CN114603859A

CN114603859A - Measuring method, calibrating method and device of double-nozzle 3D printer and storage medium

Info

Publication number: CN114603859A
Application number: CN202210525764.7A
Authority: CN
Inventors: 唐京科; 龚波; 谢凌杰
Original assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Current assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-06-10
Anticipated expiration: 2042-05-16
Also published as: CN114603859B

Abstract

The invention relates to the technical field of 3D printing, in particular to a measuring method, a calibrating method and a device of a double-nozzle 3D printer and a storage medium. The measuring method comprises the following steps: the method comprises the steps of firstly obtaining first displacement along the X direction when a first spray head moves from an initial position to a target position, and then obtaining second displacement along the X direction when a second spray head moves from the initial position to the target position, wherein the difference value of the first displacement and the second displacement is the relative distance between the first displacement and the second displacement. Compared with a mode of manually measuring the distance between the two spray heads, the measuring method of the double-spray-head 3D printer provided by the invention has the advantages that manual operation is not needed, the automation degree is higher, the operation difficulty is low, the measuring precision can be ensured, the problem that the existing spray head measuring mode is limited by operation experience and the measuring error greatly affects the calibration precision is solved, the measuring precision is improved, the distance between the two spray heads is ensured to be within a preset range, the printing process is accurately controlled, and the printing quality and the success rate are further ensured.

Description

Measuring method, calibrating method and device of double-nozzle 3D printer and storage medium

Technical Field

The invention relates to the technical field of 3D printing, in particular to a measuring method, a calibrating method and a device of a double-nozzle 3D printer and a storage medium.

Background

3D printing technology (i.e., rapid prototyping technology) has been rapidly developed for its many advantages over existing subtractive processes. With the development of the technology, those skilled in the art research and develop various types of dual-nozzle 3D printers to realize dual-color printing or itemized printing of special supporting materials and model materials.

For a dual-nozzle 3D printer, two nozzles are fixedly arranged on the same movement axis and move together in the printing process. Therefore, the distance between the two nozzles needs to be controlled within a preset range to accurately control the printing process. In fact, the position of the nozzle can be changed slightly due to vibration after the nozzle is used for a period of time, and the position of the nozzle can not be completely consistent with the original position after the nozzle is overhauled and replaced every time, so that the printing nozzle needs to be calibrated regularly, namely, the two nozzles are positioned again, and the distance between the two nozzles is determined, so that compensation parameters are provided for a printing main control system to calibrate the two nozzles, and the quality and the success rate of double-color printing or double-material printing are ensured.

The existing spray head measuring method generally adopts a manual measuring mode, and utilizes a calibration tool to measure and calibrate the distance between two spray heads and the relative height of the two spray heads, so that the manual measurement has the problem of large error, and the manual measurement is greatly influenced by personal experience, and the calibration error is large, thereby influencing the actual printing quality.

Disclosure of Invention

Therefore, the measuring method of the dual-nozzle 3D printer is needed to solve the problem that the printing quality is affected by a large calibration error in the conventional dual-nozzle measuring method.

A measuring method of a double-nozzle 3D printer comprises the following steps:

acquiring displacement S1 along the X direction when a first spray head of the spray head group moves from a first initial position to a first preset position;

acquiring displacement S3 along the X direction when a second spray head of the spray head group moves from a second initial position to the first preset position; when the first spray head is located at the first initial position, the second spray head is located at the second initial position;

a first difference of displacement S1 and displacement S3 is calculated.

In one embodiment, the measurement method of the dual-nozzle 3D printer further comprises the following steps:

acquiring displacement S2 along the Y direction when the first spray head moves from the first initial position to a second preset position;

Acquiring displacement S4 of the second spray head along the Y direction when the second spray head moves from the second initial position to the second preset position;

a second difference of the displacement S2 and the displacement S4 is calculated.

In one embodiment, the step of obtaining the displacement S1 in the X direction when the first nozzle moves from the first initial position to the first preset position further includes:

the first driving piece drives the first spray head to move to a position with the coordinate of (0, Y1) along the reverse direction of the X direction; the second driving piece drives the first spray head to move from the position with the coordinate (0, Y1) to the position with the coordinate (0, 0) along the reverse direction of the Y direction; or

The second driving piece drives the first spray head to move to a position with coordinates (X1, 0) along the reverse direction of the Y direction; the first driving member drives the first spray head to move from the position with the coordinate (X1, 0) to the position with the coordinate (0, 0) along the direction opposite to the X direction.

