CN108656550B - Calibration method of double-nozzle 3D printer - Google Patents
Calibration method of double-nozzle 3D printer Download PDFInfo
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- CN108656550B CN108656550B CN201810436296.XA CN201810436296A CN108656550B CN 108656550 B CN108656550 B CN 108656550B CN 201810436296 A CN201810436296 A CN 201810436296A CN 108656550 B CN108656550 B CN 108656550B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
Abstract
The invention discloses a calibration method of a double-nozzle 3D printer, which comprises the following steps: 1) a zeroing operation, 2) left and right showerhead calibration, and 3) compensation interpolation. The invention reduces the requirements on the processing precision and the assembly precision of parts, reduces the manufacturing cost, ensures the switching precision of the double spray heads according to the interpolation function and the design requirement of a user, has more perfect design, can realize the precision adjustment function, has simple and convenient operation, greatly shortens the defects of long time spent in the aspect of double-nozzle adjustment, unreliable adjustment precision and the like.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a calibration method of a double-nozzle 3D printer.
Background
Independent dual spray nozzle X axle precision relies on increasing X axle nozzle seat precision and X axle installation positioning accuracy to guarantee that the dual spray nozzle switches the drawback of the excessive unsmooth surface of switching face that exists in printing among the prior art, and the part machining precision, the equipment required precision is very strict, and the cost is expensive, is not suitable for batch production, and timing time is long, and the timing effect is poor.
Disclosure of Invention
The invention aims to provide a technical scheme of a calibration method of a double-nozzle 3D printer aiming at the defects in the prior art, the scheme reduces the requirements on the part processing precision and the assembly precision, reduces the manufacturing cost, is simple and convenient to operate, and greatly shortens the defects of long time spent in the aspect of double-nozzle adjustment, unreliable adjustment precision and the like.
In order to solve the technical problems, the invention adopts the following technical scheme:
a calibration method of a double-nozzle 3D printer is characterized by comprising the following steps:
1) operation of returning to zero
After the machine is assembled, the left sprayer and the right sprayer are respectively moved to the left and right directions through the left motor and the right motor, so that the left sprayer is contacted with the left limiting block, the right sprayer is contacted with the right limiting block, then the motors stop moving, and the positions are the respective zero points of the left sprayer and the right sprayer;
2) left and right spray head calibration
a. Firstly, after the left spray head returns to zero, printing a certain straight line parallel to the Y axis at intervals of a set distance from left to right;
b. after the printing work of the left nozzle is finished, returning to the original point position of the left nozzle, moving the right nozzle to the position of the total stroke length of the X axis to print a first straight line parallel to the Y axis, judging the position coordinate of a second straight line printed by the right nozzle according to the position of the first straight line printed by the right nozzle and the position of the first straight line printed by the left nozzle, setting a numerical value of the reduction of the printing straight line of the right nozzle from the left nozzle every time when the second straight line printed by the right nozzle is smaller than the distance between the printing straight line position of the first straight line printed by the right nozzle and the printing straight line position of the left nozzle, and leading the printing straight line of the right nozzle to be infinitely close to the printing straight line of the left nozzle or to be completely superposed to calculate and determine the;
3) compensation interpolation
And after printing is finished, comparing the coincidence of the printing straight line of the left nozzle and the printing straight line of the right nozzle, selecting the straight line with good coincidence, calculating the error value of the total stroke of the X axis, compensating the calculated error value into a machine, and finishing the calibration compensation work of the X axis.
Further, after the left spray head returns to zero, a certain straight line parallel to the Y axis is printed at set intervals from left to right; the distance of the printed parallel straight lines is X-axis total stroke/X (X-axis total stroke error/printer defines X-axis direction accuracy); the printer defines the X-axis direction accuracy by printing the number of lines parallel to the Y-axis, X-axis total stroke error.
Further, a value of a decrease in the distance of the right nozzle printing straight line from the left nozzle printing straight line at each time is given as the printer definition X-axis direction accuracy.
