HackerSpace meetings
dave walton
meeting tomorrow (Thursday) for anyone interested in the hackerspace.
According to my notes, it starts at 7pm. If plans have changed, please
let me know.
Touch Supper Club
2710 Lorain Avenue
Cleveland, OH 44113-3470
Next Tuesday (Jan 26th) is an Open Project Night in the old Brunswick
Florists building.
10550 Carnegie Avenue
Cleveland, OH 44106
There is free parking in the lot for that building. The driveway is
directly in front, just west of the sign. Fenced parking extends to
the rear of the building.
I'll be bringing a MIG welder and maybe a plasma cutter to the Open
Project Night if anyone wants to try their hand at it. I have an extra
welding hood and gloves. If you want to try it, bring clothes that
covers all exposed skin. Preferably 2 layers. Sparks are not a problem
with MIG if the metal is clean, but the arc gives off a lot of UV and
will sunburn any exposed skin within moments. Anyone can easily learn
the basics of MIG welding in just a few minutes. My 7 year old niece
and nephew can already lay down a decent bead. I'll bring various
metal scraps and some old brake rotors to play with.
-Dave Walton
Flash312
How thick can the plasma cut? I can bring some sheet metal scraps to play with and I have at least one hood I can take as well.
Andy
dave walton
Looking directly at the arc or it's reflection from a shiny surface can cause permanent eye damage and sunburn within 50 feet. Light reflected from normal surfaces is considered safe. Here is a quote from the OHS site (http://www.ohsonline.com/Articles/2007/02/Preventing-Eye-Injuries-When-Welding.aspx):
Cumulative Damage Risks
All of the most common types of welding (shielded metal-arc or stick welding, gas metal-arc welding, and oxyacetylene welding) produce potentially harmful ultraviolet, infrared, and visible spectrum radiation. Damage from ultraviolet light can occur very quickly. Normally absorbed in the cornea and lens of the eye, ultraviolet radiation (UVR) often causes arc eye or arc flash, a very painful but seldom permanent injury that is characterized by eye swelling, tearing, and pain.
While most welding-related eye injuries are reversible, with more than half of injured workers returning to work in less than two days and 95 percent in less than seven days, some eye injuries are irreversible and permanent visual impairment occurs. This is especially true with infrared and visible spectrum (bright light) radiation. Both can penetrate through to the retina and--although this is rare--can cause permanent retinal damage, including cataracts, diminished visual acuity, and higher sensitivity to light and glare.
I like to have people get in the habit of saying "Welding" and then waiting one second before pulling the trigger on the unit. That allows anyone in the area with their hood up or off to say something before being exposed to the flash. If you are welding and no one speaks up within a second, go ahead. If anyone says anything - stop (don't pull the trigger). When you have the welder, your concentration should be on your work, not the observers.
It is normal to stop and start the arc as you go. Don't assume that it's safe to look or raise your hood when the arc stops. When you are done welding, say "Done".
If you hear the welder say "Welding" and your hood is not in position, say "STOP" immediately.
If you are spectating and see anyone not observing safety precautions, say "STOP" at any time loud enough for the welder to hear.
I'll print up some sheets with basic safety info for Tuesday. Just wanted to give people an idea of what to expect. With some basic ground rules and common sense, it's a very safe hobby.
-Dave Walton
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Rick Pollack
Rick
FLASH Inc.
ic0n
http://www.aearoweb.com/sites/occ/Contact_Us.aspx
Rick Pollack
dave walton
An Auto-darkening hood blocks all the UV and most of the visible light even in the un-darkened state. It is nice not to have to worry about leaving your hood up and accidentally pressing the trigger when lining up the work, or accidentally letting the wire touch and release a small spark from the leftover capacitance even when the trigger is not pressed. Ideally we can have both types on hand and let people try one or both if they want. It is worth noting that ALL the professional welders I know use permanently darkened hoods and not the auto-dark type. That's how they learned, and that's what they use. I'm always a bit wary that the autodark may fail at any given time.
-Dave Walton
Greg Svitak
Sent from my Verizon Wireless BlackBerry
-----Original Message-----
From: Rick Pollack <rick.p...@gmail.com>
Date: Thu, 21 Jan 2010 19:56:25
To: <oh2...@googlegroups.com>; <neo-m...@googlegroups.com>
Subject: Re: HackerSpace meetings
Nice! Thanks.
