I am a complete newbie when it comes to this and I am trying to gain all the information needed. So I just received my 5500mw cnc 3018 pro that is running GRBL 1.1. I want to mainly use the lasering for engraving. I have been watching the tutorial videos from lightburn which are very informative. I am doing the wifi password test one. Since again I am completely new to this, I am not sure exactly what I am doing. So when I run the machine settings using $$ I get all the codes which are as follows:
Do these need to be changed? I have been trying to contact who I purchased it from but have not been successful as they have not been responding. Anyways with the test of the wifi code engraving and cutting, I have 3 layers. For each of these 3 layers, I do not know what my actual settings should be for the individual layers itself. Like for the speed it has a default i assume of 6000mm/min and max power of 20%, all the layers have those same default settings. So how do I know what those settings need to be for it to work properly? I appreciate all the information given.
We have a FAQ entry for using 3018’s with LightBurn here:
Go through those to start with, and if you’re still having trouble let us know.
Trial and error, honestly. SainSmart might have some numbers posted for their system that work. The 3018’s have a maximum speed limit that’s lower than most, so many of the power / speed numbers you find for diodes will be too quick for you to use directly.
Yes, you can just type the command in the console like that and press enter. You can also use Edit > Machine Settings to make changes, then click ‘Write’ to commit them to the machine. You’re editing the same things in either case, but the Machine Settings is a little more visual.
Can you tell us what the $100 / $101 settings are? That will dictate how fast the machine can possibly go.
The $110 and $111 settings are the speed limit, so don’t lower them, it just means that if you tell LightBurn to run a job faster than that, it won’t be able to hit the requested speed, so it’ll lower the power output instead.
If your machine uses 800 steps per mm, the fastest you can set the $110 and $111 settings is about 2200 mm/min. GRBL on an 8 bit chip can pulse the steppers at a max of 30000 steps per second. At 800 steps per mm, that’s 37.5 mm/sec, or 2250 mm/minute (37.5 * 60 secs in a minute).
So you should be able to safely set the $110 and $111 settings to 2200, and use that as your fastest speed in LightBurn.
awesome! Thank you so much for your assistance. Now that I have a better understanding with that. What would you suggest be a good starting point for engraving with putting the speed. Right now I have it at 500mm/m speed and 80% power. Is that a good starting point or no?
Also is there a file or anything where i can do like a test engrave with different settings?