Further, the judging mode of judging the position coordinates of the right nozzle printing second straight line according to the positions of the right nozzle printing first straight line and the left nozzle printing first straight line is as follows:
when a first straight line printed by a right nozzle is left of a first straight line printed by a left nozzle, a second straight line printed by the right nozzle is parallel to a Y-axis straight line, an X-axis coordinate X2 is equal to an X-axis total stroke (the distance between the left nozzle printing parallel straight lines is equal to the printer definition X-axis direction precision), then a right nozzle prints a third straight line parallel to the Y-axis, an X-axis coordinate X3 is equal to the X-axis total stroke (2 ×, the distance between every two printing straight lines is equal to 2 ×, the printer definition X-axis direction precision), then the right nozzle prints a fourth straight line parallel to the Y-axis, an X-axis coordinate X4 is equal to the X-axis total stroke (3 ×, the distance between every two printing straight lines is equal to 3 ×, the X-axis direction precision is defined by the printer definition), and so on the same way, the number of straight lines printed by the right nozzle parallel;
if the right nozzle prints a first straight line on the right side of the first straight line printed by the left nozzle, the right nozzle prints a second straight line parallel to the Y axis, the X-axis coordinate X2 is the total stroke of the X axis (the distance between every two printing straight lines and the X-axis direction precision defined by the printer), then the right nozzle prints a third straight line parallel to the Y axis, the X-axis coordinate X3 is the total stroke of the X axis (2 × is the distance between every two printing straight lines and 2 × defines the X-axis direction precision), then the right nozzle prints a fourth straight line parallel to the Y axis, the X-axis coordinate X4 is the total stroke of the X axis (3 × is the distance between every two printing straight lines and 3 × defines the X-axis direction precision), and so on the number of straight lines printed by the right nozzle and parallel to the Y axis is the same as the number of straight lines printed by the left nozzle.
Further, according to the coincidence of the printing straight line of the left spray head and the printing straight line of the right spray head, a straight line with good coincidence is selected to calculate the error value of the total X-axis stroke, and the comparison calculation mode is as follows:
if the left nozzle prints a first straight line parallel to the Y axis and the right nozzle prints a first left X-axis total stroke interpolation command parallel to the Y-axis, inputting (-printer definition X-axis direction precision (number of straight lines with the best contact ratio-1)) into the interpolation command, and then clicking to determine and finishing the interpolation work;
if the left nozzle prints a first straight line parallel to the Y axis and the right X axis total stroke interpolation command is input (+ the printer defines X axis direction precision (the number n-1 of the straight lines with the best coincidence degree)), then clicking is carried out to determine, and the interpolation work is finished.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention reduces the requirements on the processing precision and the assembly precision of parts, reduces the manufacturing cost, ensures the switching precision of the double spray heads according to the interpolation function and the design requirement of a user, has more perfect design, can realize the precision adjustment function, has simple and convenient operation, greatly shortens the defects of long time spent in the aspect of double-nozzle adjustment, unreliable adjustment precision and the like.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a schematic diagram of a printer in a calibration method of a dual-nozzle 3D printer according to the present invention.
In the figure: 1-a left limiting block; 2-a right limiting block; 3-left shower nozzle; 4-right nozzle.
