Customers often ask us how to connect a powerful laser to this or that CNC machine or plotter, if the circuit board of the device does not have a separate power supply for a laser, and the current going through the control board is minimal and does not exceed, for example, 0.5 A.
The DIY и MakeBlock engraver board is powered with 12 v and 0.5-1 А current, not more.
1W diode lasers require 1-2 А и 12 v current; 5 W lasers and higher need more than 3 A.
To mount a more powerful laser on a plotter (such as a MakeBlock XY plotter 2.0 KIT) or on a small Neje engraver additional power supply is needed. It is possible to install a separate battery unit and a driver, for instance.
Connect the laser control to the МК and GND1 pins. The supplied power must not exceed 24 v. Connect the laser «+» to «+12v», the laser «-» to the «Drain» of the field transistor.
The GND1 and GND2 contacts may not be necessarily located on the same line. It is possible to use the «+12V» and «GND2» contacts of the lead-acid battery.
It is enough to have a bread board of 20х20 mm to place all the elements.
12 v lasers with the current up to 5 A.
Use the current powering the DIY or an additional battery unit.
The laser «+» and «-» contacts are controlling and located at the top on the right-hand side of the circuit board picture of the NEJE engraver. Connect them to the «МК» and «GND1» contacts of the Endurance circuit MO 1.
Endurance schematics on a MakeBlock plotter XY 2.0
Anyone can assemble it independently.
We are happy to share useful technologies with the community of laser enthusiasts and laser engraving fans.
Its price is 19.95$ + shipping fee.