130611

130611 SBAU Telescope Workshop June 11, 2013
attendees:  JerryW, EdK, TomT, DmitriiZ

JW- Newt for the Web (JW working on mirror 18” f3.9) from Stellafane http://stellafane.org/tm/newt-web/newt-web.html is used to predict 75%, 100% illumination.
JW- PHD software “press here dummy” star tracking, from stark labs software,  includes periodic error correction http://www.stark-labs.com/phdguiding.html .
JW- He has Vixen GPD Super Polaris mount, designed/made in Japan http://www.vixenoptics.com/ .
DZ-polishing his 12.5” w Cerium Oxide, setting pitch tool for a few minutes with gallon water bottle on top.  He is using center of tool over center of mirror strokes w/ random movement around the mirror and turning of the tool and mirror.  JW says Iron Oxide used to be used for polishing.  http://www.willbell.com/ATMSupplies/ATM_Supplies.htm does not list CeO.
TT- brought in TimC 38pg “Crafting a Mirror” (not finished) presentation for viewing.  Possibly will be used at Tinker Festival July 21.
JW- explained knife edge test and zones to TT using TC presentation pages.
JW- said that he took issue with Stellafane instructions on removing a raised edge, but Stellafane replied that they had to keep some steps to make it easier to understand for new users.