Detailed Description
The invention discloses a calibration method of a double-nozzle 3D printer, wherein the printer is shown in figure 1 and comprises the following steps:
1) operation of returning to zero
After the machine is assembled, the left sprayer 3 and the right sprayer 4 are respectively moved to the left and right directions through the left motor and the right motor, so that the left sprayer 3 is contacted with the left limiting block 1, the right sprayer 4 is contacted with the right limiting block 2, then the motors stop moving, and the positions are the respective zero points of the left sprayer and the right sprayer;
2) left and right spray head calibration
a. Firstly, after the left spray head 3 returns to zero, printing a certain straight line parallel to the Y axis from left to right at set intervals;
b. after the printing work of the left nozzle 3 is finished, the left nozzle 3 returns to the original point position of the left nozzle 3, the right nozzle 4 moves to the position of the total stroke length of the X axis to print a first straight line parallel to the Y axis, the position coordinate of a second straight line printed by the right nozzle 4 is judged according to the position of the first straight line printed by the right nozzle 4 and the position of the first straight line printed by the left nozzle 3, the distance between the position of the second straight line printed by the right nozzle 4 and the position of the second straight line printed by the left nozzle 3 is smaller than the distance between the position of the first straight line printed by the right nozzle 4 and the position of the first straight line printed by the left nozzle 3, a numerical value which is reduced from the printing straight line of the right nozzle 4 to the printing straight line of the left nozzle 3 every time is given, and the printing straight line;
3) compensation interpolation
After printing is finished, the coincidence of the printing straight line of the left spray head 3 and the printing straight line of the right spray head 4 is compared, the straight line with good coincidence is selected to calculate the error value of the total stroke of the X axis, the calculated error value is compensated into a machine, and the X axis calibration compensation work is finished.
Further, after the left spray head 3 returns to zero, a certain straight line parallel to the Y axis is printed at set intervals from left to right; the distance of the printed parallel straight lines is X-axis total stroke/X (X-axis total stroke error/printer defines X-axis direction accuracy); the printer defines the X-axis direction accuracy by printing the number of lines parallel to the Y-axis, X-axis total stroke error.
Further, the X-axis direction accuracy is defined for the printer by giving an optimum value for each time the right head 4 prints a straight line that decreases from the left head 3 printing straight line.
Further, the judgment mode for judging the position coordinate of the second straight line printed by the right nozzle 4 according to the positions of the first straight line printed by the right nozzle 4 and the first straight line printed by the left nozzle 3 is as follows:
when a first straight line printed by the right nozzle 4 is left of a first straight line printed by the left nozzle 3, a second straight line printed by the right nozzle 4 is parallel to a Y-axis straight line, an X-axis coordinate X2 is equal to an X-axis total stroke (the distance between the parallel straight lines printed by the left nozzle 3 and the precision of the printer in the X-axis direction), then the right nozzle 4 prints a third straight line parallel to the Y-axis, an X-axis coordinate X3 is equal to an X-axis total stroke (2 ×, the distance between every two printing straight lines and the precision of the printer in the X-axis direction defined by the 2 ×), then the right nozzle 4 prints a fourth straight line parallel to the Y-axis, an X-axis coordinate X4 is equal to an X-axis total stroke (3 ×, the distance between every two printing straight lines and the precision of the printer in the X-axis direction defined by the 3 ×), and so on the same way, the number of straight lines printed by the right;
if the right nozzle 4 prints a first straight line on the right of the first straight line printed by the left nozzle 3, the right nozzle 4 prints a second straight line parallel to the Y axis, and the X-axis coordinate X2 is the X-axis total stroke- (distance between every two printing straight lines + precision of printer in X-axis direction), then the right nozzle 4 prints a third straight line parallel to the Y axis, and the X-axis coordinate X3 is the X-axis total stroke- (2 × distance between every two printing straight lines +2 × precision of printer in X-axis direction), then the right nozzle 4 prints a fourth straight line parallel to the Y axis, and the X-axis coordinate X4 is the X-axis total stroke- (3 × distance between every two printing straight lines +3 × precision of printer in X-axis direction), and so on the number of straight lines parallel to the Y axis printed by the right nozzle 4 is the same as the number of straight lines printed by the left nozzle 3.
