Limit Switch doesn't work

X-Carve Troubleshooting
1

Hi,

I setup the machine yesterday, but I have two issues. I’ll discuss the first one here.
The problem is with limit switches. When I try to run homing sequence, it doesn’t stop after hitting the switch (the motor moves up along Z, but continues to do so after hitting the switch).

I wired things according to the instructions. (PIN 12= Z, PIN 10 = Y, PIN 9 = X).
I can verify that when the switch is not touched, there is a 5V across the contacts, and as soon as the limit switch is pressed, it goes to 0.
I am using Grbl v0.9 (so, Z is suppose to go to pin 12).

Any ideas?

Thanks,

Shay

2

and you made sure that homing was enabled during easel set up?

3

Yes. Homing is enabled during the setup. It gets stuck during the setup.

4

Can you post the $$ output from grbl. It would help with the solution to your problem.

You can either use a terminal program or Easel Machine Inspector to get these values.

5

Grbl 0.9j [’$’ for help]
$0=10 (step pulse, usec)
$1=255 (step idle delay, msec)
$2=0 (step port invert mask:00000000)
$3=3 (dir port invert mask:00000011)
$4=0 (step enable invert, bool)
$5=0 (limit pins invert, bool)
$6=0 (probe pin invert, bool)
$10=3 (status report mask:00000011)
$11=0.020 (junction deviation, mm)
$12=0.002 (arc tolerance, mm)
$13=0 (report inches, bool)
$20=0 (soft limits, bool)
$21=0 (hard limits, bool)
$22=0 (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)
$100=40.000 (x, step/mm)
$101=40.000 (y, step/mm)
$102=188.976 (z, step/mm)
$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=290.000 (x max travel, mm)
$131=290.000 (y max travel, mm)
$132=100.000 (z max travel, mm)
ok

6

Pretty sure $22=0 means homing is disabled. Should be $22=1

7

Yep, you need $22=1 to get a homing cycle.

The other grbl parameters look good.