Opposite Probing

[gantarone]

Hi ,
I'm new ,
in the process of probing the probe moves in both x and y in the opposite of workpiece
The origin of my CNC are opposite of "Diagram for Probe OP"
so I was wondering if there is a way to reverse them , because if not , the only way is reverse my home limits....
Regards

Simone

[DaveCVI]

Hi Simone,

Hi ,
I'm new ,
in the process of probing the probe moves in both x and y in the opposite manner to the workpiece

When MSM tells mach to do a probe move, it does so using standard gcode commands (G31, G0, G01 etc). So when MSM asks the machine to do a movement (for example) in the X+ direction, the command is sent to mach, and mach generates pulses to move in the X+ direction.
If the physical movement of the machine is not actually resulting in X+ movements, then the machine axis is probably mis-configured.

so I was wondering if there is a way to reverse them , because if not the only way is reverse my home limits....

The most common issue is that an axis is reversed. Check the Mach ports & pins settings for the axes (Dir LowActive column).
Usually you can flip the direction bit to reverse movemnet. Caution: this depends on the motor driver in use - sometimes reversing the dir setting will result in a violation of the driver's set up and hold times for the motor driver signals - which can result in lost steps on direction changes.
You can also change to motor connections to reverse directions.

Regards

Simone

I highly recommend that you set up the physical movement of the axes to use a standard right handed coordinate system as essentially all code assumes standard a right handed coordinate system.

Dave

[gantarone]

Thanks for your replay,
the problem is not the connection or configuration of Mach but the physical movement of the axes , I'm not use standard right handed coordinate system,
so I think is time to change my CNC coordinate and reverse position of my home limits.....
Thanks

Simone