







🎯 Master your CNC craft anywhere, anytime — no PC required!
The RATTMMOTOR CNC GRBL Offline Controller is a compact, injection-molded module designed for 3-axis CNC routers. It enables direct offline control via an LCD screen and physical buttons, supporting simultaneous SD and TF card use with 1GB storage. This controller offers precise axis movement, spindle speed adjustment, and file management without needing a computer connection, making it an essential upgrade for DIY CNC enthusiasts seeking streamlined, professional-grade operation.
| Operating temperature | 25 Degrees Celsius |
| UPC | 769135849662 769135311664 |
| Manufacturer | RTM |
| Package Dimensions | 14.7 x 11.1 x 8.5 cm; 103 g |
| Material type | Plastic |
| ASIN | B07TB6HZY4 |
A**R
Does not read code very well.
Using Lightburn to create and save file. Plugged SD card in and started ok but soon just took off across material with laser on till it hit limit switch. Not overly pleased with that performance
D**L
Took me longer to put it on than it did to get herr
Arrived extremely fast. Exactly as described.
J**G
Works okay
Seems okay but these never last that long.
R**R
It works
A bit small. Be sure to disconnect your USB cable from the computer before using. 3 stars because the connector ribbon cable is short and inconvenient if your machine is in an enclosure.
T**Y
Needs a better pause function
Works well for jogging. But if a problem arises during the engraving it is almost impossible to pick up where you left off.
Trustpilot
3 weeks ago
5 days ago