Edge glass bed clamps for Kossel, Rostock & Co.

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Up To Now, I Clamped My Glass Bed Down Onto My Aluminium Heated Bed With Some Paper Clips Or Alternatively Some Picture Frame Clips. I **Really, Really** Disliked This Solution, As You Tend To Imprint The Imperfections Of Your Aluminium Heated Bed Onto The Otherwise Nearly Perfectly Flat Glass Surface, Which Defeats A Major Part Of The Whole Purpose. This Little Thing Here Is Inspired By An Alternative Way To Clamp Glass Beds: By Its Edge (Common On Prusa I3'S, Such As Wanhao Di3 Etc). I Adapted The Same Method For The Round Bed Shape Of Kossels/Rostocks Etc. The Result (For Me) Is Impressive: With Paper Clip Clamping And Using Dc42'S Calculator (Http://Escher3D.Com/Pages/Wizards/Wizarddelta.Php) I Got The Standard Deviation Of The Probed Bed Height Down To ~70 Μm. With This Thing Here, I Tend To Get A Standard Deviation Of 40 Μm Over The Whole Bed Area. Also, Escher Tends To "Guess" The Diagonal Rod Length More Accurately. I Do *Not* Use Bed Correction Anymore Since I Opted To This Clamping Method. For Me, Bed Correction Did *Not* Result In Any Noticeacle Improvements Anymore! To Be Clear, This Method Also Has A Disadvantage: As You Are Not Forcing The Glass Bed Onto The Heated Bed Anymore, You Will Tend To Get Gaps Between The Glass And The Aluminium (For Me ~ 1 Mm To 1.5 Mm At Max.). I.E. The Heat Will Not Spread As Evenly As Before. In My Case, I Have Fluctuations Of ~6 Kelvin Over The Bed Surface (@ 60°C). Though, This Did Not Influence The Printing In Any Significant Way For Me Yet.

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