Roland Hoffert, from www.eytec.de, submitted us this 3Drag (Velleman K8200 version) hack to improve the z-wobble issue, one of the most known problems affecting the RepRap family printers. Roland identified one of the weak points that could cause the z-wobble in the fixed coupler of z-stepper motor. With the standard fixing, when the z-stepper moves…
Karl Seiss from Austria made a very clever hack to a K8200 3DRag printer, turning it into a CNC drilling and milling machine. We didn’t receive from the author many details, anyway it used Proxxon long shaft drills to have a highly reliable and powerful tool. Moreover, Karl built by himself also a “vacuum support”…
Alessio Fusi hacked his 3Drag/K8200 printer by replacing the original threaded rod with a trapezoidal rod, assembled with a gearbox between it and the stepping motor with a reduction rate of 50:20. In a short time, Alessio will replace the gearbox too (fully printed with the printer itself) with a 30:10 ratio that, together with…
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