Search found 28 matches

by Cristiano_Machado
Wed Jan 22, 2020 10:54 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Precipitator Failure
Replies: 12
Views: 1642

Re: Precipitator Failure

Hello Alan,

I am sorry about the failure. I use a 30kv precipitator supply without problems. I put all the precipitator under oil and to adjust the voltage I use a small screwdriver. I didnt change the trimpot because of the problems reported before.

Regards,

Cristiano
by Cristiano_Machado
Tue Nov 26, 2019 11:28 pm
Forum: Images du Jour
Topic: putt-putt boat fusion
Replies: 13
Views: 5228

Re: putt-putt boat fusion

I seems that we can find some pictures at google, this was the picture
D97C15DB-4132-4C6C-9740-A4296FAA7E4F.jpeg
D97C15DB-4132-4C6C-9740-A4296FAA7E4F.jpeg (15 KiB) Viewed 711 times
by Cristiano_Machado
Mon Nov 11, 2019 12:18 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Help to improve fusor
Replies: 5
Views: 910

Help to improve fusor

Hello, I would like to share the latest result from our fusor and ask for some advice. Today we could get a stable run at: v: 25000 V a: 1,5 mA P: 40 mTorr time: 180 s Three bubble (the big one is a failure in the dosimeter). Before test IMG_2292.jpg After test IMG_2293.jpg IMG_2295.jpg In our first...
by Cristiano_Machado
Mon Oct 28, 2019 1:31 am
Forum: Images du Jour
Topic: Neutron Club Application - Eduardo Machado & Cristiano Machado
Replies: 7
Views: 2099

Re: Neutron Club Application - Eduardo Machado & Cristiano Machado

Hello, As a father I really like to help my daughter and son to develop new knowledge and to learn by doing. My role is this process is to be a mentor, but many times I have to do the "dangerous" stuff, to guarantee their safety. The fusor was our biggest project so far and I am sure it will be an i...
by Cristiano_Machado
Mon Sep 23, 2019 11:54 pm
Forum: Vacuum Technology (& FAQs)
Topic: Turbomolecular pump troubleshooting (EXT255H with EXDC80)
Replies: 44
Views: 7911

Re: Turbomolecular pump troubleshooting (EXT255H with EXDC80)

Artem, I also have this pump and I suggested to connect pin 2 to pin 5 and 6. I agree with you that this will correct the problem.
by Cristiano_Machado
Thu Sep 19, 2019 11:57 pm
Forum: Vacuum Technology (& FAQs)
Topic: Turbomolecular pump troubleshooting (EXT255H with EXDC80)
Replies: 44
Views: 7911

Re: Turbomolecular pump troubleshooting (EXT255H with EXDC80)

I may be wrong, but it seems that you have a problem on pin 2. I am not an expert, but I believe you should connect pin 2 to pin 5 and 6 (0V).
by Cristiano_Machado
Wed Sep 18, 2019 5:36 pm
Forum: Vacuum Technology (& FAQs)
Topic: Turbomolecular pump troubleshooting (EXT255H with EXDC80)
Replies: 44
Views: 7911

Re: Turbomolecular pump troubleshooting (EXT255H with EXDC80)

Hi Arun,

Can you explain how you are wiring the driver? Are you sure you are using the right pins with the correct input?
by Cristiano_Machado
Mon Sep 16, 2019 12:24 am
Forum: Vacuum Technology (& FAQs)
Topic: Turbomolecular pump troubleshooting (EXT255H with EXDC80)
Replies: 44
Views: 7911

Re: Turbomolecular pump troubleshooting (EXT255H with EXDC80)

Hello, I have one EXT255H, but my controller is EXDC160. I found an old post about the controller and it seems that the manual you are using is for the new model. My model was an old one, and the post recommended the attached manual. It worked perfectly for my turbo and controller. I use just a 24V ...
by Cristiano_Machado
Sat Sep 14, 2019 4:55 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: My progress II
Replies: 40
Views: 15947

Re: My progress II

Hello all, I am working with Eduardo on his fusor, and since the electrical part is more critical, I am responsible for it. After many troubles to get a HV power supply we finally got a solution, we will use the precipitator HVPS. We will use the attached schematic to ground and measuring the fusor ...
by Cristiano_Machado
Tue Sep 10, 2019 1:34 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Precipitator HV Supply Hacking
Replies: 24
Views: 7549

Re: Precipitator HV Supply Hacking

Hello Mark and Rex,

I received my 30kV unit today and I was wondering what is the use of these white connectors? Can I use them to measure the voltage output? I saw your schematic and I understood it can not be used to control the voltage.


30kv hacked.jpg