Have your GRBL parameters changed?
I’m not sure… how do I check that?
Easel - Machine Inspector - Console
Write $$ and press Enter
Your current GRBL parameter values will start to list below.
Post them here.
$$
ok
$132=100.000
$131=540.000
$130=540.000
$122=50.000
$121=500.000
$120=500.000
$112=500.000
$111=8000.000
$110=8000.000
$102=188.976
$101=40.000
$100=40.000
$32=0
$31=0
$30=1
$27=1.000
$26=250
$25=750.000
$24=25.000
$23=3
$22=1
$21=0
$20=0
$13=0
$12=0.002
$11=0.020
$10=115
$6=0
$5=0
$4=0
$3=3
$2=0
$1=255
$0=10
Those look to be standard values.
Is the measured travel for all axes = jog command distance?
Carve feed rates and RPM?
How do I check those?
The X/Y grid on the waste board is irrelevant to the machine. Its just a visual aid for the operator.
How do you set your work zero? (Easel Home Position - do not confuse with homing switches)
I usually home the machine every time I turn it on and then set the work zero to where the bit is in the pic. And I use a probe
Sounds about right.
What RPM/feed rate/ depth per pass did you use on the failed carve shown in post 1?
Shouldnt cause problems 
I am pretty sure its something mechanical, either hitting the limit of reach, or something is binding causing the steppers to stall out. Hard to say more without seeing it in action 
How does it “carve” if you run the program with router off / no bit?
Looks like its struggling for real.
Sorry for all the questions but we need to rule out as much as possible
It seems to be running fine without the bit in or router spinning. Have made four passes and seems to be staying on path
Okay, what about trying a shallower depth per pass?
Like 0.03
I’ll try that
So far that seems to be working
, it has not gone off path yet
Okay good, then it was most likely overloaded in terms of carve forces / available power, or a mechanical issue.
Are you using a gshield or Xcontroller?
I would expect 0.06" DoC to be fine. Perhaps others with Xcarve can chime in as my CNC is DIY´d and not comparable to XCarve any longer.