On 30 May 2012 11:15, Viesturs Lācis <[email protected]> wrote:

> I am sure that it would work, if it is done the way I suggest:
> 1) home gantry with slave connected to a home switch on slave end;
> 2) when it is stopped; "disconnect" slave step signal and change X
> home switch to one on master end of gantry;
> 3) rehome X, this time slave will stand still and gantry will be squared out;
> 4) when it is stopped, connect the slave joint back.

> All it needs is 2 instances of mux2bit component

I think that it could be done more easily by twiddling the stepgen
enables rather than muxing the step bits.

1) Home to slave switch, both stepgens enabled
2) Home to master switch, with only master stepgen enabled.

It might even be possible to do it automatically inside the homing
sequence. You could use a "dummy" axis which was first in the step
sequence for the initial home, then home the true axis second.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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