On Thu, Jan 21, 2010 at 2:45 PM, ic0n <ic0...@gmail.com <mailto:ic0...@gmail.com> > wrote:
I know we won't get time but if anyone is in need of some safety glasses check this site out for a free pair/sample.
http://www.aearoweb.com/sites/occ/Contact_Us.aspx <http://www.aearoweb.com/sites/occ/Contact_Us.aspx>
On Thu, Jan 21, 2010 at 12:49 PM, FLASH Inc. <flas...@gmail.com <mailto:flas...@gmail.com> > wrote:
I will bring 14ga (.072") &/or 16ga (.056") stainless and mild steel scraps. I can also bring heavier (up to 1/4") mild steel as well but most 120V welders work best with thinner gaged material. I won't bring the heavier material unless requested. I have a fixed hood to bring. I have an Auto-darkening hood as well but I feel the reaction time of the lens does not offer adequate protection so if I do bring it I will not let others use it for their own safety. I would also recommend bringing safety glasses to protect the eyes from random sparks, I will bring as many pairs as I can gather.
On Thu, Jan 21, 2010 at 11:31 AM, dave walton <walto...@gmail.com <mailto:walto...@gmail.com> > wrote:
Extra scraps and a hood or two would be great. Let me know if you can bring any stainless scraps and I'll bring the appropriate gas and wire. I like the auto-darkening hoods when welding so people can leave it down all the time and not risk striking an arc with it flipped up (I'll bring 2). Standard ones would be good for observers. The cutter is rated to 1/2", but anything much over 1/4" takes forever to get through and the edge starts getting jagged. I probably will not be bringing it Tuesday because I did not see 240V in the garage area. My MIG unit is small and runs off 120V.
Looking directly at the arc or it's reflection from a shiny surface can cause permanent eye damage and sunburn within 50 feet. Light reflected from normal surfaces is considered safe. Here is a quote from the OHS site (http://www.ohsonline.com/Articles/2007/02/Preventing-Eye-Injuries-When-Welding.aspx <http://www.ohsonline.com/Articles/2007/02/Preventing-Eye-Injuries-When-Welding.aspx> ):
Cumulative Damage Risks
All of the most common types of welding (shielded metal-arc or stick welding, gas metal-arc welding, and oxyacetylene welding) produce potentially harmful ultraviolet, infrared, and visible spectrum radiation. Damage from ultraviolet light can occur very quickly. Normally absorbed in the cornea and lens of the eye, ultraviolet radiation (UVR) often causes arc eye or arc flash, a very painful but seldom permanent injury that is characterized by eye swelling, tearing, and pain.
While most welding-related eye injuries are reversible, with more than half of injured workers returning to work in less than two days and 95 percent in less than seven days, some eye injuries are irreversible and permanent visual impairment occurs. This is especially true with infrared and visible spectrum (bright light) radiation. Both can penetrate through to the retina and--although this is rare--can cause permanent retinal damage, including cataracts, diminished visual acuity, and higher sensitivity to light and glare.
I like to have people get in the habit of saying "Welding" and then waiting one second before pulling the trigger on the unit. That allows anyone in the area with their hood up or off to say something before being exposed to the flash. If you are welding and no one speaks up within a second, go ahead. If anyone says anything - stop (don't pull the trigger). When you have the welder, your concentration should be on your work, not the observers.
It is normal to stop and start the arc as you go. Don't assume that it's safe to look or raise your hood when the arc stops. When you are done welding, say "Done".
If you hear the welder say "Welding" and your hood is not in position, say "STOP" immediately.
If you are spectating and see anyone not observing safety precautions, say "STOP" at any time loud enough for the welder to hear.
I'll print up some sheets with basic safety info for Tuesday. Just wanted to give people an idea of what to expect. With some basic ground rules and common sense, it's a very safe hobby.
-Dave Walton
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Bruce A Wakelee
Someone at one of the 2600 meetings bought afew of my pieces back in the day.
What is it you guys are planning on making? Or are you just experimenting?
-Bruce
Nice! Thanks.
http://www.aearoweb.com/sites/occ/Contact_Us.aspx <http://www.aearoweb.com/sites/occ/Contact_Us.aspx>
-Dave Walton
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J C
Is the 2600 meeting tomorow? Sorry, I'm a dummy.
On Jan 21, 2010 5:48 PM, "Bruce A Wakelee" <pys...@yahoo.com> wrote:
mmm... the smell of burning metal.
Someone at one of the 2600 meetings bought afew of my pieces back in the day.
What is it you guys are planning on making? Or are you just experimenting?
-Bruce
----- Original Message ---- From: Greg Svitak <gsv...@hotmail.com> To: Rick Pollack <rick.poll...
ic0n
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Chris Clymer
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