CN108656550A - A kind of calibration method of double nozzle 3D printers - Google Patents

Abstract

The invention discloses a kind of calibration method of double nozzle 3D printers, step includes：1) back to zero operation, 2) calibration of left and right nozzle and 3) compensation interpolation.Present invention reduces the requirements to part processing precision and assembly precision, reduce manufacturing cost, and user can determine that double nozzles switch precision according to interpolation function according to itself design requirement, design is more perfect, and it can realize precision adjustment function, it is easy to operate, it is convenient, the defects of the spent time is long in terms of substantially reducing twin-jet nozzle adjustment, and adjusting accuracy is unreliable.

Description

A kind of calibration method of double nozzle 3D printers

Technical field

The invention belongs to 3D printing technique field more particularly to a kind of calibration methods of double nozzle 3D printers.

Background technology

Independent double nozzle X-axis precision are protected by X-axis nozzle boss precision and X-axis installation positioning accuracy is increased in the prior artDemonstrate,prove the rough drawback of diverter surface excessive surface present in twin-jet nozzle switching printing, part processing precision, assembly precision requirementIt is very strict, it is expensive, it is not suitable for producing in batches, and the adjustment time is long, adjustment effect is poor.

Invention content

Present invention aims at a kind of calibration of double nozzle 3D printers is provided for deficiency of the prior artThe technical solution of method, this scheme reduces the requirements to part processing precision and assembly precision, reduce manufacturing cost, operation letterFolk prescription just, substantially reduces the defects of twin-jet nozzle adjustment aspect the spent time is long, and adjusting accuracy is unreliable.

In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：

A kind of calibration method of double nozzle 3D printers, it is characterised in that include the following steps：

1) back to zero operates

Machine is respectively transported left nozzle and right nozzle to respective left and right directions by left motor and right motor after being completedIt is dynamic, so that left nozzle is touched with left limit block, right nozzle is touched with right limit block, then motor stop motion, is a left side with this positionThe right respective zero of nozzle；

2) left and right nozzle is calibrated

A, it prints certain item from left to right every setpoint distance after nozzle back to zero left first and is parallel to Y-axis straight line；

B, after the completion of left nozzle printing work, left nozzle origin position is returned to, right nozzle moves to X-axis total stroke length positionPrinting first and Y-axis parallel lines are set, according to the position of right nozzle printing straight line and left nozzle printing straight lineSet the right nozzle printing Article 2 linear position coordinate of judgement, the of the Article 2 linear position of right nozzle printing and left nozzle printingThe distance between two articles of linear positions are less than first article of linear position of right nozzle printing and left nozzle printing straight line positionThe distance between set, the numerical value that the left nozzle printing straight line of right nozzle printing air line distance reduces every time is given, right nozzle is madePrinting straight line infinitely close to left nozzle printing straight line or is completely superposed the determining X-axis total kilometres error amount of calculating；

3) interpolation is compensated

The repeatability that left nozzle printing straight line and right nozzle printing straight line are compared after the completion of to be printed, it is good to select repeatabilityStraight line calculates X-axis total kilometres error amount, by the error amount compensation to machine of calculating, completes the work of X-axis compensation for calibrating errors.

Further, certain item is printed every setpoint distance be parallel to Y-axis straight line from left to right after left nozzle back to zero；Printing is flatRow straight line standoff distance=X-axis total kilometres ÷ (X-axis total kilometres error ÷ printer definition X-directions precision)；Printing is parallel to YAxis vertical element number=X-axis total kilometres error ÷ printer definition X-direction precision.

Further, it is printer to give the numerical value that the left nozzle printing straight line of right nozzle printing air line distance reduces every timeX-direction precision.

Further, according to the right nozzle of location determination of right nozzle printing straight line and left nozzle printing straight linePrinting the decision procedure of Article 2 linear position coordinate is：

When the left of straight line of the straight line in left nozzle printing of right nozzle printing；The of right nozzle printingTwo straight lines for being parallel to Y-axis, (left nozzle printing parallel lines standoff distance-printer is fixed for X axis coordinate X2=X axis total kilometres-Adopted X-direction precision)；Then right nozzle printing Article 3 is parallel to the straight line of Y-axis, X axis coordinate X3=X axis total kilometres-(2 ×Every printing straight line standoff distance -2 × printer definition X-direction precision)；Then right nozzle printing Article 4 is parallel to Y-axisStraight line, X axis coordinate X4=X axis total kilometres-(3 × every printing straight line -3 × printer definition of standoff distance X-direction essenceDegree)；And so on, the vertical element number that right nozzle printing is parallel to Y-axis is identical as left nozzle printing vertical element number；

If right nozzle printing straight line, on the right of left nozzle printing straight line, the Article 2 of right nozzle printing is flatRow is in the straight line of Y-axis, X axis coordinate X2=X axis total kilometres-(every printing straight line standoff distance+printer definition X-direction essenceDegree)；Then right nozzle printing Article 3 is parallel to the straight line of Y-axis, X axis coordinate X3=X axis total kilometres-(2 × every printing straight lineStandoff distance+2 × printer definition X-direction precision)；Then right nozzle printing Article 4 is parallel to the straight line of Y-axis, and X-axis is satMark X4=X axis total kilometres-(3 × every printing straight line standoff distance+3 × printer definition X-direction precision)；And so on it is rightThe vertical element number that nozzle printing is parallel to Y-axis is identical as left nozzle printing vertical element number.