In one embodiment, the step of moving the first nozzle from the first initial position to the first preset position further comprises: and placing a positioning piece on the hot bed platform, wherein the first preset position is one end of the positioning piece along the X direction, and the second preset position is one end of the positioning piece along the Y direction.

In one embodiment, one of the positioning member and the nozzle group is connected with a negative voltage, the other one of the positioning member and the nozzle group is connected with a positive voltage, and when the positioning member is contacted with the nozzle group, the nozzle group stops moving.

In one embodiment, the step of moving the first spray head from the first initial position to the first preset position comprises:

s111, moving the first spray head to a first position from the first initial position along the X direction by a first distance;

s112, the first spray head moves from the first position to a second position along the Y direction by a second distance;

s113, moving the first nozzle from the second position to a third position along the opposite direction of the X direction by a first distance;

s114, moving the first spray head from the third position to a fourth position along the Y direction by a second distance;

and repeating the steps S111 to S114 in sequence until the first spray head contacts with the positioning piece.

In one embodiment, the step of moving the first nozzle from the first initial position to a second predetermined position comprises;

the first spray head moves from the first initial position to a fifth position along the X direction by a distance of S1; and the first spray head moves along the Y direction from the fifth position until the first spray head is contacted with the positioning piece.

A calibration method of a dual-nozzle 3D printer comprises the measurement method and further comprises the following steps:

and taking the first difference value as a distance compensation parameter of the first spray head and the second spray head and feeding back the distance compensation parameter to a control system, and calibrating the distance error of the first spray head and the second spray head through the control system.

A calibrating device of dual spray 3D printer includes:

the acquiring unit is used for acquiring first displacement and second displacement along the X direction when the first spray head and the second spray head respectively move from a first initial position and a second initial position to a first preset position; when the first spray head is located at the first initial position, the second spray head is located at the second initial position;

a calculation unit for calculating difference information of the first displacement and the second displacement;

and the calibration unit is used for calibrating the distance error between the first spray head and the second spray head according to the difference information.

A computer readable storage medium having stored thereon a calibration program of a dual-nozzle 3D printer, which when executed by a processor, implements the calibration method of the dual-nozzle 3D printer as described above.

The technical scheme has the following beneficial effects: according to the measuring method of the double-nozzle 3D printer, the first displacement of the first nozzle in the X direction when the first nozzle moves from the initial position to the target position is obtained, the second displacement of the second nozzle in the X direction when the second nozzle moves from the initial position to the target position is obtained, and the difference value between the first displacement and the second displacement is the relative distance between the first displacement and the second displacement. Compared with a mode of manually measuring the distance between the two spray heads, the measuring method of the double-spray-head 3D printer provided by the invention has the advantages that manual operation is not needed, the automation degree is higher, the operation difficulty is low, the measuring precision can be ensured, the problem that the existing spray head measuring mode is limited by operation experience and the measuring error greatly affects the calibration precision is solved, the measuring precision is improved, the distance between the two spray heads is ensured to be within a preset range, the printing process is accurately controlled, and the printing quality and the success rate are further ensured.

Drawings

Fig. 1 is a flowchart of a measurement method of a dual-nozzle 3D printer according to an embodiment of the present invention;

FIG. 2 is a schematic view of a group of spray heads in an arbitrary position;

FIG. 3 is a schematic view illustrating the first nozzle touches the positioning element from the X direction and the Y direction, respectively;

FIG. 4 is a schematic view illustrating the second nozzle touches the positioning element from the X direction and the Y direction, respectively;

Fig. 5 is a schematic movement diagram of the first nozzle moving from the first initial position to the first predetermined position.

