CN103895229B - 3D print track control method, device and 3D print system - Google Patents
3D print track control method, device and 3D print system Download PDFInfo
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- CN103895229B CN103895229B CN201410127000.8A CN201410127000A CN103895229B CN 103895229 B CN103895229 B CN 103895229B CN 201410127000 A CN201410127000 A CN 201410127000A CN 103895229 B CN103895229 B CN 103895229B
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Abstract
The invention provides a kind of 3D print track control method, device and 3D print system. 3D print track control method, comprising: the threedimensional model that obtains model to be printed; Calculate the slope of the outer surface profile of threedimensional model; Set the first rising increment along slope direction; Determine the second rising increment at vertical direction according to the first rising increment; According to the movement locus of the second rising increment control algorithm printhead, thereby print. The present invention is in the bottom and the different places of slope such as top of this model, increment in slope direction is for fixed, thereby make the track of the tip position planning that bottom position that slope is larger and slope are less have significant difference, denser at the less top print track of slope, thus do not need to support just printable these specific positions.
Description
Technical field
The present invention relates to 3D and print field, particularly a kind of 3D print track control method, device and 3DPrint system.
Background technology
Common 3D Method of printing adopts the successively process of stack, the printing rail that this method calculatesThe feature of trace curve is to be definite value with the height value of layer, and while successively calculating, upwards the numerical value of stack is alsoDefinite value. Make to run in this way model silhouette slope hour, must take to increase the way of supporting construction,Increase backing material and will certainly increase material and time-write interval, a part of backing material to model surface quality alsoCan exert an influence.
Fig. 1 shows the print track control method in the time that 3D prints in prior art. As shown in Figure 1, makeWhile printing round sealed curved surface with the Method of printing of prior art, cut apart identical value Δ Z, printer model 1 for every layerWill be divided into countless contour curved surfaces 2. Like this, in the less position of the top of circular printer model 1 slopePut, the horizontal spacing between the close layer 3 of cutting apart according to Δ Z is respectively x1, x2, x3, and horizontal spacingIncrease rapidly along with reducing of slope. In the time that the value of horizontal spacing is greater than the diameter of printed material, layer and layerBetween just can not bond together, cause and print unsuccessfully; Or supporting construction 4 is taked in below herein, and this justCause the waste of printed material and time-write interval.
The FDM(melt extruded sedimentation type of present stage) 3D printing technique exists that print speed is slow, complex modelThe problems such as supporting construction is many, inefficiency, curved surface printing precision that some slope variation is large is poor even can not beatBe printed as merit, variety of problems is restricting popularization and the development of 3D printing technique.
Summary of the invention
The invention provides a kind of 3D print track control method, device and 3D print system, existing to solveThe problems such as in technology, print speed is slow, complex model supporting construction is many, inefficiency.
As a first aspect of the present invention, a kind of 3D print track control method is provided, comprising: obtainThe threedimensional model of model to be printed; Calculate the slope of the outer surface profile of threedimensional model; Set along slope directionThe first rising increment; Determine the second rising increment at vertical direction according to the first rising increment; According toThe movement locus of two rising increment control algorithm printheads, thus print.
Further, also comprise: calculate the difference in height between same layer movement locus; Whether decision height is poor largeIn the first predetermined value; In the time that difference in height is greater than the first predetermined value, by entering silk adjustment strategy, movement locus is enteredRow is revised, so that difference in height is limited in predetermined scope.
Further, entering silk adjustment strategy comprises: adjust in proportion into silk amount according to difference in height.
Further, in the time that difference in height is less than the first predetermined value, continue according to the second rising increment control algorithm printheadMovement locus.
As a second aspect of the present invention, a kind of 3D print track control device is provided, comprising: model obtainsDelivery piece, for obtaining the threedimensional model of model to be printed; Slope computing module, for calculating threedimensional modelThe slope of outer surface profile; Slope delta setting module, rises and increases for setting along first of slope directionAmount; Vertically increment determination module, rises and increases for determining according to the first rising increment at second of vertical directionAmount; The first control module, for according to the movement locus of the second rising increment control algorithm printhead, thereby carries outPrint.
