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CN-121973446-A - Control device of 3D printer, control method of control device, 3D printer and storage medium

CN121973446ACN 121973446 ACN121973446 ACN 121973446ACN-121973446-A

Abstract

The application discloses a control method of a 3D printer, wherein the 3D printer comprises a first switch and a first heating module which are connected in series to form a first branch, a second switch and a second heating module which are connected in series to form a second branch, and the first branch and the second branch are connected in parallel to a commercial power grid. The heating power of the two heating modules in the heating-up stage is larger than that in the temperature maintaining stage. The control method comprises the steps of respectively sending a first control signal and a second control signal to a first switch and a second switch when two heating modules are in a heating stage, respectively sending a third control signal and a fourth control signal to the first switch and the second switch after the two heating modules reach respective target temperatures, wherein the duty ratio of the third control signal and the duty ratio of the fourth control signal are respectively smaller than those of the first control signal and the second control signal, the second control signal and the fourth control signal are periodic control signals, and in a unit control period, the on-off time of the first switch controlled by the third control signal is respectively different from the on-off time of the second switch controlled by the fourth control signal.

Inventors

  • LIU HONGBO
  • WU HAOXUAN

Assignees

  • 深圳拓竹科技有限公司

Dates

Publication Date
20260505
Application Date
20251203

Claims (12)

  1. 1. A control method of a 3D printer is characterized in that the 3D printer comprises a first switch, a first heating module, a second switch and a second heating module, the first switch and the first heating module are connected in series to form a first branch, the second switch and the second heating module are connected in series to form a second branch, the first branch and the second branch are connected with a mains supply grid in parallel, the first heating module and the second heating module comprise a heating stage and a temperature maintaining stage, heating power required by the first heating module in the heating stage is larger than heating power required by the second heating module in the temperature maintaining stage, and heating power required by the second heating module in the heating stage is larger than heating power required by the second heating module in the temperature maintaining stage, and the control method comprises the following steps: under the condition that the first heating module and the second heating module are in a heating stage, a first control signal and a second control signal are respectively sent to the first switch and the second switch; acquiring the temperature of the first heating module, and after the temperature of the first heating module reaches a first target temperature, sending a third control signal to the first switch so as to enable the first heating module to be in a temperature maintenance stage, wherein the duty ratio of the third control signal is smaller than that of the first control signal; Acquiring the temperature of the second heating module, and after the temperature of the second heating module reaches a second target temperature, sending a fourth control signal to the second switch so as to enable the second heating module to be in a temperature maintenance stage, wherein the duty ratio of the fourth control signal is smaller than that of the second control signal; The third control signal and the fourth control signal are periodic unit control signals, in a unit control period, the moment when the third control signal controls the first switch to be turned on is a first moment, the moment when the first switch is controlled to be turned off is a second moment, the moment when the fourth control signal controls the second switch to be turned on is a third moment, the moment when the fourth control signal controls the first switch to be turned off is a fourth moment, the first moment is different from the third moment, and the second moment is different from the fourth moment.
  2. 2. The control method of claim 1, wherein the 3D printer comprises a hot bed heating module, a cavity heating module, and a hot end heating module; The first heating module and the second heating module are any two different heating modules of the hot bed heating module, the cavity heating module and the hot end heating module.
  3. 3. The control method according to claim 1, wherein a relation between a heating power P12 required for the first heating module in the temperature maintaining stage and a heating power P22 required for the second heating module in the temperature maintaining stage is 1% to 20% (P12-P22)/P12%.
  4. 4. The control method according to claim 1, wherein when a sum of duty ratios of the third control signal and the fourth control signal is equal to 1, the third control signal controls a timing at which the first switch is turned on, the fourth control signal controls a timing at which the second switch is turned off, and the third control signal controls a timing at which the first switch is turned off, and the fourth control signal controls the second switch to be turned on.
  5. 5. The control method according to claim 1, wherein in the case where a sum of duty ratios of the third control signal and the fourth control signal is smaller than 1, the first switch and the second switch have a case of being simultaneously in an off state in the unit control period.
  6. 6. The control method according to claim 1, wherein in the case where a sum of duty ratios of the third control signal and the fourth control signal is greater than 1, the first switch and the second switch have a case of being simultaneously in an on state in the unit control period.
  7. 7. A control method according to any one of claims 1-6, characterized in that the unit control period comprises a plurality of successive small control periods, each comprising three half waves.
  8. 8. The control method according to claim 7, characterized in that three half-waves in the small control period include a first half-wave, a second half-wave, and a third half-wave; Under the condition that the duty ratio of the third control signal and the fourth control signal is 1/3, a first half wave in each small control period of the third control signal is used for controlling the first switch to be turned on, and a second half wave and a third half wave in each small control period of the third control signal are used for controlling the first switch to be turned off; The first half wave and the second half wave in each small control period of the fourth control signal are used for controlling the second switch to be turned off, and the third half wave in each small control period of the fourth control signal is used for controlling the second switch to be turned on.
  9. 9. The control method according to claim 7, characterized in that three half-waves in the small control period include a first half-wave, a second half-wave, and a third half-wave; Under the condition that the duty ratio of the third control signal and the fourth control signal is 1/3, a first half wave in each small control period of the third control signal is used for controlling the first switch to be turned on, and a second half wave and a third half wave in each small control period of the third control signal are used for controlling the first switch to be turned off; The first half wave and the third half wave in each small control period of the fourth control signal are used for controlling the second switch to be turned off, and the second half wave in each small control period of the fourth control signal is used for controlling the second switch to be turned on.
  10. 10. A control device of a 3D printer, wherein the 3D printer comprises: The control device comprises a first switch, a first heating module, a second switch and a second heating module, wherein the first switch is connected with the first heating module in series to form a first branch, the second switch is connected with the second heating module in series to form a second branch, the first branch is connected with a mains supply power grid in parallel to the second branch, the first heating module and the second heating module comprise a heating stage and a temperature maintaining stage, the heating power required by the first heating module in the heating stage is larger than the heating power required by the first heating module in the temperature maintaining stage, the heating power required by the second heating module in the heating stage is larger than the heating power required by the second heating module in the temperature maintaining stage, and the control device comprises: A transmitting module configured to transmit a first control signal and a second control signal to the first switch and the second switch, respectively, in a case where the first heating module and the second heating module are in a temperature increasing stage, and An acquisition module configured to acquire a temperature of the first heating module; the sending module is further configured to send a third control signal to the first switch after the temperature of the first heating module reaches a first target temperature, such that the first heating module is in a temperature maintenance phase, the third control signal having a duty cycle that is less than a duty cycle of the first control signal; the acquisition module is further configured to acquire a temperature of the second heating module; The sending module is further configured to send a fourth control signal to the second switch after the temperature of the second heating module reaches a second target temperature to cause the second heating module to be in a temperature maintenance stage; The third control signal and the fourth control signal are periodic unit control signals, in a unit control period, the moment when the third control signal controls the first switch to be turned on is a first moment, the moment when the first switch is controlled to be turned off is a second moment, the moment when the fourth control signal controls the second switch to be turned on is a third moment, the moment when the second switch is controlled to be turned off is a fourth moment, the first moment is different from the third moment, and the second moment is different from the fourth moment.
  11. 11. A3D printer, characterized in that the 3D printer comprises a memory configured to store a computer program and a processor that, when executing the computer program, implements the control method according to any one of claims 1-9, or, The 3D printer comprising the control device of claim 10.
  12. 12. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the control method of any one of claims 1-9.

