Z-axis falling prevention control device of gantry three-dimensional printer

Abstract

The invention provides a Z-axis falling prevention control device of a gantry three-dimensional printer. Through a switching power supply, an external power supply is connected to a power module and split into three ways, the first way is to provide power for a motor brake through a relay, the second way is to supply power to an Z-axis motor of the gantry three-dimensional printer through an unidirectional conductive device, the third way is split into two sub-ways through a unidirectional conductive device, one sub-way is connected with a storage battery, and the other sub-way supplies powerto the Z-axis motor through another relay and a unidirectional conductive device. The delayed power supply time of the relays is greater than the outage brake close delay time of the Z-axis motor andis greater than the electrification self-locking delay time of the Z-axis motor. According to the Z-axis falling prevention control device of the gantry three-dimensional printer, the stable state ofa Z-axis cross beam can be kept when the gantry three-dimensional printer is started, stopped and suddenly disconnected from the power supply, and printed products and the printer are prevented from being damaged.

Description

technical field [0001] The invention belongs to the field of advanced control technology and relates to an anti-drop control device. Background technique [0002] The gantry frame structure has been widely used in the design of medium and large 3D printers. In this structure, the print head is installed on the belt drive module of the beam, and the entire Z-axis module includes the print head, beam, module, X-direction motor and accessories, etc., with a total weight of about 6Kg. In the traditional structural design, factors such as safety, smooth movement, and precision in the operation of the equipment are also considered comprehensively. Therefore, when selecting the Z-direction motor, a motor with a brake function is used. The purpose is to realize the shutdown of the equipment while the power is off. The brake locks the motor shaft to prevent the Z-axis beam from falling. When the power is turned on, the brake pad releases the shaft. At the same time, the motor is sel...

AI Technical Summary

Problems solved by technology

[0003] However, in practical applications, when the brake system is powered off, there is a short-term delay in the action of the brake, and the motor shaft cannot be locked in time, and the beam will drop to a certain height under the action of its own weight.

In the same way, when starting up, the device is powered by a switching power supply connected to the mains. At this time, the Z-axis motor is powered on and maintains a self-locking state, but in fact there is a delay of 0.1s from power-on to self-locking of the motor. The brake releases the motor shaft, which causes the shaft to be released in a free state within 0.1s. It will also cause the beam to drop to a certain height, which may lead to the scrapping of parts in light cases, and damage to the equipment platform and print head in severe cases.

Therefore, when designing a safety plan, it is necessary to ensure the normal operation of the equipment in the power-on state, and to ensure that the beam does not drop when the equipment is suddenly powered off or shut down. At present, there are no relevant reports at home and abroad to solve the above problems

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