Direct Part Marking Machine

DPM-direct part marking (This includes both human readable and data matrix codes)
Marking Methods : Laser, Dot peen, printed labels etc.
Objective : Objective of marking Data matrix along with human readable codes is as under.

• Permanent part identification.
• Machine-readable code.
• Positive identification.
• Aftermarket traceability.
• Not experimental technology – industry standard.
• Improved accuracy of part tracking.
• Ease of data collection.
• Cradle-to-grave traceability.
• No data transcription errors.
• Increased quality with reduced costs through improved efficiency.

Factors which control data matrix code quality and its readability at various stations.

• Proper selection of marking method, depending up on the part to be marked.
• Proper selection of reading systems, this depends up on how good the matrix is marked on the component, what's the ambient light conditions on the factory floor.
• What's the sequence of marking, ideally there should be no operation after marking the matrix.
• Type of reading systems, fixed mount of hand held terminals.

Laser Marking
Laser marking is a non-contact thermal process where the heat generated by the beam alters the surface of the tool. When the temperature is raised in a localized area, carbon will precipitate out along grain boundary areas turning black.
Advantages of laser marking

• Proper selection of marking method, depending up on the part to be marked.
• Proper selection of reading systems, this depends up on how good the matrix is marked on the component, what's the ambient light conditions on the factory floor.
• What's the sequence of marking, ideally there should be no operation after marking the matrix.
• Type of reading systems, fixed mount of hand held terminals.

Dot Peen Marking
This is contact type of marking;where in a carbide pin marks a series of dots to form the matrix. Its also governed by the ECC200 norm for marking.
Advantages of dot Peen marking

• Gives good results of shiny machined surfaces.
• Not suitable for marking on cast/forged surfaces.
• Very cheap initial cost of the equipment as compared to laser system.
• Can be used where washing/cleaning is part of a operational cycle (this is also applicable for laser).

Disadvantages of dot Peen marking

• Codes are marked with very low contrast. (No difference between the matrix and the marked surface, unlike laser).
• High quality optical readers are required which are expensive.
• Lot of moving, reciprocating parts which require periodic maintenance, unlike laser.

Printing
This is again just like a normal sticker printing unit, good for application where outside contact with the part is limited, so that the lable is not getting damaged, very limited application but.
Vendor Selection
Success in implementing a DPM application depends upon many factors that have been outlined in this document. DPM is a very challenging application requiring technology and know-how in solving difficult image analysis problems. Typically, companies experienced in industrial machine vision have the right know-how and technology for providing the highest DPM read rate.The vendor should provide the support necessary to thoroughly qualify your DPM application, and guide you through the considerations necessary to ensure installation success.This can be especially important if the system is commissioned in one location and shipped to another. And finally, the selected supplier should have a successful track record and financial stability to maintain their role as your DPM marking and reading solutions provider for the long term
Verdict
From our experience, we would recommend laser marking where ever possible as it's the only method by which you can get high contrast codes on almost any surface, which improves readability at various levels.In India we have installed more dot peen systems than laser but it's only because of price. If that's not your first criteria then you have got the answer.
Traceability Solutions For Marking, Direct Part Marking Machine, Direct Part Marking Machine Manufacturer, Direct Part Marking Machine Exporter, Direct Part Marking Machine Suppliers

Direct Part Marking Machines manufacture, supply and export in various location like Pune, Mumbai, Chennai, Bangalore, UP, Bihar, West Bengal, Jharkhand, Chhattisgarh, MP, Orissa, Maharashtra, Goa, Karnataka, Andhra Pradesh, Kerala, Tamil Nadu, Telangana, Assam.