2011/10/28 Tom Easterday <tom-...@bgp.nu>:
> Not sure it is the "wrong approach".
As I said, it is what I think, thus just my personal opinion.
Don't worry about it :))
> I don't know if there is a problem. I too am using gantrykins. I have tried
> to find information on how to home the 2-joint/1-axis gantry and I haven't
> been very successful. How does EMC home a dual joint axis? Which encoder
> does it use? Both? Can I have it use only one? Can I specify which one?
> Can I be sure it will appropriately move the other motor together with the
> one on which it is finding the index?
What is the machine supposed to do? What is the required precision?
("the best achievable" is not a valid answer)
If You want to home both gantry joints on one index then I agree that
it might be difficult, because each joint has its own motor with its
own encoder with index pulses in (most probably) different places.
On the other hand I agree that Dave asked very important question - do
You really need to home on index anyway? Homing repeatability does not
usually matter really much, if You do not turn off machine in the
middle of the job and then resume work on the next day.
Viesturs
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