Everything was cutting well, then...the plunge of death!

NeilFerreri1 · December 30, 2021, 1:49am

Change that to $1=255

AdamCook1 · December 30, 2021, 1:49am

Where do I learn what those mean?

NeilFerreri1 · December 30, 2021, 1:50am

gnea/grbl/blob/master/doc/markdown/settings.md#---view-grbl-settings

## Getting Started

First, connect to Grbl using the serial terminal of your choice.

Set the baud rate  to **115200** as 8-N-1 (8-bits, no parity, and 1-stop bit.)

Once connected
 you should get the Grbl-prompt, which looks like this:

```
Grbl 1.1d ['$' for help]
```

Type $ and press enter to have Grbl print a help message. You should not see any local echo of the $ and enter. Grbl should respond with:

```
[HLP:$$ $# $G $I $N $x=val $Nx=line $J=line $SLP $C $X $H ~ ! ? ctrl-x]
```

The ‘$’-commands are Grbl system commands used to tweak the settings, view or change Grbl's states and running modes, and start a homing cycle. The last four **non**-'$' commands are realtime control commands that can be sent at anytime, no matter what Grbl is doing. These either immediately change Grbl's running behavior or immediately print a report of the important realtime data like current position (aka DRO).

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SethCNC · December 30, 2021, 1:53am

This

AdamCook1 · December 30, 2021, 2:00am

So I guess that is to keep me from bumping the gantry during bit changes and causing my detail cuts to be done a 1/2" from where they should have been? (ask me how I know)

SethCNC · December 30, 2021, 2:02am

Yes and it’ll also maintain z position
After setting z zero instead of it dropping down, possibly causing your plunge issue

JamesMountain · December 31, 2021, 2:12pm

The same thing happened to me but with mine it wet thru the wood i was carving and thru the waste board…it did start a small fire…and this is not the first time the z axes went haywire…many times it started carving then went up and down and some times just sat there and did not cut the wood…As for help from inventables, very undesirable.

MikeStanton · January 6, 2022, 6:35pm

This happened to me as well, didn’t plunge, but went totally off design. Tried a lot of different things to fix. None appeared to change anything, then I put the controller on a filtered UPS and the problem has never come back. When it happened, code checked out good. Wiring checked out good. Manual operation checked out good. System was used for several months prior without an issue. then during a simple waste-board leveling the machine went nuts. Have used the machine for several more months and no problems to date.

system · April 6, 2022, 6:36pm

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