Home made mini glassworking lathe

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Homemade Mini Glassworking Lathe Homemade Mini Glassworking Lathe (Design notes appear at the bottom of this page.) http://www.big-list.com/glasslathe.html (1 de 8)24/03/2005 2:47:40 Homemade Mini Glassworking Lathe http://www.big-list.com/glasslathe.html (2 de 8)24/03/2005 2:47:40 Homemade Mini Glassworking Lathe http://www.big-list.com/glasslathe.html (3 de 8)24/03/2005 2:47:40 Homemade Mini Glassworking Lathe http://www.big-list.com/glasslathe.html (4 de 8)24/03/2005 2:47:40 Homemade Mini Glassworking Lathe Design Notes A glassworking lathe is a specialized lathe for manipulating glass http://www.big-list.com/glasslathe.html (5 de 8)24/03/2005 2:47:40 A torch is Homemade Mini Glassworking Lathe used instead of a cutting tool for shaping the glass The glass, usually in the form of a tube, is held by two rotating chucks The chucks face each other and rotate in sync One chuck is mounted on a stationary headstock while the other is mounted on a moving one The chucks and headstock shafts are hollow so that the glass and/or a blowhose may be passed through them The glassworking lathe described here is designed around TAIG metalworking lathe kit components The design goals were: 1) Low cost 2) Simplicity 3) Optional headstock de-synchronization This site describes but one approach to building a glassworking lathe and is not intended to be a "how-to" Your metalworking skills, electronics experience, and pocketbook may dictate an entirely different design Please note that there are no plans or kits for this lathe Two headstocks and two scroll chucks were ordered instead of the normal one of each, and no tailstock was purchased as that was replaced by the second, moving headstock The TAIG 3-jaw scroll chucks were essential to the design At only $44/chuck there was no way I could make anything that good and that cheap even though I have my own full-size metalworking mill and lathe The jaws are easily replaceable so one could make new ones out of more appropriate materials (lower thermal conductivity, etc.) but so far I've just put a bit of hi temp tape on each aluminum jaw and that has worked just fine The headstocks can pass small diameter (~0.344") tubing through their centers, the chucks can pass about twice that This makes connection of the blowhose easy via a stopper in the end of the glass tube, or, smaller diameters of glass tubing can just be passed through the chuck/headstock to the blowhose & blowhose swivel outside of the lathe In the present setup, the lathe will turn something 7-inches in diameter with 12 1/2 inches between the faces of the 3-jaw chucks The lathe components are mounted on a length of heavy aluminum channel Two 130 oz-in surplus steppers are used - one for each headstock This _greatly_ simplifies the mechanics allowing for synchronization & easily variable speed The steppers were only $9.95 each from Herbach & Rademan I was surprised that the 130 oz-in steppers barely have enough torque for the job, and they turned so slowly that I had to "gear" the setup as shown to get a good range of speed The final setup with timing belt drive achieves a speed range of RPM to 240 RPM (half-stepping the steppers.) This is on par with what "real" Litton glassblowing The stepper driver was built around two Allegro UCN5804 stepper driver chips International Rectifier IRLZ44N logic-level-drive HEXFETS power the stepper http://www.big-list.com/glasslathe.html (6 de 8)24/03/2005 2:47:40 Homemade Mini Glassworking Lathe coils The two separate stepper chips (
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