PP2 & Metric machine configuration

def get_linear_scale(self):
        """Return the scale factor for all linear axes based on current G20/G21 mode"""
        return 25.4 if self.g21 else 1.0

def on_touch_z_button_release_event(self, widget, data=None):
        btn.ImageButton.unshift_button(widget)

        valid, dro_val, error_msg = self.conversational.validate_z_touch_val(self.dro_list['touch_z_dro'])
        if not valid:
            self.error_handler.write(error_msg, ALARM_LEVEL_LOW)
            return
        ind = 2
        # the G10 command wants values in mm if G21, but actual_postion and g5x_offsets are in machine units (in.)
        # so we take the sup value and turn it into machine units, then send the offset command in g20/21 units
        supplemental_offset = dro_val / self.get_axis_scale(ind)
        tool_number = self.status.tool_in_spindle
        ...

def get_current_gcode_states(self, param):
        outstr = '\n<span color="#003aff">'
        g20 = 'inches'
        active_gcodes = self.active_gcodes()
        for gc in active_gcodes:
            if gc in 'G54G55G56G57G58G59': outstr += '<b>'+gc+'</b>'+' - current work offset\n'; continue
            if gc == 'G20'               : outstr += '<b>'+gc+'</b>'+' - machine in <b>inch</b> units\n'; continue
            if gc == 'G21'               : outstr += '<b>'+gc+'</b>'+' - machine in <b>metric</b> units\n'; g20 = 'mm'; continue
            if gc == 'G90'               : outstr += '<b>'+gc+'</b>'+' - distance mode <b>absolute</b>\n'; continue
            ...

def update_gui_unit_state(self):
        is_metric = self.status.gcodes[linuxcnc.G_CODE_UNITS] == 210
        if self.g21 == is_metric:
            return

        self.g21 = is_metric

        # swap button art on jog step sizes
        self.clear_jog_LEDs()
        self.set_jog_LEDs()
        # store off in redis for startup in same mode next time.
        self.redis.hset('machine_prefs', 'g21', self.g21)
        if self.g21:
            self.dro_long_format = "%3.3f"
...

class Tormach_Mill_Gremlin(gremlinbase.Tormach_Gremlin_Base):
    def __init__(self, ui, width, height):
        gremlinbase.Tormach_Gremlin_Base.__init__(self, ui, width, height)

        self.ui_view = 'p'
        self.g21 = self.status.gcodes[linuxcnc.G_CODE_UNITS] == 210
        if self.g21:
            self.grid_size = (10.0/25.4)
        else:
            self.grid_size = 0.5
        self.connect("button_press_event", self.on_gremlin_double_click)

def set_grid_size_small(self, widget):
        size = (5/25.4) if self.ui.g21 else .1
        self.set_grid_size(size)
        self.ui.gremlin_options.update_grid_size('small')

    def set_grid_size_med(self, widget):
        size = (10/25.4) if self.ui.g21 else .5
        self.set_grid_size(size)
        self.ui.gremlin_options.update_grid_size('med')

    def set_grid_size_large(self, widget):
        size = (25/25.4) if self.ui.g21 else 1.0
        self.set_grid_size(size)
        self.ui.gremlin_options.update_grid_size('large')

[AXIS_0]
TYPE = LINEAR
MAX_VELOCITY = 1.0
MAX_ACCELERATION = 15.0

MAX_JOG_VELOCITY_UPS = 1.0
MIN_JOG_VELOCITY_UPS = 0.008333

# 20% higher
STEPGEN_MAX_VEL = 1.2

# 2.5x
STEPGEN_MAXACCEL = 37.5

SCALE = 16933.333
# time in nanoseconds
DIRSETUP = 10000
DIRHOLD = 10000
STEPLEN = 8000
STEPSPACE  = 5000

FERROR = 0.050
MIN_FERROR = 0.010

MIN_LIMIT = -10.000
MAX_LIMIT = 0.000001
HOME_OFFSET = 0.025
HOME_SEARCH_VEL = 0.750
HOME_LATCH_VEL = -0.050
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0

[RS274NGC]
PARAMETER_FILE = ~/lathe_data/emc.var
RS274NGC_STARTUP_CODE = G7 G18 G20 G90 G64