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Hi guys

Here is my INI for you to disseminate

[EMC]
MACHINE = V90
DEBUG = 0

[DISPLAY]
DISPLAY = axis
EDITOR = gedit
POSITION_OFFSET = RELATIVE
POSITION_FEEDBACK = ACTUAL
MAX_FEED_OVERRIDE = 1.2
INTRO_GRAPHIC = emc2.gif
INTRO_TIME = 5
PROGRAM_PREFIX = /home/alex/emc2/nc_files
INCREMENTS = .1in .05in .01in .005in .001in .0005in .0001in
PYVCP = custompanel.xml

[FILTER]
PROGRAM_EXTENSION = .png,.gif,.jpg Greyscale Depth Image
PROGRAM_EXTENSION = .py Python Script
png = image-to-gcode
gif = image-to-gcode
jpg = image-to-gcode
py = python

[TASK]
TASK = milltask
CYCLE_TIME = 0.010

[RS274NGC]
PARAMETER_FILE = emc.var

[EMCMOT]
EMCMOT = motmod
COMM_TIMEOUT = 1.0
COMM_WAIT = 0.010
BASE_PERIOD = 38000
SERVO_PERIOD = 1000000

[HAL]
HALFILE = V90.hal
HALFILE = custom.hal
POSTGUI_HALFILE = custom_postgui.hal

[TRAJ]
AXES = 3
COORDINATES = X Y Z
LINEAR_UNITS = inch
ANGULAR_UNITS = degree
CYCLE_TIME = 0.010
DEFAULT_VELOCITY = 0.42
MAX_LINEAR_VELOCITY = 4.20

[EMCIO]
EMCIO = io
CYCLE_TIME = 0.100
TOOL_TABLE = tool.tbl

[AXIS_0]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 2.5
MAX_ACCELERATION = 24.0
STEPGEN_MAXACCEL = 30.0
SCALE = 10000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -17.5
MAX_LIMIT = 17.5
HOME_OFFSET = 0.500000
HOME_SEARCH_VEL = 0.500000
HOME_LATCH_VEL = 0.050000
HOME_FINAL_VEL = 0.250000
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0

[AXIS_1]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 2.5
MAX_ACCELERATION = 24.0
STEPGEN_MAXACCEL = 30.0
SCALE = 10000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -12.5
MAX_LIMIT = 12.5
HOME_OFFSET = 0.500000
HOME_SEARCH_VEL = 0.500000
HOME_LATCH_VEL = 0.050000
HOME_FINAL_VEL = 0.250000
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0

[AXIS_2]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 1.0
MAX_ACCELERATION = 24.0
STEPGEN_MAXACCEL = 30.0
SCALE = 24000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -4.0
MAX_LIMIT = 4.0
HOME_OFFSET = 0.500000
HOME_SEARCH_VEL = 0.500000
HOME_LATCH_VEL = 0.05
HOME_FINAL_VEL = 0.250000
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0

[AXIS_2]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 1.0
MAX_ACCELERATION = 24.0
STEPGEN_MAXACCEL = 30.0
SCALE = 24000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -4.0
MAX_LIMIT = 4.0
HOME_OFFSET = 0.500000[EMC]
MACHINE = V90
DEBUG = 0

Home location for X,Y axis is 0.5 from far (away from me) left hand hard limit and
Home location for Z axis is 0.5" from minimum (bottom) hard stop for my spindle carriage.
[DISPLAY]
DISPLAY = axis
EDITOR = gedit
POSITION_OFFSET = RELATIVE
POSITION_FEEDBACK = ACTUAL
MAX_FEED_OVERRIDE = 1.2
INTRO_GRAPHIC = emc2.gif
INTRO_TIME = 5
PROGRAM_PREFIX = /home/alex/emc2/nc_files
INCREMENTS = .1in .05in .01in .005in .001in .0005in .0001in
PYVCP = custompanel.xml

[FILTER]
PROGRAM_EXTENSION = .png,.gif,.jpg Greyscale Depth Image
PROGRAM_EXTENSION = .py Python Script
png = image-to-gcode
gif = image-to-gcode
jpg = image-to-gcode
py = python

[TASK]
TASK = milltask
CYCLE_TIME = 0.010

[RS274NGC]
PARAMETER_FILE = emc.var

Home location for X,Y axis is 0.5 from far (away from me) left hand hard limit and
Home location for Z axis is 0.5" from minimum (bottom) hard stop for my spindle carriage.
[EMCMOT]
EMCMOT = motmod
COMM_TIMEOUT = 1.0
COMM_WAIT = 0.010
BASE_PERIOD = 38000
SERVO_PERIOD = 1000000

