Which laser suits photos on metal plates
For black anodised aluminium, a MOPA fiber laser (1064 nm, adjustable pulse) is the usual choice. A MOPA fiber laser is a fiber source with adjustable pulse width. That control gives darker marks on anodised aluminium, grey tones for photos, cleaner marks on plastics and colour effects on stainless steel.
Like any fiber source, a MOPA laser does not suit wood, leather, clear glass or clear acrylic.
Setting up the job
A MOPA fiber source varies pulse width to create grey tones on black anodised aluminium, which is what makes a detailed photo possible. A standard Q-switched source gives mostly white-only marks.
What to check before you buy
- Material match. Confirm every material you plan to sell (black anodised aluminium) with a test mark before deciding on the laser source.
- Marking area. Small parts need a jig so every piece sits in the same position. A good jig increases output more than extra laser power.
- Power. 20 W to 60 W MOPA sources are common. A MOPA source costs more than a standard Q-switched fiber source of the same power, so pay for it only when your products need what it does.
- Software. Check that the software imports vector files and name lists from a spreadsheet, and handles photo engraving if you plan to offer it.
- Fume extraction. Every laser marking job releases smoke or fine particles. Budget for a proper extractor and ventilation from day one.
- Power supply. Use a voltage stabiliser or online UPS. Unstable supply can damage the laser source and controller.
- Safety. Open galvo markers need protective eyewear rated for the laser's wavelength, or an enclosure. Never laser PVC, vinyl or unknown plastics, because some release corrosive and toxic gas.
Running this work in Chennai
Metal photo plates outlast printed photographs on awards and mementos.
Chennai's schools, colleges and sports associations run annual days and tournaments through the year, giving trophy makers repeat orders. Chennai's gifting trade runs through retail markets such as T. Nagar and Parry's, the corporate offices along OMR and Guindy that buy gifts in bulk, and the marriage halls across the city that create return gift orders every muhurtham season.
NMB Enterprises is a laser marking machine distributor in Chennai, based at Poonamallee, so buyers in the city can reach the team directly to discuss their product and the machine that suits it.