Further, also comprise: difference in height computing module, for calculating the height between same layer movement locusPoor; Judge module, for poor first predetermined value that whether is greater than of decision height; The second control module, forWhen difference in height is greater than the first predetermined value, by entering silk adjustment strategy, movement locus is revised, so that heightPoor being limited in predetermined scope.
Further, also comprise: enter silk amount computing module, for adjusting in proportion according to difference in height into silk amount,Thereby obtain adjusting strategy into silk.
Further, also comprise: the second printing control model, in the time that difference in height is less than the first predetermined value,Continue according to the movement locus of the second rising increment control algorithm printhead.
As a third aspect of the present invention, a kind of 3D print system is provided, it is characterized in that, comprise above-mentioned3D print track control device.
The present invention is in the bottom and the different places of slope such as top of this model, and the increment in slope direction isFixed, thus make the track of bottom position that slope is larger and the less tip position planning of slope have significant difference,Denser at the less top print track of slope, thus do not need to support just printable these special bitPut.
Brief description of the drawings
Fig. 1 is existing method print track schematic diagram;
Fig. 2 is print track schematic diagram of the present invention;
Fig. 3 is the print track schematic diagram of the present invention produce difference in height between same layer time;
Fig. 4 is the control flow chart of 3D print track control method of the present invention;
Fig. 5 is the structural representation of the 3D print track control device in the present invention.
Detailed description of the invention
The invention discloses a kind of 3D Method of printing based on outline slope. The method is mainly by outside judgementProfile slope, calculates every layer and prints the height value that needs rising, and every layer of geometric locus that printing is required,Every layer of track can be in sustained height plane. The inventive method can be printed multiple in the situation that not supportingAssorted curved surface, can make up the defects such as in present stage print procedure, supporting construction is many, print speed is slow, efficiency is low,Promote 3D and be printed on the more application of wide spectrum. Especially, the present invention is applicable to there is no the feelings of supporting constructionUnder condition, print less individual layer or the thin film model structure of slope, increased the scope of application of 3D printing technique,Improve 3D printing effect.
As a first aspect of the present invention, please refer to Fig. 1 to Fig. 4, the control of a kind of 3D print track is providedMethod, comprising:
Model obtaining step, obtains the threedimensional model 1 of model to be printed; Especially, obtaining and can be hereObtaining from outside, can be also to build voluntarily described threedimensional model 1.
Slope calculation procedure, the slope of the outer surface profile of calculating threedimensional model 1.
Slope delta is set step, sets the first rising increment Delta Z1 along slope direction. Especially, hereThe first rising increment Delta Z1 can refer to along the increment of the arc length of outer surface. Wherein, Δ Z1 can be according to printingThe diameter of the speed in journey and use material is determined.
Vertically increment determining step, determines the second rising increment at vertical direction according to the first rising increment Delta Z1H. Like this, although be at a high speed certain value (the with the rising of layer print track in the slope direction of outlineOne rising increment Delta Z1), but numerical value on vertical height is not identical.
With the first control step, control the movement locus of printhead according to the second rising increment h, thereby beatPrint.
With reference to figure 2, technique scheme is carried out to exemplary illustration below.
In the embodiment shown in Fig. 2, threedimensional model 1 is a kind of model of outline rule, for example, and this mouldThe outline of type has centrosymmetric structure or similar centrosymmetric structure, as the common shape such as ball, cylinderShape.
After the slope of the outline of the method by the present invention to this model calculates, can set along obliqueThe first rising increment Delta Z1 of rate direction. In the bottom and the different places of slope such as top of this model, tiltedlyThe definite value rising in rate direction is all Δ Z1, thereby makes bottom position and the less top of slope that slope is largerThe track of position planning has significant difference, denser, such at the less top print track of slopeBenefit is not need to support just printable these specific positions. By contrast, if used shown in Fig. 1Method of printing of the prior art, just there will be disconnection between layers at the top of this model, can onlyAdopt and support or can not print.
