Posts by stan.at.unifirst

  • calibration

    We do not need the level of accuracy that is standard on our RH-F SCARA. Is there someway in the calibration feature to reduce or loosen the calibration and thus reduce the number of error codes?

  • Programming assistance requested

    We are trying to program the movements of a Mitsubishi RH-3FH-D SCARA robot and are about to pull our hair out. :help:


    Via spindle tooling ending with vacuum cups we are holding thin rectangular items roughly 11.3mm X 6.3mm with 7mm radii on each corner. We need to move the edge of the item past a fixed point in a continuous and even manner. The straight line moves are not an issue, but creating the arc on the corners is just about eating our lunch. The center point of rotation of the spindle is in the center of the rectangle making the arcs on the corners very difficult to execute.


    When I was writing CNC programs one of the things we could do was change the XY intersection (origin) to the center of a feature. Is there anyway to so something like this with the Mitsubishi SCARA robots?


    Or is there another solution? "Back in the day" of NC programming one had to calculate each & every point of an arc. That's one possible solution, but I'd really rather find something much more friendly.


    Thanks in advance,


    Stan

  • Ball screw replacement source found

    If you are in need of a new ball screw due to a crash or other unfortunate event you may want to contact me. I'm a manufacturing engineer who is learning robot integration and in the process the system engineer with whom I am working bent the ball screw way beyond repair. A new replacement was in the neighborhood of $5K, but the screw turned out to be a slightly modified THK ball screw. I may be able to help by possibly supplying a new screw for considerably less than the OEM price. This will be a new screw, not a reman or repaired unit. Contact me directly at stan.lightner@gmail.com

  • need some conveyor advise

    I'm looking at some modular conveyor manufacturing companies for a project at work. At this time I'm seriously considering Smart Move Modular Conveyors as my supplier http://www.4smartmove.com/. Does anyone have any experience with this brand? If so, please let me know as I'm especially interested in reliability, longevity (especially the belt), ease or lack thereof in regard to maintenance, support (parts etc), or any other pertinent information.


    Thanks,


    Stan

  • Ball screw help needed

    :help:



    Does anyone know of a source for a THK ball screw BNS 1616A?


    We had a crash and bent the ball screw. I was able to straighten the screw within a couple of thousandths of an inch but I was unable to reassemble the unit with all the balls in the nut.


    So I'm looking for a solution. It could be a new/used ball screw assembly, a new/used nut (the one with a helical spiral), a method to properly reassemble the nut & screw, or ??????????


    If you have a possible solution please contact me at stanley_lightner@unifirst.com or 270 683 5252 X 7447


    Thanks in advance.


    Stan

  • Tips for buying used robots

    Depending on your son's age and your location I recommend that you check your local community college/technical school for a robot class. Many offer night classes which make scheduling much easier. Also keep in mind on-line course work is not for everyone nor are all on-line classes the same in content, presentation, instructor skill, etc.


    There may also be a robot club at a local school where he can learn from other enthusiasts.

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