Description

Control device of 3D printer, control method of control device, 3D printer and storage medium Technical Field The application relates to the technical field of 3D printing, in particular to a control method of a 3D printer, a control device of the 3D printer, the 3D printer and a computer readable storage medium. Background The 3D printer can access the heating module to a 220V commercial power grid in the material heating stage, so that the temperature of the heating module is quickly raised to the target temperature capable of melting the printing material. And after the temperature of the heating module is raised to the target temperature, the 3D printer controls the heating module to be intermittently turned on and off at a frequency so that the temperature of the heating module is maintained within a temperature range capable of melting the printing material. Because at least two heating modules are usually arranged in the 3D printer, the heating modules are loads with larger impedance, so that a commercial power grid can be frequently connected with at least two loads with larger impedance, and further serious flickering phenomenon of a lighting lamp connected with the 3D printer in the same circuit loop is caused, the flickering phenomenon can cause spasm of people suffering from photosensitive epilepsy, and the use experience of users is seriously affected. Disclosure of Invention Based on the above problems, the embodiments of the present application provide a control method of a 3D printer, a control device of a 3D printer, and a computer readable storage medium. In a first aspect, the application provides a control method of a 3D printer, the 3D printer comprises a first switch, a first heating module, a second switch and a second heating module, the first switch and the first heating module are connected in series to form a first branch, the second switch and the second heating module are connected in series to form a second branch, the first branch and the second branch are connected in parallel to a mains supply grid, the first heating module and the second heating module comprise a heating stage and a temperature maintaining stage, heating power required by the first heating module in the heating stage is larger than heating power required by the second heating module in the temperature maintaining stage, and heating power required by the second heating module in the heating stage is larger than heating power required by the second heating module in the temperature maintaining stage, the control method comprises: under the condition that the first heating module and the second heating module are in a heating stage, a first control signal and a second control signal are respectively sent to the first switch and the second switch; acquiring the temperature of the first heating module, and after the temperature of the first heating module reaches a first target temperature, sending a third control signal to the first switch so as to enable the first heating module to be in a temperature maintenance stage, wherein the duty ratio of the third control signal is smaller than that of the first control signal; Acquiring the temperature of the second heating module, and after the temperature of the second heating module reaches a second target temperature, sending a fourth control signal to the second switch so as to enable the second heating module to be in a temperature maintenance stage, wherein the duty ratio of the fourth control signal is smaller than that of the second control signal; The third control signal and the fourth control signal are periodic unit control signals, in a unit control period, the moment when the third control signal controls the first switch to be turned on is a first moment, the moment when the first switch is controlled to be turned off is a second moment, the moment when the fourth control signal controls the second switch to be turned on is a third moment, the moment when the fourth control signal controls the first switch to be turned off is a fourth moment, the first moment is different from the third moment, and the second moment is different from the fourth moment. In some embodiments, the 3D printer comprises a hot bed heating module, a cavity heating module and a hot end heating module, wherein the first heating module and the second heating module are any two different heating modules of the hot bed heating module, the cavity heating module and the hot end heating module. In some embodiments, the relation between the heating power P12 required by the first heating module in the temperature maintaining stage and the heating power P22 required by the second heating module in the temperature maintaining stage is 1% to 20% (P12-P22)/P12%. In some embodiments, when the sum of the duty ratios of the third control signal and the fourth control signal is equal to 1, the third control signal controls the on time of the first switch, the fourth control signal controls the