... a sphere ... Hi James, I hope you are well and your "mirror challenge" successful(I follow most of the mirror-making groups). I hope it will remain a...
... For production work we always polish with a full size lap using the standard 1/3 width stroke centered left to right on the mirror. We stop the machine ...
... already. ... you take ... there? ... Thanks James for the info on polishing, I have a plan to follow now. I've worked alittle more on the sphere with the...
Hey group: I've put another 16" x 3" mirror blank up for auction on eBay. Here's a link if anyone is interested. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem ...
... Hello James, Please take a look at my latest ronchi photos under "John A's" photos in this group when you get some free time. They are dated 9-7- 04, one...
... Immediately channel two 90 deg escape routes for trapped air bubbles after the pitch will keep a shape, but before you attempt to press. ... Reheat with a...
... poorly ... bubbles after ... within a ... Thanks for the advice Mel, I thought I'd experienced most mishaps during the grinding of this glass(other than...
Ugly holes in yer pitch lap? Fill 'em in with a few drops from a chopstick and then... smooth the area with light application of flame from a blowtorch. If...
John: I apologize for taking so long to get back to you. I looked at your Ronchi images. Yes, this looks like a good place to start. The important thing is ...
... Ronchi ... thing is ... is high ... recommend a ... some images ... E-mail ... Hi James, Seeing as this is not a salary-paying position for you -helping me...
John: I'll E-mail you a set of runs to start with this evening. Remind me; what is your mirror's focal length? James James Mulherin Optical Mechanics, Inc. ...
... me; what is ... Hi James, The center of curvature from my knife-edge tester reads 149 10/16" (149.625"). This is where the image blacks out evenly when...
... Ok. The first set of runs will all be center over strokes made with the 50% tool. There are two types of stroke. One deepens the center, the other puts ...
I was a little nervous even before a mountain lion carried off my neighbors goats. It jumped over an 8' high fence while carrying them away. That's pretty...
First you must file an environmental impact statement with the animal rights and the Sierra Club people. Then you can leave poisoned meat laying around and...
... series of ... this set ... before and ... Also, ... blocks of ... Ok James, I've posted 2 graphs of the surface error of my 16" under "John A's Photos"....
John: I like the white version best. I don't have the option of viewing an enlarged image. I think this option is only available to the owner of the folder. I...
... Sorry about you dog Ben. :( I too deal with four-legged predators in the areas I frequent in the dark. Here are my realistic suggestions: 1) Dogs are...
P.S. When/if it comes down to it practice the 3 S's: Shoot, Shovel, and Shut up. There are some folks these days that have the misguided opinion that animals...
... of the ... section so I ... Ok James, I've reposted the glass surface error graph in "John A's Files" Folder in this group. It is a jpeg of the white...
This is a link to an informative web site I found regarding materials and methods for polishing and grinding: http://us-products.com/sitehtml/lappingabrs.html ...
John, James... Thanks for keeping this on the ATM_FREE Group site... I think there may be many silent readers out there keeping an eye on John's progress with...
I've got a 95 lb. Lab and .45 Super Pistol. The Lab is there to scare the critters away and give warning. The gun is to protect the Lab ... Clear Skies, ...
i prefer the 12 gauge pump with the short brass shells. those high brass magnums are too rough on my shoulder. number 4 gives a handfull of BB's nice...
Hi William I have a picture of a homemade par.bino.mount, It is really quite simple to make as long as you make the moving connecting joints,the vertical and...
