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PCL air connectorsPCL air connectors Does anyone know if PCL connectors can be used for vacuum or do they need internal pressure to seal??
Info on running 3 phase motors on single phase supplies here:- http://homepage.ntlworld.com/bob.minchi … Issue2.pdf
Re: PCL air connectors If you can connect the pair of connectors to an air line with no regard to flow,I would imagine they are ok on vacuum. If you think about it putting the large female part on the air tool and the male part on the pipe from the compressor is same as applying vacuum with the connectors reversed. Having said this I've got my doubts now ! I think also it will depend on how much vacuum you propose to use. Have a look at vacuum bag press systems and see what they use.
My world still turns on a Colchester lathe
Re: PCL air connectors Thanks Ashley,
Info on running 3 phase motors on single phase supplies here:- http://homepage.ntlworld.com/bob.minchi … Issue2.pdf
Re: PCL air connectors Bob.I made a vacuum bag press. I had two problems well one really my vacuum pump ran all the time and got a bit warm and I worried that it would give up before the glue set,I wanted to get a vacuum switch so it would turn on & off to maintain the vacuum, I never did but a bleed valve may well have worked. The bag I made out of heavy duty polythene sheet sealed with duct tape for the permanant joins and rolled on to two batterns and clipped with large spring clanps for the work entry end. I used a car inner tube valve with valve bit removed and cut from the inner tube with about a 6" circle of rubber attached to make the vacuuum entry I think I glued it to the inside of the bag with evo stick. The bag part is almost self sealing so joins are not much of an issue however holes in the polythene were. The base board was MDF with 6mm machined grooves to allow the vacuum to spread evenly. Most of my ideas came from a Fine Woodwoking book on veneering that I picked up in the States. I'm on holiday now ( its raining !)but can get you the ISBN once I'm home. AS I said I gave up because of the vacuum pump, I will try again one day when a project needs it but I find veneering flat surfaces easy enough using PVA and a hot iron.
My world still turns on a Colchester lathe
Re: PCL air connectors Ashley, you can make a simple cut-off using a vacuum advance unit off an old car distributor and a microswitch. I got the idea from a magazine article on epoxy-veneering model aircraft wings in a vacuum bag. You mount the advance unit to a small bracket and fit the switch so it opens by a fitting on the pulling-arm at your desired vacuum. It's a very simple arrangement.
Re: PCL air connectors Interesting idea Pete!
Info on running 3 phase motors on single phase supplies here:- http://homepage.ntlworld.com/bob.minchi … Issue2.pdf
Re: PCL air connectors Pete Excellent, the water fill shut off valve from a washing machine was suggested to me but the advance & retard idea seems easier as the vacuum "pressure" is higher than the water fill valve which I think are also pressure not vacuum operated.
My world still turns on a Colchester lathe
Re: PCL air connectors Ashley Slater wrote:
Indeed the water shut off valve operate at a few inches of water (positive pressure) for obvious reasons.
Info on running 3 phase motors on single phase supplies here:- http://homepage.ntlworld.com/bob.minchi … Issue2.pdf
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