This invention discloses an automatic maintenance and cleaning method and
system for multiple printheads of a
plotter based on FPGA control, belonging to the field of
inkjet printing equipment control technology. The method includes: the FPGA main control board and each FPGA printhead control board completing hardware self-tests and
bidirectional communication handshakes, using 8B / 10B encoding for
data transmission; upon receiving a cleaning command, sequentially executing the entire automated maintenance process of initial ink intake,
grating closed-
loop control of the doctor blade, multi-printhead synchronous flash printing, secondary ink intake, and printhead moisturizing. It adopts an FPGA distributed
hardware architecture, achieving communication between the main control board and the printhead board group via
fiber optic links, and constructing a fully closed-loop
position control system in conjunction with a
grating feedback module. This invention features high real-time performance, strong synchronization, and high anti-interference capability, enabling non-destructive, efficient, and automated maintenance of multiple printheads, effectively reducing the probability of
nozzle clogging, extending printhead lifespan, and is suitable for high-precision applications in industrial large-format inkjet plotters.