Further, according to the coincidence of the printing straight line of the left spray head 3 and the printing straight line of the right spray head 4, the straight line with good coincidence is selected to calculate the error value of the total X-axis stroke, and the comparison calculation mode is as follows:
if the left nozzle 3 prints a first straight line parallel to the Y axis and the right nozzle 4 prints a first left X-axis total stroke interpolation command parallel to the Y axis, the command is input (-the printer defines the X-axis direction precision (the number of straight lines with the best contact ratio is-1)), then clicking is carried out for determination, and the interpolation work is finished;
if the left nozzle 3 prints a first straight line parallel to the Y axis and the right nozzle 4 prints a first straight line parallel to the Y axis and inputs the right X axis total stroke interpolation command (+ the printer defines X axis direction precision (the number n-1 of the straight lines with the best coincidence degree)), then clicking to determine and finishing the interpolation work. Where n refers to the unprinted second strip.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple variations, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are within the scope of the present invention.
Claims (5)
1. A calibration method of a double-nozzle 3D printer is characterized by comprising the following steps:
1) operation of returning to zero
After the machine is assembled, the left sprayer and the right sprayer are respectively moved to the left and right directions through the left motor and the right motor, so that the left sprayer is contacted with the left limiting block, the right sprayer is contacted with the right limiting block, then the motors stop moving, and the positions are the respective zero points of the left sprayer and the right sprayer;
2) left and right spray head calibration
a. Firstly, after the left spray head returns to zero, printing a certain straight line parallel to the Y axis at intervals of a set distance from left to right;
b. after the printing work of the left nozzle is finished, returning to the original point position of the left nozzle, moving the right nozzle to the position of the total stroke length of the X axis to print a first straight line parallel to the Y axis, judging the position coordinate of a second straight line printed by the right nozzle according to the position of the first straight line printed by the right nozzle and the position of the first straight line printed by the left nozzle, setting a numerical value of the reduction of the printing straight line of the right nozzle from the left nozzle every time when the second straight line printed by the right nozzle is smaller than the distance between the printing straight line position of the first straight line printed by the right nozzle and the printing straight line position of the left nozzle, and leading the printing straight line of the right nozzle to be infinitely close to the printing straight line of the left nozzle or to be completely superposed to calculate and determine the;
3) compensation interpolation
And after printing is finished, comparing the coincidence of the printing straight line of the left nozzle and the printing straight line of the right nozzle, selecting the straight line with good coincidence, calculating the error value of the total stroke of the X axis, compensating the calculated error value into a machine, and finishing the calibration compensation work of the X axis.
2. The calibration method of the dual-nozzle 3D printer according to claim 1, wherein: after the left spray head returns to zero, printing a certain straight line parallel to the Y axis at set intervals from left to right;
the distance of the printed parallel straight lines is X-axis total stroke/X (X-axis total stroke error/printer defines X-axis direction accuracy);
the printer defines the X-axis direction accuracy by printing the number of lines parallel to the Y-axis, X-axis total stroke error.
3. The calibration method of the dual-nozzle 3D printer according to claim 1, wherein: and giving a value of the reduction of the distance between the right spray head printing straight line and the left spray head printing straight line each time to define the X-axis direction precision of the printer.
