Gray! Good luck with your set-up. Thank you for safeguarding for Hicksy's beer! Hicksy, I'm glad you got your priorities straight. I love exploring dumps - people throw away the greatest junk. I just got a sewing machine the other day.
Packaging style bubble wrap makes good breather material... I'll make sure to post pictures soon... Everybody is trying new things, I'm stoked, I can't wait to see what people come up with.
My local dump has a store. Freon depleted fridge compressors for $3.00 each.
hello Brennan that's great info of how you made the "little sucker". the more methods we post the better the choices will be for the prospective swaylock vac enthusiast.
as you illustrated on Keith Melville's R/C (radio control) thread all the info is already out there, but unfortunately very little is in the hands of the board builders who are clinging to traditional methods (not that there is anything wrong with enjoying tradition). Keith's R/C thread
i chose to go with an off the shelf pump coz i made a conscious decision to make that aspect of sandwich construciton easy for myself, but i can see how much pleasure and satisfaction can be gained from making your own vac setup. Fridge pump would be nice and quiet too. Regarding heat buildup, i place a table fan next to my pump.
i did however construct my own hotwire bow. The dimensions/tension I came up with shown on this page. bow dimensions and other stuff
although the acceptance of the new technology has been dissappointingly slow, i agree that it does mean we are in quite an exciting era - so many ways of doing it and a convention hasn't been established, so its going to be interesting to see what ppl come up with.
i look forward to seeing your pics, i'm about 2 weeks away from getting my latest project in the water. Final bog tomorrow then start painting. After that i'll post pics too
hi Mr. J, I agree - I think it's great everybody is interested in trying something new... and you're right, if board builders will look around them at what others are doing outside the surfing world, you'll find some neat stuff. I almost bought vac set-up similiar to yours from Aerospace Composites.
I read your post a long time ago when you vac'ed your first board with that system... thanks for taking the time to write as you went - very informative.
Another note on heat build-up, the fan sounds like a good idea. I haven't tried this because I don't need more than 24" Hg, but people are putting fridge compressors in 5 gallon buckets with a little water in the bottom - a cooler compressor is more efficient and will draw a higher vacuum (if you try this, please be careful not to electrocute yourself!).
Also for anybody else out there, if you want your pump to have a longer life and not have to run continuously you can build yourself a set-up, like Mr. Js, like this:
***If your pump is powerful enough to restart under pressure... you won't need a Mac valve and sub-reservoir. The the vacuum controller is adjusted for your desired pressure and wired to your pump to turn it on and off. You can get the vacuum controller for about $25 and a check valve for about $13. You can use anything solid for your reservoir... schedule 40 PVC, an old fir extinguisher, etc. I bought all the components for my set-up at www.veneersupplies.com - Joe there is great.
one step at a time..... swaylocks is ushering in a new era of board builders... lovin it.
So I have looked at the "Vacuum Veneer Press" article (how to make instruction) from [url]http://www.veneersupplies.com/]/url] (look at the left side of the page) and they suggest 4" pvc. Article from site linked above: http://www.joewoodworker.com/veneering/welcome.htm
Does anyone see a problem with using 6" sched 40 PVC? I already have a bunch of 6". Will the extra diameter make it too week?
Any suggested deviations from the plans described at Veneer Supplies?
How much resevior is recommended for bagging 2 boards at a time?
Note: after you get to the instructions page at the bottom of the index on the left side there is a link to "downloads (pdfs)" this gives you the entire venturi system article in pdf form. Majority of the article is the same for both systems described.
4est, I'm using an old propane tank but I think it's overkill unless you have a real leaky bag...
this is what Joe said when I asked him about the 6" PVC : "6" Schedule 40 pipe should be no problem for the system but I wouldnt go any larger than that.The size of the reservoirs is based on how often you want to hear your system cycle on and off. I use twin 4" tanks that are about 15" long and my system cycles every 20 minutes on a 3 x 4 bag."
John, I hadn't noticed that... after looking into it though it seems that when manufacturers say 4" they mean 2-3".... with a variable resistor in the right location it may be possible to fine tune this... I'm looking into it...
What is a MAC valve and where do you find that and a vacuum controller?
Personally I'm always ready to learn, although I do not always like being taught. - Winston Churchill
If you are using a vacuum pump... you only need a MAC valve if you are turning your pump on and off to extend the life of your pump and the pump is so weak that it does NOT have enough power to restart while under vacuum... I have never needed one... all my pumps, even the weaker fridge ones have not had trouble restarting under vacuum... especially when pulling less than 15"Hg.
As for the vacuum controller... I bought mine here... http://joewoodworker.com/catalog/product_info.php?products_id=58
all the best, Brennan
edit: forgot i posted that picture above... if you are looking at that... you probably do NOT need the MAC valve or the sub-reservoir.... thats only if your pump is very weak on start-up. again, not usually the case... I've never had to use a mac valve or a sub-reservoir.... sorry for the confusion...
I've been thinking about all this vacuum stuff and I'm wondering why it isn't possible to simply use a one-way valve and suck the air out (with a vacuum cleaner, hand pump whatever) to the pressure you'd like and then be done with it (like we do for skateboards). Why is there a need for the pump to come on and off? Is it because of the massive size of the bag making it really hard to get a totally air tight bag that won't leak?
Sorry for such a silly question.