Because the outline slope of threedimensional model differs larger, can cause with the height value of layer and differ larger. For this reason,Preferably, also comprise: calculate the difference in height between same layer movement locus; Whether decision height is poor is greater thanOne predetermined value; In the time that difference in height is greater than the first predetermined value, by entering silk adjustment strategy, movement locus is repaiiedJust, so that difference in height be limited in predetermined scope. For example, entering silk adjusts a strategy and can adopt and reduce into silkAmount or stop into the strategy etc. of silk, the contour surface low with holding altitude rises. Preferably, enter silk and adjust planSlightly comprise: adjust in proportion into silk amount according to difference in height.
Preferably, in the time that difference in height is less than the first predetermined value, continue according to the second rising increment control algorithm printheadMovement locus.
In the embodiment shown in fig. 3, threedimensional model is not the model of outline rule. As shown in Figure 3, sameOn one height, the slope of outline differs larger, and n layer and n+1 layer slope have certain difference. So, according to thisThe print track that the method based on profile slope shown in patent Fig. 2 calculates just as shown in Figure 3 thatSample, same layer track be not on sustained height.
As shown in Figure 3, in this case, the slope of outline can be along with the increase of the number of plies, the height of same layerDegree missionary society constantly accumulates. For example, when to k layer and k+1 layer, although slope is more or less the same, same layerDifference in height has been greater than certain certain value (i.e. the first predetermined value), need in print track, increase into silk and adjust planSlightly.
For example, this enters silk adjusts a strategy and can be, in the time that printhead runs to the larger position of same layer height value,Calculate according to a certain percentage and reduce into silk amount or do not enter silk. Will adjust like this and print when the later stage, same layer was printedCause the poor excessive problem of same layer height, ensure the integrality of last printer model.
As a second aspect of the present invention, please refer to Fig. 5, a kind of 3D print track control device is provided,It is for realizing above-mentioned 3D print track control method. For example, this 3D print track control device canRealize in the mode by hardware, for example single-chip microcomputer, FPGA, flush bonding processor, digital circuit, simulationCircuit, Digital Analog Hybrid Circuits, computer, PLC etc. Beating with above-mentioned 3D of 3D print track control devicePrint method for controlling trajectory identical or similar in principle, therefore, identical content is no longer narrated at this, pleaseWith reference to the description in 3D print track control method.
This 3D print track control device comprises: model acquisition module, and for obtaining the three-dimensional of model to be printedModel; Slope computing module, for calculating the slope of outer surface profile of threedimensional model; Slope delta is setModule, for setting the first rising increment along slope direction; Vertically increment determination module, for according to theOne rising increment is determined the second rising increment at vertical direction; The first control module, for according to secondRise the movement locus of increment control algorithm printhead, thereby print.
Preferably, also comprise: difference in height computing module, for calculating the difference in height between same layer movement locus;Judge module, for poor first predetermined value that whether is greater than of decision height; The second control module, for heightWhen difference is greater than the first predetermined value, by entering silk adjustment strategy, movement locus is revised, so that difference in height limitFix in predetermined scope.
Preferably, also comprise: enter silk amount computing module, for adjusting in proportion according to difference in height into silk amount, fromAnd obtain adjusting strategy into silk.
Preferably, also comprise: the second printing control model, in the time that difference in height is less than the first predetermined value, continuesContinuous according to the movement locus of the second rising increment control algorithm printhead.
As a third aspect of the present invention, a kind of 3D print system is provided, comprise that above-mentioned 3D prints railMark control device.
The present invention is mainly for the FDM form 3D printing technique that uses the engineering plastics such as ABS, and emphasis existsModel trajectory planning technology in print procedure. The present invention is optimized calculating to the movement locus of printhead,Can implementation model fast, efficiently print.
The present invention carries for solving the problems such as in prior art, in 3D print procedure, printing effect is low, supporting condition is manySupplied a kind of effective method, as long as the track of printer model is optimized to computing, 3D printsCan complete the printing speed of different models. For saving material, disregarding in the situation of rigidity this kind of printing sideMethod is more suitable for individual layer or thin layer is printed, and has improved greatly print speed and efficiency.
