开云体育

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of David Kuhn
Sent: Thursday, May 02, 2019 9:50 AM
To: [email protected]
Subject: Re: [TekScopes] Compressed air

" Your idea is correct, the large belt driven compressors are the best and places like Harbor Freight has them brand new for a reasonable price. "

Yea, I have been tempted a few times to use the 25% off coupon to get one, but I usually do not hear good things about there electrical tools.

There is an elderly lady down the block that we are friends with. Her husband (dead 20+ years now) has one of those six foot belt driver compressors near their garage door; I think it is hard wired. She might use it once a year. When I turned it on, it was amazingly not deafening.
It looks like it was built very well. I can't get her to give it or sell it to me - lol. I kind of pine for it. It is very old, but still works great and I am sure built better than anything harbor freight has. Anyway, I'm not sure I should offer much because of its age and I might be better off with a new one. They probably all need the pressure/electric switch changed every few years and I am not sure where to get that part. My original one in the dog house, probably 29 years old now and still looking nice, needs that pressure switch. I could never find the MFG parts list and you wouldn't get one from them after all these years. I haven't found generic ones either. Maybe there is generic kits to re-plumb old air compressors? I'll have to look.

Sorry, this is off topic, but I feel every electronics repair lab should have compress air. Heck where I worked, before GE moved everything, and our jobs overseas, I used a nice high pressure air line. I could wash boards off with Simple green and then ISO and blow dry them do dry that I could power them up right away without letting them dry overnight. The air sound drove other around me nuts, but you do what you have to do. At one point, maintenance was going to change my compressed air plumbing to the nitrogen line (we had a huge nitrogen tank outside) for the drying of boards, then our closing was announce and no one gave a shite about anything for the next year and a half 8-(. So nitrogen would be better for drying and dusting board than compressed air, but I would not want to foot that bill.

Dave

Dave

On Thu, May 2, 2019 at 11:48 AM Tony Fleming <czecht@...> wrote:

Your idea is correct, the large belt driven compressors are the best
and places like Harbor Freight has them brand new for a reasonable price.
Don't forget the water filtration and drain the water from the tank.
You could make a "self draining" or "automatic" condensation purge
with an Arduino or ESP32/ESP8266 and few more parts to open valve.
But a reminder once a month should give you time to check the system
and drain the water from the tank.


On Thu, May 2, 2019 at 10:24 AM David Kuhn <Daveyk021@...> wrote:

" Because they don't have a "quiet" air compressor. "

That's the biggest problem. In the garage, I built a compressor dog

house

with six inch walls with insulation on all side. Even the access
door is

6" thick with insulation. It worked great, but the air compressor
got

used hard. Well know the saying "out of sight, out of mind"?
That's the problem. It never got maintenance. Now, I just let it
be noisy in the garage as needed. I don't use it that much, so I
just go out and turn it on as-needed rather than let it be
automatic. I would like to have a

huge

tall tank that hold a lot of air; but they can be expensive. I need
to

go

to some auctions and find a six foot tall belt driven compressor
that can run only every so often and let it on automatic.


On Wed, May 1, 2019 at 9:59 PM Harvey White <madyn@...>
wrote:

On Wed, 1 May 2019 14:53:04 +0200, you wrote:

I hear conflicting reports on what one should do. What's your take?
Are there different types where you should or shouldn't?

Compressed air isn't. There's not enough room in the an.

Druckluft 67 (aka Dust Off 67) from Kontakt / CRC says not to
shake the can "or otherwise the fluid might come out", but is it
always the case with all types? What is that fluid for, anyways?

The fluid evaporates, produces gas, and that's what your
"compressed air" happens to be.

I read reviews of some cheaper compressed air products on amazon
and they complained about the quality. What can go wrong with
compressed air?

Liquid for one, which you don't want, and then again, what's the
liquid that's evaporating to give you this "air"?

Two things people brought up were one brand produced very weak
pressure, and another produced flammable rather than inert gas.

Depends on what's evaporating. Butane would work, so would freon,
so would a lot of other things, includin propane.

Druckluft 67 touts as being oil free. Are there other things that
might go wrong?

er..... what's in that liquid?

Why would someone use canned compressed air rather than an air

compressor?

Because they don't have an air compressor. Because they don't
know the difference. Because they don't have a "quiet" air compressor.
Because they don't have the driers and particle filters to clean
up the output air from the compressor (which may or may not have
oil in it from the air pump).

Harvey

Thanks.