OK, the way you change axes directions is by changing the $3= to the number that you want to change. So now you should look at the chart and change that number to change one axis at a time or go through x carve set up and it will ask you to jog the axes and if they are going in the correct direction.
X-Carve Instructions: Computer Setup (inventables.com)
as far as $130, 131, 132 that number is Maximum travel in mm.
Here is an example of default grbl settings.
X-Carve default GRBL Settings $$ Values
October 7, 2021
These are the default GRBL settings for a stock X-Carve.
If you have any of the 2021 upgrades like the 9mm belts or the extended Z then your $3, $100, $101, $102, and $132 will be different reference these changes here: Changing GRBL Settings for the 9mm Belt and Linear Rail Z Upgrades on your X-Carve
To View and Change your Settings In Easel Select Machine > General Settings > Machine Inspector ( OR simply Press Ctrl+Shift+D )
Then scroll to the bottom portion labeled “settings” if any need changed, scroll to the top “console” section and enter them one at a time as needed.
$0=10 (Step pulse time)
$1=255 (Step idle delay)
$2=0 (Step pulse invert)
$3 = 3 (dir port invert mask:00000011) *Values may differ for Z-Axis Upgrade
$4 = 0 (step enable invert, bool)
$5 = 0 (limit pins invert, bool)
$6 = 0 (probe pin invert, bool)
$10 = 115 (status report mask:01110011)
$11 = 0.020 (junction deviation, mm)
$12 = 0.002 (arc tolerance, mm)
$13 = 0 (report inches, bool)
$20 = 1 (soft limits, bool)
$21 = 0 (hard limits, bool)
$22 = 1 (homing cycle, bool)
$23 = 3 (homing dir invert mask:00000011)
$24 = 25.000 (homing feed, mm/min)
$25 = 750.000 (homing seek, mm/min)
$26 = 250 (homing debounce, msec)
$27 = 1.000 (homing pull-off, mm)
$30 = 1. (rpm max)
$31 = 0. (rpm min)
$100 = 40 (x, step/mm) *Values differ for 9mm Belt Upgrade
$101 = 40 (y, step/mm) *Values differ for 9mm Belt Upgrade
$102 = 188.947 (z, step/mm) *Values differ for Z-Axis Upgrade
$110 = 8000.000 (x max rate, mm/min)
$111 = 8000.000 (y max rate, mm/min)
$112 = 500.000 (z max rate, mm/min)
$120 = 500.000 (x accel, mm/sec^2)
$121 = 500.000 (y accel, mm/sec^2)
$122 = 50.000 (z accel, mm/sec^2)
$130 = 790.000 (x max travel, mm) *work area will vary with your X-Carve Size, subtract 210 from the size of your X-Carve in mm (750-210=540) & (500-210=290)
$131 = 790.000 (y max travel, mm) *work area will vary with your X-Carve Size, subtract 210 from the size of your X-Carve in mm (750-210=540) & (500-210=290)
$132 = 100.000 (z max travel, mm) *Values differ for Z-Axis Upgrade
That is from Seth’s website I think;
X-Carve default GRBL Settings $$ Values – His N Hers Handcrafted
Lastly $100 and $101 can be computed as I mentioned in my above link. You measure what you have and do the math ratio for what you want. Multiply the resulting number by the current number and that new number should be the replacement.
It appears you have lead screws, so the default X carve numbers for 100 and 101 won’t work. You can easily jog a distance, say 100 mmm, and see what the actual measurement is, and do the math.
smiling_face_with_tear: 
Any help would be just a relief.
