DIY Vacuum Fixtures

[EddyCurrent]

Will down pressure from the cutting tool compress the thicker gasket and make Z0 lower ?

[mitchejc]

I'm also very interested in making some vacuum fixures soon so I'll be watching your progress keenly. I have not done any real investigation yet but I guess the thinner the ID of the tube the better because I don't think high flow volume is required and keep tube lengths to a minimum. I mean long thick tubes will need a bigger vacuum tank to handle the initial suction. Not sure but I don't think all types of quick connect couplers that are designed for pressure will seal properly when used for vacuum so maybe just confirm that with the vendor.
I'm curious when you say "compressor", do you mean vacuum pump or will you be using a compressor with one of those compressed air vacuum generators or is there another way?

[mekanik]

Hi Guys
Found some kits
http://www.toolpost.co.uk/pages/Wood...rkholding.html
Regards
Mike

[EddyCurrent]

Compare the price to this; http://www.trend-uk.com/en/UK/produc...make_kit_.html

[mekanik]

Much more better Eddy
That was the first one i found on my search and was going to see if Trend carried spares for the vacuum pad.

[mekanik]

Thanks for that Eddy
Just bought one for the come in handy box
Regards
Mike

[Nthkentman]

Compare the price to this; http://www.trend-uk.com/en/UK/produc...make_kit_.html

I bought one of these...Yet to get enough round tuits to actually make it tho... Wish they'd sent a CNC template idea and not the paper hand router templates :-(

[Boyan Silyavski]

I made some test jig from wood. Works perfectly.

One thing is clear to me now. All hosing from compressor up to the CNC must be industrial 1/4 or 3/8, cause i will step on it, solder over it and so on. It must be strong so no cheap PVC hoses here. Added bonus is that i use the same hoses and extensions like for air. So the only thing i bought is the 3/8 quick connector which i fitted at the compressor inlet side.


Decided to save on connectors :-) so i drilled the vacuum fixture and just pushed the PVC hose inside, it works perfectly. Recessed all the necessary areas 3mm. Drilled hole to the back so the vacuum fixture is self fixing to the table. Hole could be closed and instead fixture clamped.

The mat is non slip mat from chinese shop -2euro. 15mm wide rings, i wanted a superb friction.

Next step will be when i have time to fit the Vacuum switch to the compressor, check the negative pressure achieved and test if using vacuum reservoir/the compressor tank/ is better in any way.

Video : https://plus.google.com/111571569713...ts/BHSTDvFBjks

[Boyan Silyavski]

Just measured the compressor suction- 94Kpa = 705 mmHg = 27.7 inHg= 0.927 Atmospheres , not bad for an old sucker

Now i still have the problem about the compressor switching off after 15-20 min of run, without obvious heating. Any ideas? I am going to use the bigger compressor when repaired the gasket, but i want already to use my fixtures . I read on forums people use 8h non stop the compressor without problems for years, why then this old sucker stops?


By the way i have 2 more micro digital vacuum switches, i bought a lot, used , perfect condition, made in japan, very small size, so PM if interested. 25euro each

[GEOFFREY]

Hi Guys
Found some kits
http://www.toolpost.co.uk/pages/Wood...rkholding.html
Regards
Mike

Someone (I think it may have been Eddy) posted some similar kits that Trend had on clearance. I bought two kits, can't remember the price, but less than a tenner a kit. I have not yet tried to make them up as I wanted them for my other router re-build which is still a project - not yet started!!! G.