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--- projects:welcome [2017/11/14 18:35]
jerzydziewierz
+++ projects:welcome [2017/11/14 18:36]
jerzydziewierz
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 At this point, there would be no noise, no dust, no vibration e.t.c.
 This is because:
-* the machine is not actually operable. The servo amplifiers are missing and there is no end effector on it.
+ * the machine is not actually operable. The servo amplifiers are missing and there is no end effector on it.
-* When powered, the movement of the primary axes is completely noiseless. This is because these are linear servo motors optimised for ultrasonic research and hence optimised for not generating acoustic noise (which would interfere with measurements). These kind of motors are very unlike stepper motors (which would buzz).
-* When we are ready to install the end effector, this will be the point to consider the amplitude of noise and dust generation:
-** for a 3D printer head, we can all agree that regular ventilation & noise would make it acceptable
+ * When powered, the movement of the primary axes is completely noiseless. This is because these are linear servo motors optimised for ultrasonic research and hence optimised for not generating acoustic noise (which would interfere with measurements). These kind of motors are very unlike stepper motors (which would buzz).
-** for a precision 3D scanner head (actually, one of the original uses of this machine) there would be no noise whatsoever
+ * When we are ready to install the end effector, this will be the point to consider the amplitude of noise and dust generation:
-** for a general purpose CNC machine: I am afraid that this table is not really suitable for a general-purpose CNC operation. This is because the linear motors will have a very limited force that they can exert. Hence, I believe that with current motors, metal and wood processing would not be feasible. One could think about installing stronger motors, but really, that would cost a lot. In any case, if we decide to do this, the dust would have to be extracted up to a cleanroom standard (possible, but not cheap) and the noise would be a serious consideration. High quality spindles (with controlled runout) actually do not create that much noise, but they cost, cost cost.
+ * for a 3D printer head, we can all agree that regular ventilation & noise would make it acceptable
-** for a PCB router: This is much more possible to do. It is possible to build a low power dust extractor from base materials ( i actually have all the parts that I can contribute). The noise would be manageable.
+ * for a precision 3D scanner head (actually, one of the original uses of this machine) there would be no noise whatsoever
-** a spark erosion processor: In such case, there is no dust, no noise, and the end product could be of extremely high quality (injection moulds are often finished with this technique). This method is limited by the available electric power, and in general, very slow. EM interference can be managed by enclosing the working area in a Faraday cage.
+ * for a general purpose CNC machine: I am afraid that this table is not really suitable for a general-purpose CNC operation. This is because the linear motors will have a very limited force that they can exert. Hence, I believe that with current motors, metal and wood processing would not be feasible. One could think about installing stronger motors, but really, that would cost a lot. In any case, if we decide to do this, the dust would have to be extracted up to a cleanroom standard (possible, but not cheap) and the noise would be a serious consideration. High-quality spindles (with controlled runout) actually do not create that much noise, but they cost cost cost.
+ * for a PCB router: This is much more possible to do. It is possible to build a low power dust extractor from base materials ( i actually have all the parts that I can contribute). The noise would be manageable.
+ * a spark erosion processor: In such case, there is no dust, no noise, and the end product could be of extremely high quality (injection moulds are often finished with this technique). This method is limited by the available electric power, and in general, very slow. EM interference can be managed by enclosing the working area in a Faraday cage.

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