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Re: Double sided tape in vacuum
Attila,
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I would be concerned that outgassing from the tape would contaminate your plating. You may well end up with a very large virtual leak. I would suggest fashioning a mechanical system that would retain the mirror, rather than using an adhesive. Dave On 7/19/2012 1:59 PM, Attila wrote:
Hello! |
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Double sided tape in vacuum
Attila
Hello!
I need to recoat two small mirror. One of them is 15mm diam and maybe 20gramm, the other is 24mmx36mm also very light. I have no idea how can I put the face down to the planetary holder. I thought maybe I use tesafix® 62855 double sided tape. Which can hold the mirror. Anybody tried such a way to hold mirror in the chamber? BR Attila ³§³¦³ó²Ô¨¦ |
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Re: New washing detergent for mirrors prior to aluminizing
On 07/12/2012 01:03 AM, Guy Brandenburg wrote:
A friend of mine suggested Alconox as a new cleaning agent for use onI second this recommendation. I've used Alconox for years to clean lab glassware and related items. It's good stuff. -Dave -- Dave McGuire, AK4HZ New Kensington, PA |
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New washing detergent for mirrors prior to aluminizing
A friend of mine suggested Alconox as a new cleaning agent for use on mirrors prior to aluminization. I have tried it and found that it seems to work many, many times faster and more effectively at producing a mirror that the water flows off of like a sheet. No other detergent comes close. Nobody paid me anything for this testimonial; I don't know if anybody on this list has tried the stuff. ? Guy Brandenburg, Washington, DC? http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================ |
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Re: Back in business
JerryM
--- In VacuumX@..., "JerryM" <gandamiller@...> wrote:
As I said on to coat mirrors. I just uploaded a photo of the setup in my bell jar. The mirrors have a small radius and would not coat on the edges. That is why there is a small motor inside to turn the mirror during coating. this setup is very successful. Jerry |
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Re: Back in business
JerryM
oops,
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Still had a problem where it wouldn't pump below 100 microns. Upon examination I found that air was trapped in the high current feed throughs (yes both of them) Hopefully cutting a relief channel will solve this problem. I am pumping as I write. Jerry --- In VacuumX@..., "JerryM" <gandamiller@...> wrote:
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Back in business
JerryM
Okay, I have been having trouble achieving a suitable vacuum. Today i replaced the o-ring seal on my diffusion pump. While I had it out I found the nameplate that said "use 50cc of DP oil. When I poured it out (much spilling) I discovered that I had way too much. Probably 100cc.
After adjusting the quantity the pump worked like new. I got to 10X10-5, without using the cold trap. I am sure that with the cold trap I will do much better. On to coat some mirrors. Jerry |
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Re: Polishing an Aluminum Base Plate
JerryM
I have had success using a rubber gasket under my bell jar. I coat the mating surfaces with a light coat of vacuum grease. I have also used soft wax (from a plumbers toilet seal) with success. Rubber sheets are available from industrial supply houses. I just cut up a smooth truck inner tube. The small ridges do not cause leaks. If my bell jar had a wide flange I might try just the wax. Some stock rubber sheets have fiber or cloth imbedded, this would not be desirable.
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Good luck. Jerry --- In VacuumX@..., "Thomas" <mayfieldtm@...> wrote:
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Re: Aluminizing
I suggest not using your plasma discharge cleaner system ( if you have one ) as out gassing of plasticizer from the plastic may form soot if exposed to plasma.?
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Drew in sunny Florida -------------------------------------------------------? On Sat, Mar 3, 2012 at 6:01 PM, Guy Brandenburg <gfbrandenburg@...> wrote:
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Re: Polishing an Aluminum Base Plate
Paul Anderson
Is it more important that it be flat or shiny?
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On 2012-03-04, at 10:44 PM, "Thomas" <mayfieldtm@...> wrote:
Just finished machining a 6061 Aluminum Baseplate for my Bell Jar. |
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Polishing an Aluminum Base Plate
Just finished machining a 6061 Aluminum Baseplate for my Bell Jar.
It's 14" in diameter by 1" Thick with a 4" hole in the center and drilled for a Conflat. I've yet to decide what type feedthroughs I'll be drilling holes for. It's the first component in my Vacuum System project. I turned it to as good a surface finish that I could muster, but still would like to finish it to as near a mirror surface as possible, regardless if that entails more machining or hand polishing?? It is darn close now, but, needs that last little Phuttt. Any suggestions? I'm thinking you guys resurface or polish you pump-plates now and then. Tom M. |
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Re: What is a "Centering Ring", How is it used?
Thank You Mr. Chutko.
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It's all clear now. I have a much better idea on how to proceed. I'll be back! (fair warning) Tom M. --- In VacuumX@..., Vladimir Chutko <chutko@...> wrote:
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Re: What is a "Centering Ring", How is it used?
Hi Tom,
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You are on a right track! Look at , and you'll see how internal and external centering rings should be installed. Walk through the MDC Vacuum Product online catalog and you'll find a lot of other useful information. Good luck! Vladimir Chutko On 2/15/2012 7:55 PM, Thomas wrote:
Hi Y'All! |
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What is a "Centering Ring", How is it used?
Hi Y'All!
Newby here. I attempting to put together a Vacuum System using a junk box full of various Vacuum parts. I have two ISO-100 Flanges that I want to mate together. They are just smooth flat surfaces 4"ID and 5.1"OD, no grooves for O-rings or anything like that. I'm finding in the Catalogs Items called "Centering Rings" and "Sealing Disks". Are these the same or different animals? At 'LDS Vacuum' I've found ISO-100 Centering Rings for about $25 and a ISO-100 'Aluminum Outer Ring' for $5. I don't understand just how the Outer Ring would be used? Am I on the rite track? Any clarification would be appreciated. Tom M. |
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New Member
Hi: I just joined your group because I'm interested in PVD coatings, and what do you know, the very first message I see on your board is this:
--- In VacuumX@..., AGUSTIN GASPARINI <teveotron@...> wrote: I had to do a (very) little research and discovered: "This is one big scam! It has nothing to do with google search! Their site is very misleading. For just .99 to handle shipping costs they will send you a kit, after which they charge you a monthly fee of $40 to $70 a month without even disclosing it. These guys are brutal! Avoid!!!" You may want to remove messages like this. It may cause some of your members grief. Sorry for the bummer intro, but I'm glad to be here:) |
Dave McGuire
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