Coffee Hour 101 – May 5, 2022. Woodturners weekly coffee hour #101 for May 5 2022 opened with an extensive discussion of vacuum chucking, following Barry Price’s excellent demo (Monthly Meetings – Lancaster Area Woodturners) at the May meeting of Lancaster Area Woodturners. Then show n tell. Kai on spinning eggs. Clifton with Compwood bent stem for a goblet. Mark’s Laguna in the loo. Flying saucers, walnut platters, and more. Enjoy the full-hour show.
We also extracted Kai’s spinning egg demo with clever spinner, and follow-up test of real eggs versus wooden ones: they all stand up on end, but which end, big or little?
Kai explores spinning egg tops

Dave Bleil continued the discussion of flying saucer starship spinning tops with flashing lights, his notes are available to download (above).

The chats had some useful information:

10:05:30 From Judy Stone to Everyone:
It’s called a Corsi-Rosenthal box. Many videos available. Cost <$100, can be made in ~ an hour.
10:39:49 From Jeff Hankinson, Barrhead, Alberta to Everyone:
I’ve found 1/8″ closed cell foam from the dollar store works just fine as a gasket. Contact cement to attach. Oneway Vacuum adaptor, vacuum pump. My vacuum chucks are ordinary PVC pipe from the hardware store. Rounded wooden ring at the top to attach the foam to. The bases are turned and tapped with a Beal tap. Seal the wood with polyurethane. I put a regular inline gas filter inline for the dust.
10:43:32 From Ray Simmons to Everyone:
1 1/4 X 8 nuts are available @ grainger.com
Also look at McMaster-Carr
10:47:35 From Ronald Sheehan to Everyone:
A jig for #2 taper is easy to make!
10:58:53 From henry to Everyone:
I have discovered “Variable Flow Venturi Vacuum Generators (VDF Series). The website is Vaccon.com and then click on the picture titled variable flow. I’m presently using the Model 200 but I’m convinced the Model 150 would suffice.

Coffee Hour 102 – May 12, 2022. Woodturners weekly coffee hour #102 for May 12 2022 included an excellent discussion of bowl depth and thickness gauges, vacuum chucking, new respirators, and considerations for dust control in the woodturning workshop, plus a turned tetrahedron using rare earth magnets, a nod to sacred geometry, regular polyhedra, and the five Platonic solids, Enjoy the full hour show. 

The chats had some useful information:

10:02:35 From Rich to Everyone:
I use a low-end camera system for hollowing.  The notes about mine are at:  https://sharpeninghandbook.info/shopnotes/
10:07:36 From Rich to Everyone:
That system I’ve noted is very affordable.
10:16:19 From Michael Brazeau to Everyone:
I have a homemade Jamieson system.  For the overhead camera arm, I get a lot of vibration using a wooden dowel arm.  Does anyone use say 1/2″ cold rolled steel arm with more mass? Does that damp out vibration?
10:17:48 From Stew Bremner to Everyone:
Sorry got to go got an appointment to go to. Thanks John. Love the show.
10:22:51 From Mike Peace to Everyone:
I used 1″ aluminum shower rod for my first Jamieson style hollowing system to mount a laser on.
10:24:16 From Randall Smith to Everyone:
These are the addresses for the Freedom Pens Project with each branch of the services.
10:24:36 From Randall Smith to Everyone:
Doug for Army
Doug Rowe
4125 N. Kearny Dr.
Prescott Valley, AZ
86314
(602) 501-2878

Jared for Air Force
Jared Semerad
951 Reynolds Rd.
Schenectady, NY
12306

Jim for NAVY
Jim Selby
2220 Winding Creek Ln.
Jacksonville, FL
32246
(904) 887-1925

John for USCG
John Combs
8261 Frank St
Anchorage AK
99518

Ronnie for USMC
Ronald Bonnette
1709 Cleary Ave.
Metairie, LA
70001

Steve for Space Force
Steve Maikell
8560 Garrison Rd.
Falcon, CO
80831
10:37:36 From Sara Crill to Everyone:
Has anyone utilized a dust measuring device when turning to quantify the dust generated and evaluate dust mitigation strategies used in your shop?
10:42:57 From Randall Smith to Everyone:
Recommended World Wide Woodturners on Wednesday night at 7:pm Eastern time.  Go to web site, scroll down a bit and click on “Click To Go to Meeting”.  https://worldwidewoodturners.org/
10:49:22 From Jeff Hankinson, Barrhead, Alberta to Everyone:
Matthius Wandel recently posted a YouTube video on the topic of inexpensive effective shop air filters. He measures particulate counts as part of his procedure. https://youtu.be/rDZ9yUdM2wA   ‘This Old House’ also discusses the topic of Corsi Rosenthal filter Boxes on YouTube
10:49:23 From Mike Peace to Everyone:
https://www.mikepeacewoodturning.com/resources-3/my-woodturning-articles/
10:51:42 From Ken Vasko to Everyone:
https://www.frugalvacuumchuck.com/
10:53:06 From Dave Delo to Everyone:
https://www.ebay.com/itm/203338588761?hash=item2f57eca259:g:looAAOSwLp1gbK-9
10:53:41 From Dave Delo to Everyone:
https://optrel.us/product/e3000x/
10:53:52 From Michael Brazeau to Everyone:
Dylos Corporation dylosproducts.com have a line of Air Quality Monitors.  You want to be able to measure at 1 micron and below level. That is the stuff going into your lungs.
10:58:38 From tim seiber to Everyone:
As a former math teacher and lover of geometry/polyhedrons I now see a new project for me.
10:59:06 From Ken Vasko to Everyone:
Your lucky students!
11:02:54 From Rich to Everyone:
That is really cool!  Thanks for the video also.
11:02:54 From tim seiber to Everyone:
Next up some Euclidean shapes?
11:03:14 From Randall Smith to Everyone:
Next a teseract!