Reference numerals are as follows: 110-a first showerhead; 120-a second showerhead; 130-positioning element.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

For a double-nozzle 3D printer, the double-nozzle structure is fixedly arranged on the same motion shaft and moves together to work in the printing process, so that the problems of mutual interference and mutual restriction exist. When the main nozzle prints, the auxiliary nozzle is in a pause state and is subjected to cooling treatment, and when the auxiliary nozzle prints, the main nozzle is in a pause state and is subjected to cooling treatment. Although the time for each pause of the main and auxiliary nozzles is short, for a large-size printing model, if the time cannot be accurately controlled, the overall printing time is still prolonged, and the printing efficiency is affected. Meanwhile, during the suspension of the main and sub-heads, even if the temperature is lowered, there is still a possibility that a little flow occurs (the head where the flow occurs is called a flow head). This phenomenon causes the following problems: when the fluid material nozzle begins to print, because the nozzle has the material that already is solid state, the fluid material of nozzle limit is very easily wiped to the model limit during printing, can strike the shaping material even to cause the phenomenon of printing the staggered floor or splitting between the layer, and then influence printing quality.

In addition, its position can change because of the vibration after the shower nozzle uses for a period of time, and after overhauing at every turn, changing the shower nozzle, the shower nozzle position also can't keep the complete unanimity with the original position, this just needs regularly to print the shower nozzle and measure to adjust the interval between two shower nozzles according to measuring result, with guarantee printing quality and success rate. The existing spray head measuring method generally adopts a manual measuring mode, and utilizes a calibration tool to measure and calibrate the distance and the height between two spray heads, so that the problem of large error exists in manual measurement. In order to solve the above problems, the inventive concept of the present application is then conceived.

As shown in fig. 1 and fig. 2, a measuring method of a dual-nozzle 3D printer according to an embodiment of the present invention includes:

in step 110, the displacement S1 along the X direction when the first nozzle 110 of the nozzle group moves from the first initial position to the first preset position is obtained.

Specifically, as shown in fig. 2, a coordinate axis is established with a plane of a thermal bed of the 3D printer as a reference plane, wherein a long side of the thermal bed is an X-axis of the coordinate axis, a short side of the thermal bed is a Y-axis of the coordinate axis, and a corner position of a lower left corner of the thermal bed is an O-point which is an origin of the coordinate axis. The first and

second heads

110 and 120 each have a protruding point position, and when the protruding point position of the first head 110 is located at the first initial position, the first head 110 is considered to be located at the first initial position.

The first nozzle 110 and the second nozzle 120 are both mounted on the same motion shaft, a driving mechanism is arranged at the motion shaft, the driving mechanism comprises a first driving piece and a second driving piece, and power output ends of the first driving piece and the second driving piece are both connected with the motion shaft. The first driving member drives the nozzle group to move along the X direction (i.e., OX direction shown in fig. 2) or along the opposite direction of the X direction (i.e., XO direction shown in fig. 2) through the movement axis, and the second driving member is used for driving the nozzle group to move along the Y direction (i.e., OY direction shown in fig. 2) or along the opposite direction of the Y direction (i.e., YO direction shown in fig. 2). The first driving piece is specifically a first stepping motor, and when the first stepping motor rotates forwards, the spray head group moves along the OX direction; when the first stepping motor rotates reversely, the nozzle group moves along the XO direction, the first stepping motor rotates forward by a certain angle and rotates reversely by a certain angle to form a corresponding step length, when the first nozzle 110 moves from the first initial position to the first preset position, the step length corresponding to the forward rotation and the step length corresponding to the reverse rotation of the first stepping motor are obtained, the difference value of the two step lengths is calculated, and the displacement S1 of the first nozzle 110 moving along the X direction can be obtained.

As shown in fig. 3, in an embodiment, a rectangular positioning element 130 is fixedly disposed at a position of the heat bed, the position may be any position except the origin, and the first predetermined position may be an end of the positioning element 130 along the X direction. As shown in fig. 3, when the long side of the positioning member 130 is parallel to the X axis and the short side is parallel to the Y axis, and the first nozzle 110 moves to contact with the short side of the positioning member 130, that is, the protruding point of the first nozzle 110 coincides with the short side of the positioning member, it is determined that the first nozzle 110 reaches the first preset position. By introducing the positioning element 130, whether the first nozzle 110 moves to the first preset position can be better determined, and the accuracy of moving the first nozzle 110 to the target position can be further ensured.

