>
> Thinking about it all I come to a much more fundamental problem with
> regard to home. I will try and explain.
>
> Take the X and Y axis. Looking at the frame of the machine the X axis is
> from left to right, the Y axis is bottom to top.
>
> By convention (established by Descartes?) the X0.0 should be on the left
> and Y0.0 at the bottom.
>
> When I try and home the Y axis it heads off to the top some 300mmm away.
>
> So how do I tell Axis that Y 'home' is down at the bottom of the axis so
> I can establish Y0.0 in the correct perspective???? Swap the connections
> to the stepper?
>
> I cannot see anything in the literature about controlling the home
> search direction.
>
> Any help/thoughts/suggestions appreciated.
>
> Ian.
>
Hi Ian My turn to jump in here :)
first question do the axis all jog in the right direction according to
convention
heads moves right on positive jog?
head moves up (using your description - plan view) on positive jog?
if not you must fix that first .
how are your limit switches connected?
Do you have separate inputs for each switch or are they all combined on one
input?
Actually a good question is how did you make this config? did you use stepconf
or
hand edit a example file?
In the INI file under [AXIS something]
the direction of home serach is controlled by the sign of HOME_SEARCH_VEL
A negative sign should make it home towards the negative direction.
A positive sign should make it home towards the positive direction.
I'm sure it is possible to have this backwards, there are many ways to change
the direction of the axis .
the bottom line here is if homing doesn't change directions when you change the
sign then something is wrong!
The speed of the course search is set here also, so don't set it to zero
the direction of home latching is controlled by the sign of HOME_LATCH_VEL
this can't be zero either
if you are sharing home with limit switches (I think you are)
then HOME_IGNORE_LIMITS must be set to yes too.
check these thing.
and post your INI and HAL files so we can look at them.
Cheers
Chris M
_________________________________________________________________
MSN Dating: Find someone special. Start now.
http://go.microsoft.com/?linkid=9734384
------------------------------------------------------------------------------
This SF.net email is sponsored by Sprint
What will you do first with EVO, the first 4G phone?
Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
