If you want to manually home the machine, you may want to use gantrykins, where you can jog each gantry axis separately, but I've generally not enjoyed using non-trivialkins configurations (this is reportedly a lot better if using the Joints-Axis code from LCNC, but that hasn't been ported to Machinekit yet).
Otherwise, if you want to use the gantry component (as is done in the Comet configs), you need to wire at least one limit switch. Then you can hold that switch and jog the axis and only the other motor will move (towards the home position, anyway). You will probably want two switches, since hitting the limit only stops motion in one direction. If you want to carry on without limit switches, I think you'll find it easiest to just use a plain trivialkins setup. You can manually remove any skew between the gantry joints prior to powering on, then jog to and set your home position as usual. So...I'd recommend you either add limit switches or don't use the gantry component. On 4/27/2017 8:59 PM, Jim McIntosh wrote: > Hi, > > I'm running the BBB with the Probotix breakout board; but I don't have any > limit switches. How do I make it to where I can manually home the machine? > (it's > on an entirely different setup, not a comet) > > any help would be appreciated. > > -Jim > > On Friday, August 15, 2014 at 9:32:46 AM UTC-6, Charles Steinkuehler wrote: > > I finally crafted some example configurations for the gantry HAL > component I wrote some time ago. These specific configs are for a Comet > router from Probotix, but should work as a starting point for any gantry > style system that has a homing switch available for each gantry joint > (ie: Shapeoko or similar). > > Video on Youtube: > https://www.youtube.com/watch?v=7XhIoDV8Hp8 > <https://www.youtube.com/watch?v=7XhIoDV8Hp8> > > Configs are in a github PR (already merged while I was typing!): > https://github.com/machinekit/machinekit/pull/276 > <https://github.com/machinekit/machinekit/pull/276> > > The relevant portions of the config in the HAL file: > > Splitting one commanded position into two with the gantry comp: > > https://github.com/machinekit/machinekit/blob/master/configs/ARM/BeagleBone/Probotix/Comet.hal#L54-L62 > > <https://github.com/machinekit/machinekit/blob/master/configs/ARM/BeagleBone/Probotix/Comet.hal#L54-L62> > > > Home/limit switch setup: > > https://github.com/machinekit/machinekit/blob/master/configs/ARM/BeagleBone/Probotix/Comet.hal#L105-L111 > > <https://github.com/machinekit/machinekit/blob/master/configs/ARM/BeagleBone/Probotix/Comet.hal#L105-L111> > > > Holler if there are any questions! > > -- > Charles Steinkuehler > [email protected] <javascript:> > > -- > website: http://www.machinekit.io blog: http://blog.machinekit.io github: > https://github.com/machinekit > --- > You received this message because you are subscribed to the Google Groups > "Machinekit" group. > To unsubscribe from this group and stop receiving emails from it, send an > email > to [email protected] > <mailto:[email protected]>. > Visit this group at https://groups.google.com/group/machinekit. > For more options, visit https://groups.google.com/d/optout. > -- Charles Steinkuehler [email protected] -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