Specifically, the positioning element 130 has an extremely low negative voltage, the first nozzle 110 and the second nozzle 120 in the nozzle group both have an extremely low positive voltage, when the driving mechanism drives the first nozzle 110 or the second nozzle 120 to contact the positioning element 130, the circuit is switched on to form a loop, and a loop signal is fed back to the control system, so that the control system controls the driving mechanism to stop operating, and further controls the nozzle group to stop moving, thereby accurately obtaining the displacement of the first nozzle or the second nozzle moving to the target position.

As shown in fig. 2 and 3, in one embodiment, the first initial position is an origin position, and before obtaining the displacement of the first nozzle 110 in the X direction from the first predetermined position, if the first nozzle 110 is not located at the origin position, the first nozzle 110 is subjected to a zero operation.

Specifically, when the first nozzle 110 is not located at the origin position, the coordinates of the first nozzle 110 are (X1, Y1), and therefore, the first nozzle 110 may be driven by the first driving element to move along the XO direction until the first nozzle 110 moves to the position with coordinates (0, Y1), i.e., the Y axis. Then, the second driving member is operated to move the first head 110 from the position with coordinates (0, Y1) to the origin position which is the position with coordinates (0, 0) in the YO direction. Specifically, a first in-place sensor and a second in-place sensor are respectively arranged on the X axis and the Y axis, when the first nozzle 110 touches the first in-place sensor or the second in-place sensor, it is indicated that the first nozzle 110 moves to the X axis or the Y axis, and the two in-place sensors give signals to stop the driving mechanism and stop the movement of the nozzle group.

In another embodiment, the zeroing operation may be performed by first driving the first nozzle 110 to move to the position with the coordinate of (X1, 0) along the YO direction by the second driving member, and then driving the first nozzle 110 to move from the position with the coordinate of (X1, 0) along the XO direction to the origin position by the first driving member.

As shown in fig. 5, in one embodiment, when the first initial position is the origin position, the step of moving the first nozzle 110 from the first initial position to the first preset position specifically includes:

s111, the first spray head 110 moves from the original position to a first position along the X direction, namely the OX direction;

s112, the first nozzle 110 moves from the first position to the second position along the Y direction, i.e. the OY direction, by a second distance;

s113, moving the first nozzle 110 from the second position to a third position along a direction opposite to the X direction, i.e. along the XO direction;

s114, the first nozzle 110 moves from the third position to the fourth position along the Y direction, namely the OY direction, by a second distance;

the steps S111 to S114 are sequentially repeated until the first nozzle 110 contacts the positioning member 130.

Since the coordinates of the positioning member 130 are unknown, and the first nozzle 110 can not contact the positioning member 130 only by moving in one direction, the first nozzle 110 is controlled to move along the S-shaped track. The first distance is the length of the hot bed, the second distance is smaller than the width of the positioning member 130, and the single movement distance of the first nozzle 110 along the Y direction is smaller than the width of the positioning member 130, so that the risk that the first nozzle 110 does not contact the positioning member 130 when moving along the S-shaped track can be reduced. It is understood that when S114 is completed and S111 is performed again, the first showerhead 110 should be moved in the OX direction from the fourth position. It should be noted that, when the positioning member 130 is located on the path of the first nozzle 110 along the current moving direction in the execution of S111 and S113, the moving distance of the first nozzle 110 should be smaller than the first distance, that is, the first nozzle 110 has already contacted with one end of the positioning member 130 along the X direction when the moving distance along the X direction does not reach the first distance.

When the displacement S1 of the first head 110 in the X direction is acquired, step S120 of acquiring the displacement S3 of the second head 120 of the head group in the X direction when moving from the second initial position to the first preset position is performed. When the first nozzle 110 is located at the first initial position, the second nozzle 120 is located at the second initial position. It is understood that before the displacement S3 of the second nozzle 120 is obtained, the nozzle group is zeroed, that is, the first nozzle 110 is controlled by the driving mechanism to move to the first initial position, and then the second nozzle 120 correspondingly moves to the second initial position.

Specifically, the movement path of the second nozzle 120 moving from the second initial position to the first preset position may refer to the movement path of the first nozzle 110 moving from the first initial position to the first preset position, and includes:

step 121, the first driving member rotates forward to drive the second nozzle 120 to move a first distance from the second initial position along the OX direction; step 122, the second driving member rotates forward to drive the second driving member to move a second distance along the OY direction; step 123, the first driving element rotates reversely to drive the second nozzle 120 to move a first distance along the direction XO; step 124, the second driving member rotates forward to drive the second nozzle to move a second distance along the OY direction, and steps 121 to 124 are repeated in sequence until the second nozzle 120 contacts the positioning member 130. The difference between the step length corresponding to the forward rotation and the step length corresponding to the reverse rotation of the first driving member is calculated to obtain the displacement S3 of the second nozzle along the X direction.

