These are accessed through the command interface portion of Universal GCode Sender (UGCS). We are interested in maximizing the following the GRBL feed rate parameters. These settings represent the upper limit of what the machine will do even if the gcode program tells the machine to move faster. The actual cutting feed rates in your gcode program are set in your CAM software. I saw a significant drop in cycle time, the amount of time it takes to cut a given part.Īgain these settings deal with the machine limits. This meant that the machine moved to the cutting positions faster and didn’t waste time slowly moving to the next cut. In my case, I was able to more than double the safe speed of my machine. Especially if your max GRBL feed rate settings are not optimized. Depending on what you are cutting and how big that part is, this can add up to a significant amount of time. Many times, your machine will have to rapid to a location before or between cuts. The following guide outlines the process of setting your GRBL feed rate. Now that your machine moves to the location you want, it’s time to see if we can get the machine there faster. Click the following link for a guide that will walk you through the process for the x,y and z axis Steps per mm ($100, $101, $102). If not then before setting your GRBL feed rate, I recommend you set the steps per mm at the very least. By now you should have adjusted a few of the GRBL settings. Once you have it working in elekscam, it should work in lightburn.Congratulations on getting your CNC machine running. Here is another great resource for your setup.Īs another member previously posted, “Scroll down to the bottom ‘operating instructions’ and follow that. The $30 value can be set either in your firmware to match LightBurn, or in the LightBurn device settings (S Max) to match your GRBL setting.

Once running grbl 1.1f or later, check your setting for $30 and $32 in the console by typing $$ and pressing enter. There is a separate group for these types of machines on Facebook and quite a few people there use LightBurn, so they might be able to advise you more. Ideally, you would upgrade to GRBL 1.1f and then use just the GRBL device. Typically the machine ships with an older version of grbl so go with the GRBL-M3 (1.1e or earlier) device in LightBurn.

How to adjust grbl controller