I want to engrave a glass with a CO2 laser and a rotary tool. The glass has a circumference of 333mm and my bed is 300mm wide, so I’m getting a message that limits have been exceeded. Is there any other way to fix this besides increasing the bed width in the machine settings? Regards, Hans
Hi Johann,
Absolutely. You are likely getting ALARM:2 in the console window.
Here’s a screenshot of our docs that explains what’s happening:
Your idea to increase the Max Travel with the firmware values $130 or $131will work, but yes, there is a better way 
Temporarily disable the Soft Limits by entering this command in the Console window:
$20=0
Enable them again with$20=1
You can add macros to run these commands:
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Perfect, that’s exactly what I was looking for! Wouldn’t it be possible to activate this when selecting the rotary dial? Thanks for your help!
That is only for GRBL, my Controller is Ruida.
What I do is press the reset button after the rotary is installed and as soon as the haed starts moving toward home hit the cancel button. This causes the Ruida to default to 10,000x, 10,000y, or maybe it’s 1,000x, 1,000y, I’'m not at my machine right now. Either way, using the arrow keys, move the y axis down until you have enough space for your project.
The Y axis Max Travel setting determines the platform size, so you can reset it to whatever you like. It’s in Laser Tools → Machine Settings → Vendor Settings → Y Axis Settings:
Before you change anything, save the machine settings in a file named Linear, so you can return to normal operation. Save the changed settings in a file named Rotary and you can flip between them without omitting That One Little Number.
Edit: When Rotary mode is enabled, my KT332N controller does not home when reset. You can disable Y axis homing in your Rotary configuration to prevent it from trying to home the rotary.
that’s.. not a bad suggestion at all!
I’ll bring it up for discussion.
Someone probably thought of that and it might be harder than we think on some controllers, but I’ll ask.
This is relevant:
For the controllers that support it, LightBurn already writes the settings to the device in the Rotary Setup window. (The controller needs to be restarted after that)