Settings for Movement Speed at Start and End of Job

sdca · November 24, 2022, 6:37pm

Can anyone tell me what setting controls the movement speed at the start of the job and the end of the job? I am using a rotary and the start and end speeds are too fast. The engraving speed is fine. Thank you for your help.

JohnJohn · November 24, 2022, 6:54pm

$110 and $111 are your max travel speeds. These are the default speeds for Traverse or travel motions at the beginning and end of the job.

The accelerations can also generate speed-like symptoms.
They are $120 and $121.

You may want to write down your current settings or save them in a text file before tinkering for future reference.

You can enter the revised speeds and accelerations in the Console window as
$110=300
or whatever speed you like. Units are in mm/minute at the firmware level.

Let us know which rotary you’re using, what you’re engraving and what works best for you. Lots of folks would benefit from this experience.

More about GRBL settings can be found here:

github.com

gnea/grbl/blob/master/doc/markdown/settings.md

## 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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sdca · November 24, 2022, 7:14pm

Thanks John! In retrospect that makes perfect sense. I tried just about every other setting and my $110 and $111 are about 24000. I am using an Atezr P20 with an Atomstack rotary engraving white Polar Camel mugs. The rotational inertial created during the initial movement was cause the mug to spin too much. I am getting good burn results at 3600 mm/min 40 power and 400 lpi.

system · December 24, 2022, 7:14pm

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