I'm building a 12.5" dob, using ideas from several different sources. The 9-point mirror cell is based on Kriege & Berry's design, and has three metal triangles with three mirror support points per triangle. Originally, I was planning to use a sling to support the bottom edge of the mirror, like K&B describe. However, based on some things I've read lately, it sounds like maybe a better method is just to use silicone adhesive to glue the mirror to the triangles. I'm looking for advice one way or the other. Also, if I glue it, should I put something hard (like a bolt head) at the corners of the triangles to provide a support? Any other ideas out there on what to use as the support point under the glue? Thanks very much.
Mirror Cell Advice Request
Started by stuper1, 05/02/2005 04:58PM
Posted 05/02/2005 04:58PM
Opening Post
Posted 05/02/2005 05:32PM
#1
Well, first I wouldn't use a 9-point cell. It turns out that a properly designed 6-point cell will actually work better than the "classic" 9-point design. You might want to download a copy of PLOP to help you design the proper support points.
For attachment, I do recommend using silicone glue. I would put the dabs of glue on the support points, with some spacers on either side (a few toothpicks may work well) and set the mirror on top. Give it plenty of time to cure before you remove the spacers.
For some ideas on how to make the cell, go to either the Mag1 website or the Zambuto Yahoo group and look forpictures of the Portaball mirror cell - it's a very sleek design with a built-in fan.
Jarad
For attachment, I do recommend using silicone glue. I would put the dabs of glue on the support points, with some spacers on either side (a few toothpicks may work well) and set the mirror on top. Give it plenty of time to cure before you remove the spacers.
For some ideas on how to make the cell, go to either the Mag1 website or the Zambuto Yahoo group and look forpictures of the Portaball mirror cell - it's a very sleek design with a built-in fan.
Jarad
Funding Member
