2011/5/23 Mark Wendt <[email protected]>: > > Very nice. I noticed you have (and maybe it's just because of the angle > the video was taken) only one linear rail that the base of your robot > arm was running on. Do you have a second one underneath? If not, is > there any noticeable lifting or movement of the bearing when the arm > extends and moves back? >
Yes, You saw correctly - there is only one Hiwin rail with 2 blocks. I wanted one more rail some 200 - 300 mm lower for increased stiffness, but the client rejected that idea, because that would cost too much. The thing is that the frame already was done, when I joined the project, so my design starts from sholder joint and up, the linear slide with all the motor and reducer in linear joint was already there. If I grab by the end of the arm, I can swing it by hand by several milimeters. But it is hard to see, if it actually swings in the Hiwin blocks, because there is backlash in those blue worm reducers and the base frame also swings - it is not perfectly stable, so I have to admit that those Hiwins are not the worst part, actually they seem to be pretty good. Viesturs ------------------------------------------------------------------------------ What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