After the displacement S1 of the first nozzle 110 moving from the first initial position to the first predetermined position and the displacement S3 of the second nozzle 120 moving from the second initial position to the first predetermined position are obtained, step 130 is executed to calculate a first difference between the displacement S1 and the displacement S3, where the first difference is a distance between the first nozzle 110 and the second nozzle 120 in the X direction.

In one embodiment, the measuring method of the dual-nozzle 3D printer can also realize the distance measurement between the first nozzle 110 and the second nozzle 120 along the Y direction, and specifically includes the following steps:

in step 140, a displacement S2 along the Y direction when the first nozzle 110 moves from the first initial position to the second predetermined position is obtained.

Specifically, as shown in fig. 3, the second preset position may be an end of the positioning element 130 along the Y direction. Since the displacement S1 of the first nozzle 110 in the X direction has been obtained through the foregoing steps, that is, the X coordinate of the positioning member 130 is known, when the first driving member drives the first nozzle 110 to move from the first initial position to the fifth position in the OX direction by the distance S1, the first nozzle is located below the positioning member; the second driving member drives the first nozzle 110 to move a third distance along the OY direction from the fifth position to contact with one end of the positioning member 130 along the Y direction, where the third distance is a displacement S2. Specifically, the second driving member is a second stepping motor, when the second stepping motor rotates forward by a certain angle, the nozzle group moves along the OY direction, and when the second stepping motor rotates forward by a certain angle, the corresponding step length exists, and when the first nozzle 110 moves from the first initial position to the first preset position, the step length corresponding to the forward rotation of the second stepping motor is obtained, so that the displacement S2 of the first nozzle 110 moving along the Y direction can be obtained.

As shown in fig. 4, after the displacement S2 of the first nozzle 110 in the Y direction is obtained, step 150 of obtaining a displacement S4 of the second nozzle 120 in the Y direction when moving from the second initial position to the second preset position is performed.

Specifically, the first driving element drives the second nozzle to move along the X direction by a distance S3 to a sixth position, and then the second driving element drives the second nozzle to move along the Y direction by a fourth distance from the sixth position until the second nozzle contacts with one end of the positioning element 130 along the Y direction, and the fourth distance is a displacement S4. It should be noted that the ends of the first nozzle 110 and the second nozzle 120 contacting the positioning member 130 are the same, that is, the first nozzle 110 moves to contact the lower end of the positioning member 130 and then stops moving, and the second nozzle 120 also moves to contact the lower end of the positioning member 130 and then stops moving.

After obtaining the displacement S2 of the first nozzle 110 moving from the first initial position to the second predetermined position and the displacement S4 of the second nozzle 120 moving from the second initial position to the second predetermined position, step 160 is executed to calculate a second difference between the displacement S2 and the displacement S4, where the second difference is the distance between the first nozzle 110 and the second nozzle 120 along the Y direction.

In the measuring method of the dual-nozzle 3D printer, a first displacement along the OX direction or the OY direction when the first nozzle 110 moves from the first initial position to the target position is obtained, and a second displacement along the OX direction or the OY direction when the second nozzle 120 moves from the second initial position to the target position is obtained, where a difference between the first displacement and the second displacement is a relative distance between the first nozzle and the second nozzle. The measuring method of the double-nozzle 3D printer is free of manual operation, high in automation degree and free of dependence on a vision system such as a camera, so that the measuring cost is low, the measuring mode is simple, the operation difficulty is low, the measuring precision can be guaranteed, the problems that the existing measuring mode is limited by operation experience and the measuring error greatly affects the calibration precision are solved, and the distance between two nozzles is conveniently monitored by improving the measuring precision so as to accurately control the printing process.

Further, the application also provides a calibration method of the dual-nozzle 3D printer, which comprises the above measurement method and further comprises the following steps:

the first difference value and the second difference value are fed back to the control system and are used as distance compensation parameters of the first spray head 110 and the second spray head 120, the distance between the two spray heads is adjusted through the motion system, the distance between the first spray head and the second spray head is enabled to be within a preset range, and therefore printing quality and success rate are guaranteed.

