On 3/16/2014 12:12 PM, Tim C wrote:
> We are scheduling a workshop for this upcoming Tuesday, March 18th. There may be a couple of things happening this Tuesday. We will have a tester available to see progress of existing mirrors. I think we are going to take a look at a 10" mirror to see its shape right now. This will dictate which direction to take looking forward. As we have somewhat of a knowledge of this mirror, I believe it may be suggested to first take it back to a sphere, then work on figuring the mirror to a paraboloid shape. For now we will get a great idea of the shape. Stroke shapes, duration of strokes to use to get back to a sphere will be suggested.With vast knowledge available to you from our experts, suggestions may be made to guide the figuring to a parabola right from this state of the wavefront! It's really tricky to do this though. If you are not familiar with figuring, it may be best to go directly back to a sphere. Then, after becoming more familiar with the feel of the pitch over the mirror, you will feel more at home and figuring a little more understandable. For those of you that wish to know more about figuring, you may not want to miss this. Unfortunately, I will most likely not make the class this week due to a busy workload. If I can get there though, I will be grinding on our donated 8" one last hour before I go to polishing. It seems like our little workshop is doing magnificently well. Please feel free to join in if you want!
> T
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