Re: [CAD_CAM_EDM_DRO] EMC error message - Servo-To-Go

foxprints2003 wrote:

>I have just begun testing a new gantry system & I have run into a
>problem with EMC.
>I have a 3 axis servo system with run by EMC with an 8 axis model 2
>Servo-To-Go board. On EMC startup the Z axis coordinate display is
>red & I get an error message "Minimum Hardware Limit on axis 2
>exceeded"
>Running the testing script utility I am able to write test voltages
>to all three axes without any trouble & the amplifiers/motors
>respond correctly.
>I am unable to get EMC into a "machine on" state presumably because
>of the z axis problem.
>
>

The message is quite specific. Do you have limit switches on the Z
axis? If so, you may need to change the polarity that is expected for the
- Z limit switch. In the .ini file that is actually being called up by
the run
file, this would be the parameter
MIN_LIMIT_SWITCH_POLARITY = n
where n is either 0 or 1.

If you don't have a limit switch, just change the 0 to 1 or vice-versa.
That should allow the system to run.

This file will be in the /usr/local/emc directory, and will have a name
something like emc.ini

Jon