The embodiment of the invention also provides a calibration device of the double-nozzle 3D printer, which comprises an acquisition unit, a calculation unit and a calibration unit. The acquiring unit is configured to acquire a first displacement of the first nozzle 110 along the X direction when the first nozzle moves from a first initial position to a first preset position; the acquiring unit is further capable of acquiring a second displacement of the second nozzle 120 in the X direction when the second nozzle moves from the second initial position to the first preset position, feeding back the calculated first displacement and second displacement to the calculating unit, calculating a difference between the first displacement and the second displacement by the calculating unit, and feeding back the difference to the calibrating unit. The calibration unit receives the difference and adjusts the distance between the first nozzle 110 and the second nozzle 120 according to the difference so as to calibrate the error between the first nozzle 110 and the second nozzle 120, ensure that the distance between the two nozzles is within a preset range, accurately control the printing process and further ensure the printing quality and the success rate.

In addition, an embodiment of the present invention further provides a computer-readable storage medium, which stores a calibration program of a dual-nozzle 3D printer, and when the calibration program of the dual-nozzle 3D printer is executed by a processor, the flow of the embodiments of the methods described above is implemented. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), memory bus (Rambus), direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. A measuring method of a double-nozzle 3D printer is characterized by comprising the following steps:

A first difference of the displacement S1 and the displacement S3 is calculated.

2. The measuring method of the dual head 3D printer according to claim 1, wherein the measuring method of the dual head 3D printer further comprises:

acquiring displacement S4 along the Y direction when the second spray head moves from the second initial position to the second preset position;

3. The measuring method of the dual head 3D printer according to claim 2, wherein the step of obtaining the displacement S1 in the X direction when the first head moves from the first initial position to the first preset position further comprises:

the first driving piece drives the first spray head to move to a position with the coordinate of (0, Y1) along the direction opposite to the X direction; the second driving piece drives the first spray head to move from the position with the coordinate (0, Y1) to the position with the coordinate (0, 0) along the direction opposite to the Y direction; or

A second driving piece drives the first spray head to move to a position with a coordinate (X1, 0) along the direction opposite to the Y direction; the first driving piece drives the first spray head to move from the position with the coordinate (X1, 0) to the position with the coordinate (0, 0) along the direction opposite to the X direction.

4. The method for measuring a dual head 3D printer according to claim 3, wherein the step of moving the first head from the first initial position to the first preset position is preceded by the further step of: and placing a positioning piece on the hot bed platform, wherein the first preset position is one end of the positioning piece along the X direction, and the second preset position is one end of the positioning piece along the Y direction.

5. The measuring method of the dual-nozzle 3D printer according to claim 4, wherein one of the positioning member and the nozzle group is connected with a negative voltage, the other is connected with a positive voltage, and when the positioning member is in contact with the nozzle group, the nozzle group stops moving.

6. The measuring method of the dual head 3D printer according to claim 4, wherein the step of moving the first head from the first initial position to the first preset position comprises:

s112, the first spray head moves a second distance from the first position to a second position along the Y direction;

7. The measurement method of the dual head 3D printer according to claim 6, wherein the step of moving the first head from the first initial position to a second preset position comprises;

the first spray head moves from the first initial position to a fifth position along the X direction by a distance S1; and the first spray head moves along the Y direction from the fifth position until the first spray head is contacted with the positioning piece.

8. A calibration method for a dual-nozzle 3D printer, comprising the measurement method according to any one of claims 2 to 7, further comprising the steps of:

and taking the first difference value as a distance compensation parameter of the first sprayer and the second sprayer and feeding back the distance compensation parameter to a control system, and calibrating the distance error of the first sprayer and the second sprayer through the control system.

9. The utility model provides a calibrating device of dual spray 3D printer which characterized in that includes:

A calculation unit configured to calculate difference information between the first displacement and the second displacement;

10. A computer-readable storage medium, on which a calibration program of a dual-nozzle 3D printer is stored, the calibration program of the dual-nozzle 3D printer, when executed by a processor, implementing the calibration method of the dual-nozzle 3D printer according to claim 8.