Abstract:

The design of laser marking controller based on DSP is introduced in this paper.TMS320F2812 DSP is selected as the processor of this system,and CPLD is used to extend I/Os,USB interface to transfer data,and high speed D/A convert control scanners to rotate.In terms of the D/A converting circuit,aimed to attain bipolar voltage references,operational amplifier MCP606 and MCP1525 is used to produce ±2.5 V high precision voltage reference.Graphics and characters are separated in the marking software to show the change in word size and font precisely.The design of both hardware and software are elaborated in detail.The controller improves the speed and precision of laser marking.

Key words: laser marking;controller;DSP;D/A convert