One of the most important specs for a robot is the degrees of freedom. If you need to specify the orientation AND location of the end effector you need at least 6 DOF. You can use fewer if you can redefine the problem.
What people do today, and you should do to is SIMULATEthe robot before you consider buying one. Program the simulation to do the job you need do. and from the simulation you will be able to know the torque requirements at each joint. Notice the you can't just specify ".002" inches. The robot will have different tolerances at difference places in the work spaces. This is just basic trigonometry because the joint encoders work in angles If you can orient your parts tray at the "right" angle and location then you can very much simplify the number of degrees of freedom (and hence cost) of the robot. But you can't work this out on the back of an envelope. You need to simulate the robot and the work space. Good news is that you can have the programming done before you buy hardware. On Thu, Mar 16, 2017 at 7:40 AM, Andy Evans <a...@evanspt.com> wrote: > Folks, I really appreciate the replies I've gotten here. You've helped > me gain a much better picture of what will be involved. Our forecasts > and budget analysis leads me to believe that we could seriously use this > robot within the next year, based on what it will take to put into place. > > To state what we will want this robot to do: > > Grip a part from a magazine (Think 35mm slide carousel) > load into fixture, get out of the way > (Machine tool runs) > pick part from fixture > index part 180 degrees (wrist rotate) > put part back into fixture, get out of the way > (Machine tool runs) > pick part from fixture > reload into magazine > perform move that manually indexes magazine > repeat > > The environment is moist but do not anticipate that this unit would get > wet. We would have it within the machine cabinet. > > We are thinking that we need a small industrial robot (Mitsubishi, > Fanuc) with .002" or so accuracy. The fixture will do some > self-aligning of the part as it is clamped. Does anyone have any > recommendations and sources for a suitable robot? > > Thanks again! > Andy > > ------------------------------ > > Andy Evans > Evans Precision Tooling Incorporated > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
