How to get startup mode in inches (G20) about bcnc

[chamnit]

Grbl defaults to G21 mm mode. This is the g-code standard default. To startup with G20 inches mode, Grbl has the $N startup-string commands to do this for you. To program it, send $N0=G20 to Grbl. You'll see it execute every time you power up and soft-reset. (It DOESN'T do it when unlocking from an alarm. There are reasons for this. Just be aware.)

[HomineLudens]

@Scott216 are you looking the correct configuration file? In windows user file is located in %userprofile% and it's named ".bCNC". It's not the bCNC.ini file in program directory.

[Scott216]

I was looking at the bCNC.ini file in program directory.

[Scott216]

@chamnit I've got the $N0 set for G20 already, actually it's G90G20G54G17
I don't think it's running at startup, or if it is, something is changing it back to G21.
Here's what I did:
With bCNC running I closed my com port. Next I unplugged the USB to gshield board for a few seconds. After I plugged USB back in I opened the com port. Then I tried to jog, but got bCNC error saying it was in Alarm lock. So then I sent $x to the gshield. Now I can jog, but it's in metric. If I issue a home command it will go into inches. From your post I understand $x will not run the $N0 commands. When I plugged the USB cable back into my computer and the gshield powered up, shouldn't $N0 commands run and the gshield go into inches mode?

[Scott216]

@chamnit BTW, I'm using grbl 0.9i, but I grabbed the github repo yesterday and uploaded using Arduino IDE. So it's the version with the homing changes and some other stuff, M0 and M30 I think.

[Scott216]

My shapeoko (gshield + GRBL v0.9i) is switching from inches to mm after a reset. Here's the scenario I just did.
Machine is in inches and I homed it. I went to G0 X3 Y3, and it moved fine. Then I did G0 X3 Y30. This gave me a soft limit error as it should. Then I clicked on Reset button then the Unlock button. Next I did G0 X3 Y3, but this time it went to x=3 mm and y=3mm. I understand from the above post that $N0 isn't run on reset, but where is it getting changed from inches to metric? My $N settings are:
$N0=G90G20G54G17
$N1=

from the .bCNC file in my user profile directory
[CNC]
units = 1
acceleration_x = 25.0
acceleration_y = 25.0
acceleration_z = 50.0
feedmax_x = 3000.0
feedmax_y = 3000.0
feedmax_z = 2000.0
travel_x = -287.0
travel_y = -325.0
travel_z = -70.0

Build date on bCNC is June 18, 2015