Claims (7)
1. a 3D print track control method, is characterized in that, comprising:
Obtain the threedimensional model of model to be printed;
Calculate the slope of the outer surface profile of described threedimensional model;
Set the first rising increment along described slope direction;
Determine the second rising increment at vertical direction according to described the first rising increment;
According to the movement locus of described the second rising increment control algorithm printhead, thereby print;
Difference in height described in calculating same layer between movement locus;
Judge whether described difference in height is greater than the first predetermined value;
In the time that described difference in height is greater than described the first predetermined value, by entering silk adjustment strategy, described movement locus is revised, so that described difference in height is limited in predetermined scope.
2. 3D print track control method according to claim 1, is characterized in that, described in enter silk and adjust a strategy and comprise: adjust in proportion into silk amount according to described difference in height.
3. 3D print track control method according to claim 1, is characterized in that, in the time that described difference in height is less than described the first predetermined value, continues according to the movement locus of printhead described in described the second rising increment control algorithm.
4. a 3D print track control device, is characterized in that, comprising:
Model acquisition module, for obtaining the threedimensional model of model to be printed;
Slope computing module, for calculating the slope of outer surface profile of described threedimensional model;
Slope delta setting module, for setting the first rising increment along described slope direction;
Vertically increment determination module, for determining the second rising increment at vertical direction according to described the first rising increment;
The first control module, for according to the movement locus of described the second rising increment control algorithm printhead, thereby prints;
Difference in height computing module, for calculating the difference in height between movement locus described in same layer;
Judge module, for judging whether described difference in height is greater than the first predetermined value;
The second control module, in the time that described difference in height is greater than described the first predetermined value, revises described movement locus by entering silk adjustment strategy, so that described difference in height is limited in predetermined scope.
5. 3D print track control device according to claim 4, is characterized in that, also comprises:
Enter silk amount computing module, for adjusting in proportion according to described difference in height into silk amount, adjust strategy thereby enter silk described in obtaining.
6. 3D print track control device according to claim 4, is characterized in that, also comprises:
The second printing control model, in the time that described difference in height is less than described the first predetermined value, continues according to the movement locus of printhead described in described the second rising increment control algorithm.
7. a 3D print system, is characterized in that, comprises the 3D print track control device described in any one in claim 4 to 6.
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| CN201410127000.8A CN103895229B (en) | 2014-03-31 | 2014-03-31 | 3D print track control method, device and 3D print system |
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| CN103895229B true CN103895229B (en) | 2016-05-11 |
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| CN104890238B (en) * | 2015-04-30 | 2017-05-24 | 北京敏速自动控制设备有限公司 | Three-dimensional printing method and system thereof |
| TWI704995B (en) * | 2019-07-23 | 2020-09-21 | 三緯國際立體列印科技股份有限公司 | Slicing method for horizontal facets of color 3d object |
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| CN103660300A (en) * | 2013-12-04 | 2014-03-26 | 北京太尔时代科技有限公司 | Automatic-leveling 3D printer and printing method thereof |
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| JPH05278123A (en) * | 1992-04-01 | 1993-10-26 | Matsushita Electric Ind Co Ltd | Laser scanning method for optical model |
| JP2005047096A (en) * | 2003-07-31 | 2005-02-24 | Mitsubishi Motors Corp | Optical shaping apparatus |
| WO2013167685A1 (en) * | 2012-05-11 | 2013-11-14 | Luxexcel Holding B.V. | Method for printing a three-dimensional structure, method for controlling a print head and printed article |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103660300A (en) * | 2013-12-04 | 2014-03-26 | 北京太尔时代科技有限公司 | Automatic-leveling 3D printer and printing method thereof |
Non-Patent Citations (2)
| Title |
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| 快速原型技术中的自适应分层;周岩等;《昆明理工大学学报》;20010831;第26卷(第4期);第1-3页及图2,6 * |
| 快速成形技术的研究热点及其展望;庾在海等;《仪器仪表用户》;20071231;第14卷(第2期);第2.1节 * |
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