3D printer temperature control system

Abstract

The invention discloses a 3D printer temperature control system. The 3D printer temperature control system comprises a bus interface module, a register file, a PID operation module and a temperature acquisition module which are sequentially connected, wherein the PID operation module is also connected with a heating module; the temperature acquisition module judges acquired temperature; if the acquired temperature is not out of range, temperature data is sent to the PID operation module; after calculation of the PID operation module is completed, an effective signal and PID control quantity are output to the heating module; the heating module adopts a PWM mode for heating; heating time is controlled by virtue of a PWM method according to the PID control quantity; the PID operation module is divided into four parts, namely scale operation, integration operation, differential operation and PID result operation; PID operation result is completed after six cycles. The 3D printer temperature control system disclosed by the invention has the advantages that PID operation result can be output once every six cycles by virtue of the PID operation module, and the heating module adopts a novel PWM hardware structure, so that real-time property, accuracy and stability of temperature control are effectively improved, CPU load is reduced, and function extension of the 3D printer can be facilitated.

Description

technical field [0001] The invention relates to the field of temperature control, in particular to a 3D printer temperature control system. Background technique [0002] PID control has the characteristics of simple structure, easy understanding, convenience and practicality, so it is still widely used in temperature control systems. PID control actually uses proportional control, integral control and differential control three control calculation methods. The PID control operation takes the difference between the target temperature and the real-time temperature as input, and obtains the control output through proportional, integral, and differential operations respectively. The output quantity is used as the input quantity of the control actuator to judge whether to heat or cool through the PWM method. The PWM (Pulse Width Modulation) control is a pulse width modulation technology, which can equivalently obtain the required waveform (including shape and amplitude) by modu...

AI Technical Summary

Problems solved by technology

This will undoubtedly greatly increase the workload of the CPU, and it will easily lead to conflicts with the response of the motion control interrupt program, causing the program to run away and cause work interruption.

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