Does every joint need to config COMP_FILE?

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01 Sep 2021 06:20 #219310 by curran209
I have three axis, if every axis has a backlash, do i need to config COMP_FILE = file.extension for every joint.
it means joint 1 and joint 2 also need to add COMP_FILE = file.extension in ini?
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02 Sep 2021 21:20 #219466 by andypugh
I don't know for sure, but I would expect LinuxCNC to use a comp file if one exists, or a backlash number, or nothing, on a joint-by-joint basis.

ie, you can have any combination you want.

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07 Sep 2021 07:05 #219819 by curran209
If joint0, joint1, joint2 compensation density can be set separately , do we need to add these content below and add screwcomp0.dat, screwcomp1.dat, screwcomp1.dat this three files.

"COMP_FILE = screwcomp0.dat
COMP_FILE_TYPE = 0",

"COMP_FILE = screwcomp1.dat
COMP_FILE_TYPE = 0",

"COMP_FILE = screwcomp2.dat
COMP_FILE_TYPE = 0",


[JOINT_0]
TYPE = LINEAR
HOME = 0.000
MAX_VELOCITY = 5
MAX_ACCELERATION = 50.0
COMP_FILE = screwcomp0.dat
COMP_FILE_TYPE = 0
INPUT_SCALE = 4000
OUTPUT_SCALE = 1.000
FERROR = 0.050
MIN_FERROR = 0.010
MIN_LIMIT = -10.0
MAX_LIMIT = 10.0
HOME_OFFSET = 0.0
HOME_SEARCH_VEL = 20.0
HOME_LATCH_VEL = 20.0
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = NO
HOME_SEQUENCE = 1
HOME_IS_SHARED = 1

[JOINT_1]
TYPE = LINEAR
HOME = 0.000
MAX_VELOCITY = 5
MAX_ACCELERATION = 50.0
COMP_FILE = screwcomp1.dat
COMP_FILE_TYPE = 0
INPUT_SCALE = 4000
OUTPUT_SCALE = 1.000
FERROR = 0.050
MIN_FERROR = 0.010
MIN_LIMIT = -10.0
MAX_LIMIT = 10.0
HOME_OFFSET = 0.0
HOME_SEARCH_VEL = 20.0
HOME_LATCH_VEL = 20.0
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = NO
HOME_SEQUENCE = 1

[JOINT_2]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 5
MAX_ACCELERATION = 50.0
COMP_FILE = screwcomp2.dat
COMP_FILE_TYPE = 0
INPUT_SCALE = 4000
OUTPUT_SCALE = 1.000
MIN_LIMIT = -8.0

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07 Sep 2021 11:52 #219843 by andypugh
I would expect so. Does it work?

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15 Sep 2021 09:25 #220686 by curran209
there is no compensation effect,why? I added comp_file as it is descripted in linuxcnc.org/docs/devel/html/config/ini-...t__lt_num_gt_section

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17 Sep 2021 04:55 #220857 by curran209
don't work

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