The master branch has gantry homing now.

JT


On 2/20/2017 11:09 AM, Eric H. Johnson wrote:
>   
>
> I am finally getting around to re-controlling a large (15' x 30') XY table.
> The gantry is driven by two oppositely mounted servo motors, axes Y1 and Y2.
> The current homing sequence works as follows:
>
>   
>
> Y1 and Y2 move together until Y1 resolves its home.
>
> Y2 then decouples from Y1 and resolves its home.
>
> Thereafter Y1 and Y2 are recoupled.
>
>   
>
> I am trying to figure out how to do basically the same thing under Linuxcnc,
> or an alternate approach that works equally as well. I looked at the
> "gantry" example program, which does much the same thing with stepper
> motors, and uses gantrykins for the kinematics module. The home looks to be
> done effectively manually by switching between joint and world mode. Can
> this be done as part of an automated home sequence?
>
>   
>
> Note: There is enough play in Y2 that it can move roughly +/- 2" from being
> dead on with Y1 before it will start to mechanically bind.
>
>   
>
> Thanks.
>
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