I'm new to CNC and have ready much on the setup, but am experiencing issues with the 3018 CNC kit from SainSmart. The issue is with the Z-axis when i issue move commands. The spindle travels past the intended position. It may be with the settings that I'm using. I have a limit switch set for the Z-axis and I'm using GRBL 1.1 with the Candle program they provide.

If I zero out the Z axis using the alligator clip probe and send the following I get an error will before i hit the full length of the Z axis... it moves to the correct position and sends an error.

G91 < ok
F1000 < ok
Z25 < ALARM:4
ok

I can manually jog 25 units just fine without error. Any ideas?

$$ < $0=10
$1=25
$2=0
$3=2
$4=0
$5=0
$6=0
$10=1
$11=0.010
$12=0.002
$13=0
$20=0
$21=1
$22=1
$23=0
$24=25.000
$25=500.000
$26=250
$27=2.000
$30=1000
$31=0
$32=0
$100=800.000
$101=800.000
$102=800.000
$110=1000.000
$111=1000.000
$112=600.000
$120=30.000
$121=30.000
$122=30.000
$130=300.000
$131=180.000
$132=45.000