Search found 757 matches

by Jerry Biehler
Wed Jan 17, 2018 3:32 am
Forum: Vacuum Technology (& FAQs)
Topic: Double-Checking Diffusion Pump before Buying
Replies: 4
Views: 72

Re: Double-Checking Diffusion Pump before Buying

It's just a standard 3" ASA, no big deal.

As long as it is complete and the heater works you will be good to go.

I get my cast aluminum tooling plate from these guys. great prices.

http://www.sandsmachine.com/alumweb.htm
by Jerry Biehler
Mon Jan 15, 2018 2:55 am
Forum: New User Chat Area
Topic: Serial communication
Replies: 12
Views: 331

Re: Serial communication

The power supply and the arduino are probably connected together through the ground pin for the serial. Unless it is internally isolated, which I really doubt.
by Jerry Biehler
Sun Jan 14, 2018 6:52 am
Forum: New User Chat Area
Topic: Serial communication
Replies: 12
Views: 331

Re: Serial communication

readstring may be timing out before it gets a response. Use Serial.available() to check if there is anything in the serial buffer before trying to read it out. Then do an if statement to read it in. You also might want to be using a Serial.write instead too. This is an old program I have for running...
by Jerry Biehler
Sun Jan 14, 2018 6:38 am
Forum: The Trading Post
Topic: Vacuum Throttle Valve
Replies: 9
Views: 250

Re: Vacuum Throttle Valve

I should be easy to make an adapter. You can use rubber seals to mate to iso fittings from conflat.
by Jerry Biehler
Sun Jan 14, 2018 6:36 am
Forum: Images du Jour
Topic: Arc polarity for fusing wire?
Replies: 6
Views: 217

Re: Arc polarity for fusing wire?

When tig welding on old transformer based tig machines where you had to ball the electrode you set the polarity so the electrode is positive. This put's all the heat into the tungsten electrode which allows to ball the end. (Modern inverter tig machines use pointed ceriated electrode, no more balling)
by Jerry Biehler
Sun Jan 14, 2018 6:31 am
Forum: Vacuum Technology (& FAQs)
Topic: Question About Design Trade-offs for Backing Pumps
Replies: 20
Views: 437

Re: Question About Design Trade-offs for Backing Pumps

Oh, and yes, your adapter should work fine.
by Jerry Biehler
Sun Jan 14, 2018 6:30 am
Forum: Vacuum Technology (& FAQs)
Topic: Question About Design Trade-offs for Backing Pumps
Replies: 20
Views: 437

Re: Question About Design Trade-offs for Backing Pumps

Yeah, send me a message and we will get this thing going.
by Jerry Biehler
Sat Jan 13, 2018 10:31 am
Forum: Vacuum Technology (& FAQs)
Topic: Question About Design Trade-offs for Backing Pumps
Replies: 20
Views: 437

Re: Question About Design Trade-offs for Backing Pumps

Here's what I found, You will have to make a plate plate that goes between this and the DP since both have o-ring grooves.

https://flic.kr/s/aHsmckNkwf

It's $20 plus shipping.
by Jerry Biehler
Sat Jan 13, 2018 10:25 am
Forum: The Trading Post
Topic: Vacuum Throttle Valve
Replies: 9
Views: 250

Re: Vacuum Throttle Valve

Like I said, it is a ISO-100 flange.
by Jerry Biehler
Fri Jan 12, 2018 10:50 pm
Forum: The Trading Post
Topic: Vacuum Throttle Valve
Replies: 9
Views: 250

Re: Vacuum Throttle Valve

That is ISO-100