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I had to remove the tray and make several measurements to try and get the desired focus height (it didn’t work)  The bottles I had where too large to fit under the head and in the focus range of the laser… but it worked anyway.  I measured my tray depth to be 1.349\" so max focus height is 1.849\" and my bottles are 2.23\"… not in range.  I wanted to try anyway so using my previous settings of 950/100% and lines/inch of 340 I got some pretty good results.  Couple of comments, the glass was wavy so further variations in the required focus.  I didn’t use any soap, oil, or coating for cooling as the glass was rather thick.  I did have to clean up the etch with my fingernail, but it still came out as desired, cool.<img src=\"https://global.discourse-cdn.com/glowforge/original/3X/d/5/d5f912eb82d6337ed39ec65bc7262845c44244cf.jpg\" alt=\"GlassBottle_3\" data-base62-sha1=\"uwTl3nq3u2TtWvlHKGT0qihzTIj\" width=\"375\" height=\"500\"></p>","excerpt":"After successfully etching some glass panels I decided to move on to some bottles.  I had to remove the tray and make several measurements to try and get the desired focus height (it didn’t work)  The bottles I had where too large to fit under the head and in the focus range of the laser… but it worked anyway.  I measured my tray depth to be 1.349\" so max focus height is 1.849\" and my bottles are"},"tags":[{"tag":"glass"},{"tag":"etching"}],"user":{"id":"17d06392-46d7-541f-90b4-4ea17c5a4ea3","username":"david.simmons","location":null,"created_at":"2018-02-02T15:08:49.283Z","children":[{"id":"2e55240e-e982-57cc-b71d-e1ce44239da4","name":"120","childImageSharp":{"fixed":{"base64":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAIAAAAC64paAAAACXBIWXMAAAsTAAALEwEAmpwYAAABRUlEQVQ4y9WTsUrDUBSG8zBVW9OS1NRN0G46uLQIKm46ZRacHEUQfAVH30AQB4f6AFJBe29MS9qGqgXlnnubmzQ3BUlAkKTFxEnhXz/+c/7zHwmMpV9L+luwBsZypEokLQuMVYLmSCsXCi0AVmbxUtwTK7Rd5S/H/PXEfTvlg0PaXiNInsrH4ApgmVlbk3HPp9fjj0vB7gRvjvr7gOVohR+ci8yqBe4js+qAcmCUvfeLwH2i7Wpy/qlwPXBbrLsLuAS4RM3VwDP54Iig+SjFVPBONGpoJZx7d3hOUA6eM8Oa4A/u8CwTvB3CKM86mxOv69g6QflYZrPh3h7BJdZZ9+mtYI1o23LKwAzBGj69EbzpwxXtbIThJU6dbJhKzZVR/8CxdcfWmVUDQ5lKzuq2SvAiQQWCCoCLX23P8FXaN/2Xf04LfwIuxzNkOdZu3QAAAABJRU5ErkJggg==","width":90,"height":90,"src":"/discover/static/0c57f04d0c1febaf9f40ee22ca72a4db/8099b/120.png","srcSet":"/discover/static/0c57f04d0c1febaf9f40ee22ca72a4db/8099b/120.png 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