Re: mdi moves

[Paul <paul-at-bdiemc.fslife.co.uk>]

Hi Dave

I have experienced this problem consistently over the time I have been 
working with EMC. It is not just the X or Y axis that is affected - It 
happens with all of them.

If you monitor the raw data being passed to the trajectory control, you will 
see any axis that is not given a position on the MDI input will assume the 
*current* position. In your example, if Y5.5 is commanded when X is at 2.775, 
once X reaches 5, the next move on the stack will be Y5.5 X2.775 Z0 F10.
The short term answer is to enter X5 Y5.5 Z0 to remove any ambiquity. Long 
term perhaps, any unspecified axes should use the last value on the motion 
stack rather than the *current* position.

Regards, Paul.


On Friday 21 March 2003 7:26 pm, Dave Engvall wrote:
> Bring up emc and home:
> shift to mdi
> G1 X 12 Y 5 F10
>      X 5
> before the machine arrives at X = 5 issue:
>      Y 5.5
> machine completes the X5
> then does a G1 X(position when the Y 5.5 CR was done) Y 5.5

-- 

"To err is human...to really f*** things up requires the root password."
>From a collection of quotes at http://www.indigo.org/quotes.html