Updated to GRBL 0.9, z axis plunges

[overownt]

Hello! first off I would like to say it is my first day on the forums, but have had my Shapeoko 2 for quite some time and happy to be a part of the community!

Here is my setup:
Arduino Uno w/ newest revision of Gshield running Grbl 0.09 (current)
Misumi 500x500 T table
Dual Y
1.5 Kw water cooled spindle
Arduino controlled Aluminum cutting fluid drip feed

Here is my issue:
I recently updated my grbl and in addition I updated my Universal Gcode sender and here is what happens. I set the correct baud and connect and set all of my setting to match similar builds. But when I press ANY of the manual directions controls, the Z axis will attempt to plunge as far as possible, after this has occurred, I can control the machine as normal, set the zero and homing position. Disconnect around we go again.

I know my way around it generally but with the update the Grbl commands have been rearranged and I feel I am overlooking something because I cannot find anything that would cause what appears to be some sort of homing cycle.

[cvoinescu]

Try G10 L2 P1 X0 Y0 Z0 to clear any offsets in the G54 (default) work coordinate system. Maybe the EEPROM did not get cleared completely during the upgrade.

[overownt]

I will give that a shot as soon as I am home, does that value get held even if the machine is reset?

[chamnit]

In Grbl v0.9j, there is a new set of wipe EEPROM commands. `$RST=#` will wipe all of the coordinate offsets. While `$RST=*` will restore all of the EEPROM and settings.

[cvoinescu]

In Grbl v0.9j, there is a new set of wipe EEPROM commands. `$RST=#` will wipe all of the coordinate offsets. While `$RST=*` will restore all of the EEPROM and settings.

Handy!

does that value get held even if the machine is reset?

Yes.

[overownt]

Interesting! I will give these both a try when I get home, it would be really great to start using it again, I haven't had a good chance to test my drip feed system for cutting fluid

[overownt]

Terrific! it took awhile but I messed around with both suggestions and now understand how to make it function properly, however as if it were on queue, I now have a huge USB interference issue from my spindle. I can work and operate with it off just fine, but when it is on, it loses connectivity and i hear it connecting and disconnecting repeatedly *windows chime*. I will try relocating the usb and adding some ferrite beads.