[HAL]
HALFILE = V90.hal
HALFILE = custom.hal
POSTGUI_HALFILE = custom_postgui.hal

[TRAJ]
AXES = 3
COORDINATES = X Y Z
LINEAR_UNITS = inch
ANGULAR_UNITS = degree
CYCLE_TIME = 0.010
DEFAULT_VELOCITY = 0.42
MAX_LINEAR_VELOCITY = 4.20

[EMCIO]
EMCIO = io
CYCLE_TIME = 0.100
TOOL_TABLE = tool.tbl

[AXIS_0]
Home location for X,Y axis is 0.5 from far (away from me) left hand hard limit and
Home location for Z axis is 0.5" from minimum (bottom) hard stop for my spindle carriage.
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 2.5
MAX_ACCELERATION = 24.0
STEPGEN_MAXACCEL = 30.0
SCALE = 10000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -17.5
MAX_LIMIT = 17.5
HOME_OFFSET = 0.500000
HOME_SEARCH_VEL = 0.500000
HOME_LATCH_VEL = 0.050000
Home location for X,Y axis is 0.5 from far (away from me) left hand hard limit and
Home location for Z axis is 0.5" from minimum (bottom) hard stop for my spindle carriage.
HOME_FINAL_VEL = 0.250000
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0

[AXIS_1]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 2.5
MAX_ACCELERATION = 24.0
STEPGEN_MAXACCEL = 30.0
SCALE = 10000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -12.5
MAX_LIMIT = 12.5
HOME_OFFSET = 0.500000
HOME_SEARCH_VEL = 0.500000
HOME_LATCH_VEL = 0.05
HOME_FINAL_VEL = 0.250000
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0
HOME_SEARCH_VEL = 0.500000
HOME_LATCH_VEL = 0.05
HOME_FINAL_VEL = 0.250000
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0


***********************************************The problem*******************************************************************

Home location for X,Y axis is 0.5" from far (away from me) left hand hard limit and
Home location for Z axis is 0.5" from minimum (bottom) hard stop for my spindle carriage.

EMC2 test Gcode programs work offset is dead centre in middle of the red bounding box.
G54 is the co-ordinate system in use.

To put this problem simply my mill PHYSICALLY homes to X 0.5, Y 0.5, Z 0.5 coordinates AND YET home for the software is the middle of the red bounding box.

What I want to do is have a home location Eg. 0.0 for calibration and recalibration (X 0.5, Y 0.5, Z 0.5) and the work piece offset marker to be where i put it !!! not the other way around. click tool offset and see what i mean.

how would you guys do this????

if you need more info or pics lemme know i will post them up asap

Is this INI posting right? for instance I see [axis 0] heading twice

anyways aside from that, Axis displays the origin in the center of the red box because thats what the INI file says to do.

from [axis 0]

HOME = 0.0
MIN_LIMIT = -17.5
MAX_LIMIT = 17.5
HOME_OFFSET = 0.500000

This says that the limits are +17.5 and -17.5 and home is 0 (that would be the middle)
its says the home switch is .5 away from the home position ( so .5 away from the middle)

Sorry about the INI file.... I have no idea what happened with the copy paste function! your guess is as good as mine.

HOME = 0.0
MIN_LIMIT = -17.5
MAX_LIMIT = 17.5
HOME_OFFSET = 0.500000

Would this config be correct ?

HOME = 0.0
MIN_LIMIT = 0
MAX_LIMIT = 35
HOME_OFFSET = 0.500000

I had to use plus and minus values to input my over all measurement.

Basically I cant use two whole or negative values ! Eg 0, 8 or -0,-8

HOME = 0.0
MIN_LIMIT = -0.5
MAX_LIMIT = 8.5
HOME_OFFSET = 0.5

this brought the spindle centre on each axis to X 0.5 Y 0.5 Z 0.5 to the far left hand corner (X same, Y same Z same)

-0.5 and 8.5 add up to 8

so -0.5 + 0.0 + 0.5 = half an inch offset

not 0.0

I gather this has to every thing to do with how emc2 calculates

is there a better way of doing things?

righto i just found out this isnt the case.

every modification i do in the INI requires EMC2 to be shut down and restarted other wise i end up with really interesting logic problems.

ignore the previous post