I am finally asking for help as I have almost no hair left. On my Ramps 3d printer running marlin and on my xvico 3d printer with its own custom firmware before it starts a print it will search for all the endstops then begin the print. On my 3018 cnc running grbl i am trying to replicate this.
G28 will just home to your 0 xyz or it s last known 0 xyz. So after a power cycle where ever you machine is, is where it thinks 0 is. Is there a G-code command for seek endstop? and behave like hG28 with a debounce on finding the endstop?
Can you post your $$ config? Do it this way please:
```
contents of $$ response go here
```
That will make it easier to read.
Enstops trigger when they hit the switch and all that good stuff. Everything else works just need that go till hit limit switch
$0=10 (Step pulse time)
$1=25 (Step idle delay)
$2=0 (Step pulse invert)
$3=1 (Step direction invert)
$4=0 (Invert step enable pin)
$5=0 (Invert limit pins)
$6=1 (Invert probe pin)
$10=1 (Status report options)
$11=0.010 (Junction deviation)
$12=0.002 (Arc tolerance)
$13=0 (Report in inches)
$20=0 (Soft limits enable)
$21=1 (Hard limits enable)
$22=1 (Homing cycle enable)
$23=1 (Homing direction invert)
$24=25.000 (Homing locate feed rate)
$25=500.000 (Homing search seek rate)
$26=250 (Homing switch debounce delay)
$27=1.000 (Homing switch pull-off distance)
$30=10000 (Maximum spindle speed)
$31=1 (Minimum spindle speed)
$32=1 (Laser-mode enable)
$100=89.890 (X-axis travel resolution)
$101=89.890 (Y-axis travel resolution)
$102=250.000 (Z-axis travel resolution)
$110=250.000 (X-axis maximum rate)
$111=250.000 (Y-axis maximum rate)
$112=250.000 (Z-axis maximum rate)
$120=25.000 (X-axis acceleration)
$121=25.000 (Y-axis acceleration)
$122=10.000 (Z-axis acceleration)
$130=225.000 (X-axis maximum travel)
$131=145.000 (Y-axis maximum travel)
$132=200.000 (Z-axis maximum travel)
I’m not sure I understand exactly. It sounds like you are asking for $23=0 instead of $23=1? I assume you’ve read Set up the Homing Cycle · gnea/grbl Wiki · GitHub — what am I missing about what you are asking?
When you start your machine does it remember its xyz. When i use Laser GRBL and open it my coordinates will always be 0 for xyz. So if I use $23=0 or any combination the machine does not move. If I jog it forward 10 steps then use $23=0 it returns to what it thinks is home. What I am after is there a grbl or g code that will make the machine travel in a direction until it hits and endstop and then set that direction coordinate to 0. If that is what $23=0 is meant to do then my GRBL is buggered.
$23 is configuration not a command.
Whenever I start up, without homing, it assumes it is at machine coordinates (0,0,0) and also is locked until I either home (in my case, I home to lower left, Z up) or $X to unlock. If I’m working in a small space I just position it where I want it before starting it, and $X to unlock and set work coordinates instead of homing; I home when I want it to respect my machine limits because I’m cutting something large. (I have a 780 x 1280 mm cutting area.)
I’m not using the LPC variant but I’m not aware of a difference here; grbl-lpc is intentionally close to the original. I wouldn’t expect it to maintain machine coordinates across a restart.
I think that grbl restarts and looses machine coordinates on connect, which can be a problem if I restart my sender.
Are you saying that G28 doesn’t do a homing cycle for you on grbl?
Correct G28 does nothing. I though it might be laserGRBL so have tried GRBLController and Candle exes. I have also rolled back the GRBL Version from 1.1h to 1.1e and others but still G28 after I start up the machine does nothing. If I jog till I hit an endstop I need to unlock which is what I am currently doing. Then I atleast know where my true 0,0,0 is.
Huh. I got nothing then. I’m hitting the Home buttons in Candle and it’s working for me.
My current $$ for comparison is in $$ time, everybody. What are your GRBL settings? - #9 by mcdanlj in case it’s useful.
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Rebuild main board controller I think. But thank you regardless your settings for acceleration have made my machine a tad smoother.
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The default GRBL homing command is $H, which only works if homing is configured.
Homing in GRBL terms mean find the machine origin and has nothing to do with setting the work origin or work offset!
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