Hello all, where is everyone? I just added five new photos to my album showing little VDG version 1.2. The latest improvements are bearings to the top roller...
After several failed attempts at a VDG , I now am carefully choosing my materials and construction. My problems in the past has be stablility and tracking...
what you should have is a belt that is conforming to the shape of the roller because you want as much surface contact possible for maximum charging, but I...
If the edges of the belt are not touching the ends of the roller then the benefit of the crown will be minimized at the very least and tracking will be tricky...
Hello all, I just measured the top terminal voltage of little VDG version 1.2 to be around 150kV. The short circuit current was 1.1 uA. I am not getting 1.3 uA...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the VanDeGraaffGenerator group. File :...
VanDeGraaffGenerator@...
Sep 21, 2006 1:12 pm
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Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the VanDeGraaffGenerator group. File :...
VanDeGraaffGenerator@...
Sep 21, 2006 1:17 pm
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Whenever I am at Target I always take a quick look to see if they still carry the 14" bowls with the straight sides (look in photos under Craig's, I have a...
Franklin B. Lee said ' The opening which admits the belt to the collector ought not to be much larger than half the diameter of the collector and should be...
for the purpose of just getting the highest voltage as possible could you just not put a thick layer of something insulating like latex or silicon on the...
Hi Everyone: Well the humidity is on the decline and it's time to dust off the VDGs for another static electricity season. My small VDG uses an 18" stainless...
I just dug out my machine and I was expecting the worst. I used a variac to start it off slowly just in case the belt was going to give me any trouble for...
Hello ALL, I am new to this forum so I will introduce myself. I am an engineer in Detroit, and my name is Charlie. I have wanted to build a VDG for a long time...
for question 2 it depends on your motor and what charge current you want, slow rpm gives long charging time and maybe now charging at all due to the air taking...
Hi Charles and all: I must be brief.....my PC is doing strange things and my address book just disappeared. Yes I have it backed up. 1. You can get stainless...
Those are all very good questions. You can spend some time going through the archives and find a great deal of info about what others have found (very time...
... application until now. I am building a 0.75 to 1.0 MVolt generator, (I think) and need some advice. ... upper drum of Aluminum or Nylon. The belt will be...
Century Metal Spinning http://www.centurymetalspinning.com/ is a good source. For example, a two part spun aluminum dome, inverted entry, 11" diameter for...
Thanks for your replies, I found the calculator in the files section and am going to do a factorial experiment to determine the interactions of all the...
Question From "tjstanton" <tjstanton1953@...> I'm in the Detroit area as well and have been contemplating building a VDG to do particle acceleration....
I have been tossing around the idea that it may be better to make the base of a VDG out of a conductive enclosure similar to the upper terminal. It just seems...
Craig: There are some commercial VDGs on the web that go both ways. I would suggest that the shape of a conductive shroud would be optimum if it were a mirror...
Does anyone have any information on optimal belt length? I understand the desire for wide and fast belts (expressed as square inches per minute contact between...
I think that our homemade VDG are not really usefull with that six roller design, first off there is the problem of the belts touching each other and the huge...
Re: Belt length. Belt length would typically be determined by column height which must accommodate the desired terminal voltage. The problem of opposite sides...
Thank you Elmer and Dick for your info. I wasn't suggesting a six roller design (I think you are right Elmer, way too many complications!) rather I was using...
JT: I am using Nylon for my bottom rollers and Teflon for the upper in the small VDG and white PVC (plumbing style) for the top in the big VDG. The big one's...
for rollers I heard you can also use plexiglas, I am planning to make mine from plexiglas and siliconerubber, I now plexiglas is a bit strange in the...
Elmer: If you are planning to run a high speed belt, I am not sure you can easily cast a solid cylinder and then drill a hole for a shaft AND wind up with a...
Dick the stuff from EMS here is pretty expensive so i am searching a lot for the right materials to make my rollers, since my father has a lathe but it is very...
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