4. The calibration method of the dual-nozzle 3D printer according to claim 1, wherein: the judgment mode for judging the position coordinates of the right nozzle printing second straight line according to the positions of the right nozzle printing first straight line and the left nozzle printing first straight line is as follows:
when a first straight line printed by a right nozzle is left of a first straight line printed by a left nozzle, a second straight line printed by the right nozzle is parallel to a Y-axis straight line, an X-axis coordinate X2 is equal to an X-axis total stroke (the distance between the left nozzle printing parallel straight lines is equal to the printer definition X-axis direction precision), then a right nozzle prints a third straight line parallel to the Y-axis, an X-axis coordinate X3 is equal to the X-axis total stroke (2 ×, the distance between every two printing straight lines is equal to 2 ×, the printer definition X-axis direction precision), then the right nozzle prints a fourth straight line parallel to the Y-axis, an X-axis coordinate X4 is equal to the X-axis total stroke (3 ×, the distance between every two printing straight lines is equal to 3 ×, the X-axis direction precision is defined by the printer definition), and so on the same way, the number of straight lines printed by the right nozzle parallel;
if the right nozzle prints a first straight line on the right side of the first straight line printed by the left nozzle, the right nozzle prints a second straight line parallel to the Y axis, the X-axis coordinate X2 is the total stroke of the X axis (the distance between every two printing straight lines and the X-axis direction precision defined by the printer), then the right nozzle prints a third straight line parallel to the Y axis, the X-axis coordinate X3 is the total stroke of the X axis (2 × is the distance between every two printing straight lines and 2 × defines the X-axis direction precision), then the right nozzle prints a fourth straight line parallel to the Y axis, the X-axis coordinate X4 is the total stroke of the X axis (3 × is the distance between every two printing straight lines and 3 × defines the X-axis direction precision), and so on the number of straight lines printed by the right nozzle and parallel to the Y axis is the same as the number of straight lines printed by the left nozzle.
5. The calibration method of the dual-nozzle 3D printer according to claim 1, wherein: according to the coincidence of the printing straight line of the left nozzle and the printing straight line of the right nozzle, the straight line with good coincidence is selected to calculate the error value of the total X-axis stroke, and the comparison calculation mode is as follows:
if the left nozzle prints a first straight line parallel to the Y axis and the right nozzle prints a first left X-axis total stroke interpolation command parallel to the Y-axis, inputting (-printer definition X-axis direction precision (number of straight lines with the best contact ratio-1)) into the interpolation command, and then clicking to determine and finishing the interpolation work;
if the left nozzle prints a first straight line parallel to the Y axis and the right X axis total stroke interpolation command is input (+ the printer defines X axis direction precision (the number n-1 of the straight lines with the best coincidence degree)), then clicking is carried out to determine, and the interpolation work is finished.
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| CN111267340B (en) * | 2020-02-28 | 2020-10-27 | 上海复志信息技术有限公司 | Nozzle calibration method and system of double-nozzle 3D printer |
| CN111688201A (en) * | 2020-06-19 | 2020-09-22 | 上海远铸智能技术有限公司 | Automatic calibration method and device for nozzle position of 3D printer |
| CN114536752A (en) * | 2022-03-10 | 2022-05-27 | 深圳快造科技有限公司 | 3D printer and method for calibrating 3D printer by four points |
| CN114536753B (en) * | 2022-03-10 | 2023-06-13 | 深圳快造科技有限公司 | 3D printer with square calibration target and method for calibrating 3D printer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030151167A1 (en) * | 2002-01-03 | 2003-08-14 | Kritchman Eliahu M. | Device, system and method for accurate printing of three dimensional objects |
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| CN105437543A (en) * | 2014-09-03 | 2016-03-30 | 三纬国际立体列印科技股份有限公司 | Three-dimensional printing device and coordinate deviation compensation method of spray head thereof |
| CN104786505A (en) * | 2015-05-07 | 2015-07-22 | 杭州捷诺飞生物科技有限公司 | Spray head position calibration device, spray head position calibration system of 3D printing equipment and 3D printing equipment |
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Denomination of invention: A calibration method of double nozzle 3D printer Effective date of registration: 20220721 Granted publication date: 20200710 Pledgee: China Co. truction Bank Corp Jinhua branch Pledgor: ZHEJIANG FLASHFORGE 3D TECHNOLOGY Co.,Ltd. Registration number: Y2022330001484 |
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Address after: 321016 standard workshop b-f3, 518 Xianyuan Road, Wucheng District, Jinhua City, Zhejiang Province Patentee after: Zhejiang Shanzhu Group Co.,Ltd. Address before: 321016 standard workshop b-f3, 518 Xianyuan Road, Wucheng District, Jinhua City, Zhejiang Province Patentee before: ZHEJIANG FLASHFORGE 3D TECHNOLOGY Co.,Ltd. |