I build my first Vdg and drew a picture of it is everything ok ? http://www.berstrong.republika.pl/vdg.jpg And I have a question, Does asbestos is good...
... Hi Yes it looks like you have the basis for a VDG, a couple of things that might need a little tweaking though, what metal are you planning to use for the...
I agree with Bob, metal rollers have proven in long term to dust up the inside of the machine, causing a range of problems, including drastically reduced...
... Hi Craig Although I havent tried it, im sure you only need to swap the top and bottom rollers over to reverse the polarity of a VDG. So long as the 2...
Hi Bob, Thanks for the link. While swapping top and bottom rollers definitely IS the way to change the polarity, I was referring to others actual results....
Hi All: Right Craig, On my first VDG I used Teflon on top and Nylon on the bottom and the vinyl impregnated nylon belt material that I've been crowing about. ...
BoB, Upon reading your message, I am glad that someone is thinking "outside of the box", even though corporate bull$#!% has made me come to dislike that...
... Hi Craig I used to use stretchy exercise belts, but due to the fact they tend to jump off the rollers at high(er) speeds I needed to try another material,...
hi all i want ask you..can i use any rubber belt(i have orthopedical rehabilitative belt from sanitary needs) and two nylon roller(one covered with 100% PTFE...
I suggest you consult the not too distant past archives. We discussed belts and rollers ad nauseum and you can probably get a good idea of the experiences of...
i can't find it...pls tell me, will my VDGG work with these materials? I don't have much time because i have to do VDGG to next week.(school project)...thanks...
Phoboss, That sounds like a great combination. If I were to recommend starting materials, those would be the ones. What about motor, support column, terminal,...
I use nylon on the bottom of 2 VDGs. The top roller on one is teflon and the other is white PVC tubing with a hardwood center core. As far as the belt is...
hi i came across a neoprene belt about 3mm thick but it is black in colour.the guy from which i m going to parchase is saying it is pure neoprene can this be...
Thick belts are usually heavier and less flexible than thin belts. Heavy belts require more motor horsepower and tend to lift off rollers due to centrifugal...
Yes, everything Dick mentions is right on, and this is where you get to choose how advanced you want to be in your construction. Making your machine versatile...
Dick, I was just thumbing through the McMaster catalog #111, and I can't seem to find any vinyl impregnated nylon. 5 mils (0.005")sounds extremely thin,...
... Hi Umang, I used to be a big fan of "rubber" belts, but now I use a shower curtain, I have no idea what it is made from but it works twice as well as any...
Craig: I'll go through my files of McMaster orders and see if I can track it down. Dick ... From: Craig Fuller To: VanDeGraaffGenerator@yahoogroups.com Sent:...
Craig: I stand corrected, my belt thickness is .015". I ordered it as Cat # 8810K21 and it was shipped to me as Cat # 8810K123. Apparently they re-allocated...
Dick, Thanks! Problem solved. You have also inadvertently helped me find the thinnest neoprene coated nylon yet! Up to now, the thinnest I could find...
Hi, I'm trying to build my first VDG and was doing a few tests to find the best materials for the belt and rollers. For that I just build a simple wooden...
It's always great to hear that someone has decided to build their own VDG. I like to think we are a unique type of person. I personally have never used any...
Thanks for your quick answer. Yes. I used a DMM. These things usually have an accuracy of 1 or 2% +- 2 digits. But I used the 2V range to measure that current....
I would be suspicious of any digital instrument measuring charging current since the waveform is unknown. Rather than try to view the waveform on a scope and...
Right. The waveform can be a problem. Multimeters really don't like pulses, like from spark discharges. That's why I connected a 0.1uF capacitor parallel to...
I hear you but.....the clasical way to measure current is to place a current meter in series with the circuit. It sounds like you are measuring current with an...
... a current meter in series with the circuit. It sounds like you are measuring current with an instrument that has a 0.1 mfd filter capactor shunting the...
At this point in our dscussion I think the best thing is not to beat this to death. If you are confident in your measurements that's great! The only other...
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