha “sucks” the air, wich before easily did it…
I, in all the pieces put glue to seal all the holes.
she still does not pump enough.
the pump “rubber” still works…
any ideas to help this machine or anyway to maintain her???
It seems that the hole that sucks the air seems to be… like…stuck…
Does the motor sound like it’s working? Did you maybe suck some resin through the vacuum line? Looks like a pretty easy disassembly.
Start by removing the vacuum tube. You might have a foreign body or resin stuck in there. Small motors generally wont start under vacuum lock. Try separating the pump (blue plastic section) from the motor. Make sure the motor works by itself.
Take apart the pump section and see if the diaghram has a rip in it or maybe resin inside.
You don’t have anything to lose at this point by taking it all apart. Sometimes the problem is obvious.
NO… the diaghram is “old”, but the machine is working easily.
the tubes are new.
the respiratory hole on the left side seems to be full of something, but it´s clean … and when i put my finger it doesn´t get stuck wit the vaccum.
it´s wierd…
the respiratory (the left blue hole) i belive I´m going to make a bigger hole…
Hi luis -
As with all air compressors and vacuum pumps, there is an inlet and output. You can often convert a compressor to vacuum and visa versa.
The hole on the left should be pushing air out if the black tube (shown by arrow) is connected to vacuum?
Not sure what you mean… “the respiratory hole on the left side seems to be full of something, but it´s clean”
If it’s full of something, it may be clogged and that would block the whole shebang = no vacuum. There is sometimes a foam filter to reduce noise or keep out foreign bodies. You should feel air pushing out. The black tube thing should be the vacuum side, correct?
Completely correct !!!
mas strange as it seems this “hole” was never used and it´s a little broken…
before it was very easy to suck the air, but now it simply takes a eternity to reach the 8…
as I put my hand in this left “hole”, she does´nt suck as before…
the most certain is that I´m going to make a hole (a real one) an then I´ll put something to stop the dust…
You might have a hole or crack in the diaphram. This would allow the motor to run perfectly, but not push air under pressure. I would assume that if the air line hole worked fine before, and there is nothing blocking it, then you have another issue. Just making the air supply side line bigger wouldn’t increase the performance that much.
What kind of pump is that, is it an oilless continious run model? it kind of looks like a Jabsco water pump off a boat, or a bait tank pump.
That´s an electric pump of 220 V.
I saw the diaphram and it´s old, but not with holes…
I´m going to make a real hole in the left tube to see what it happens… if not I have to use an refrigerator motor, wich I have, but I dont wan´t to use…
Is there any kind of pump that can handle 10 hours working that I can use???
Luis,
I use a Gast medical pump #704. I bought it on e-bay for $60.00. It’s made for continious running…round the clock, 10 hrs is nothing to these little pumps, and sucks up to 28 lbs but hav a variable valve so you can dial it way down to 5 lbs. The other side that blows can be dialed in too, so you can use it for an air brush pump, or fill up a volleyball…maybe even a car tire in a pinch. Very useful to have around the house.
Hey it’s made for medical use…life and death stuff. if your just doing 1 board at a time it works great, and it takes up hardly any space.
do you need max vac? what are you vacuming? skins to eps only need a little pressure like 0.2 bar or so…
i had a real old pump that couldn’t handle more than 0.3 bar but really a myriad of boards where made no problemo…
something somewhere may simply be leaking, heck that means you don’t need a bleeder…
Do you can tell me a dealer for Europe, or the trademark???
thanks!
Is for making two things:
One board made by myself (the only one, I assure you, because I believe the shapers must live…)
and for Rc sailplanes wings.
in these kind of wings sometimes we must go to 8 or 10 bar to have pressure enough to hold 175 mph… its fast and they breake also… (very light and strong construction!)
for example: one wing of 3 meters long, 25 cm wide in the middle e 15 cm in the point can hold easily one person weight of 100 Kilos…
Full PVC/carbon skin, composite, wood, PVC, carbon spars, etc, etc…
If the boards were made like this, propably the shaper would work only when the surfer was tired of his board…
You do not want to buy one of these new.
You want to find one of these (lightly) used on euro ebay or similar sites.
The manufacture’s name is Gast
The model number I am using is DOA-104-AA
I got mine for about 80 bucks including shipping.
Thats pretty cool stuff Luis.
I really should read through those forums abit more, there are probably many tricks that can be used for surfboards.
The problem with surfboards is that they have to be completely water tight, and they have a person jumping up and down on them whilst in use, as well as wave forces.
And the biggest problem of all - they have to be cosmetically perfect!
This adds so much weight, just to achieve good looks! Surfboard making is the only thing I can think of that required such high levels of cosmetic finish at the same time as all the other requirements.
I could save a pound in weight, (about 1/5th the boards weight!), but it would look like crap, and might not be very waterproof!
Sorry to side-track your thread, but this stuff is interesting
I´m showing just some ways of construction; it´doesn´t matter if it is a plane, a boat, a board and so on…
these kind of constructions always must be made with a vaccum pump, epoxy, fiberglass, carbon, etc… and these are the common´s parts of everything !
for instance: one of the better construction I know, and I still don´t know why…, is the windsurf hull, because is big, light and very resillient, but expensive…
on the other hand the wings construction are very, very expensive and very difficult to make, wich demands a very trained and very experienced technician to work with this…
The care that a person must have because of water tight, is actually solved with the windsurfing construction techniques !
Exactly, I agree!
The techniques I use to build my boards are pretty much windsurf construction techniques, just adapted for surfboards and advanced however possible.
Good fun.
Hahaha reminds me of a videos that have been taken by a few people on this site…
How much does that weigh?
So is it carbon fibre, and what is inside, foam? or is it hollow?
Can you give any basic information on how they are made?
here it is:
http://www.dynamic-soaring.de/ds_diva.htm
it has a very strong spar all over the wing to support the G´s…
it´s hollow, the bottom is made separately from the top and then they are glued together on the criated bases (the front of the wing, the spar and the back of the wing)
this is one of the ways of making this, because I have one of these wings, made in EPS (30 Kg/m3 !!!), covered of carbon tissue (all bagged); it´s made like a windsurf board and it´s also very resilient.
See also the other models, and videos…