Further, according to the repeatability for comparing left nozzle printing straight line and right nozzle printing straight line, it is good to select repeatabilityStraight line calculates X-axis total kilometres error amount, and contrast conting mode is：

If first straight line for being parallel to Y-axis of left nozzle printing is on first left side for being parallel to Y-axis straight line of right nozzle printing(- printer definition X-direction precision * (the best vertical element number -1 of registration)) is inputted in square X-axis total kilometres order interpolation, soIt clicks and determines afterwards, interpolation work is completed；

If first straight line for being parallel to Y-axis of left nozzle printing is on first right side for being parallel to Y-axis straight line of right nozzle printing(+printer definition X-direction precision * (the best vertical element number n-1 of registration)) is inputted in square X-axis total kilometres order interpolation,Then it clicks and determines, interpolation work is completed.

The present invention is by adopting the above-described technical solution, have the advantages that：

Present invention reduces the requirements to part processing precision and assembly precision, reduce manufacturing cost, and user can rootDetermine that double nozzles switch precision according to itself design requirement according to interpolation function, design is more perfect, and can realize that precision adjustsFunction, it is easy to operate, it is convenient, substantially reduce the defects of twin-jet nozzle adjustment aspect the spent time is long, and adjusting accuracy is unreliable.

Description of the drawings

The invention will be further described below in conjunction with the accompanying drawings：

Fig. 1 is the schematic diagram of printer in a kind of calibration method of double nozzle 3D printers of the present invention.

In figure：1- left limit blocks；2- right limit blocks；The left nozzles of 3-；The right nozzles of 4-.

Specific implementation mode

A kind of calibration method of double nozzle 3D printers of the present invention, printer is as shown in Figure 1, include the following steps：

1) back to zero operates

Machine be completed after by left motor and right motor respectively by left nozzle 3 and right nozzle 4 to respective left and right directionsMovement makes left nozzle 3 be touched with left limit block 1, and right nozzle 4 is touched with right limit block 2, then motor stop motion, with this positionIt is set to the respective zero of left and right nozzle；

2) left and right nozzle is calibrated

A, it prints certain item from left to right every setpoint distance after 3 back to zero of nozzle left first and is parallel to Y-axis straight line；

B, after the completion of 3 print job of left nozzle, 3 origin position of left nozzle is returned to, it is long that right nozzle 4 moves to X-axis total kilometresPosition printing first and Y-axis parallel lines are spent, print straight line according to right nozzle 4 prints first article directly with left nozzle 3The right nozzle 4 of location determination of line prints Article 2 linear position coordinate, the Article 2 linear position that right nozzle 4 prints and left nozzleThe distance between the Article 2 linear positions of 3 printings are less than right nozzle 4 and print first article of linear position and the printing of left nozzle 3 theThe distance between straight line position gives each right nozzle 4 and prints the number that the left nozzle 3 of air line distance prints straight line reductionValue makes right nozzle 4 print the infinitely close printing straight line of left nozzle 3 of straight line or be completely superposed calculating and determines X-axis total kilometres error amount；

3) interpolation is compensated

Left nozzle 3 is compared after the completion of to be printed and prints the repeatability that straight line prints straight line with right nozzle 4, and it is good to select repeatabilityStraight line calculate X-axis total kilometres error amount, by the compensation to machine of the error amount of calculating, complete the work of X-axis compensation for calibrating errors.

Further, certain item is printed every setpoint distance be parallel to Y-axis straight line from left to right after 3 back to zero of left nozzle；PrintingParallel lines standoff distance=X-axis total kilometres ÷ (X-axis total kilometres error ÷ printer definition X-directions precision)；It prints parallelIn Y-axis vertical element number=X-axis total kilometres error ÷ printer definition X-direction precision.

Further, the numerical value that the given one left nozzle 3 of each printing of right nozzle 4 air line distance prints straight line reduction is optimal to bePrinter X-direction precision.

Further, the right spray of location determination of straight line and the printing straight line of left nozzle 3 is printed according to right nozzle 4It is first 4 printing Article 2 linear position coordinate decision procedure be：

When the left for the straight line that the straight line that right nozzle 4 prints is printed in left nozzle 3；Right nozzle 4 printsArticle 2 be parallel to the straight line of Y-axis, X axis coordinate X2=X axis total kilometres-(left nozzle 3 prints parallel lines standoff distance-are beatenPrint machine defines X-direction precision)；Then right nozzle 4 prints the straight line that Article 3 is parallel to Y-axis, X axis coordinate X3=X axis head officeJourney-(2 × every printing straight line standoff distance -2 × printer definition X-direction precision)；Then it is flat to print Article 4 for right nozzle 4Row is in the straight line of Y-axis, X axis coordinate X4=X axis total kilometres-(3 × every printing straight line standoff distance -3 × printer definition X-axisDirectional precision)；And so on, right nozzle 4 prints that be parallel to the vertical element number of Y-axis identical as the printing vertical element number of left nozzle 3；

If right nozzle 4 prints straight line and is printed on the right of straight line in left nozzle 3, the second of the printing of right nozzle 4Item is parallel to the straight line of Y-axis, X axis coordinate X2=X axis total kilometres-(every printing straight line standoff distance+printer definition X-axis sideTo precision)；Then right nozzle 4 prints the straight line that Article 3 is parallel to Y-axis, and (2 × every is beaten X axis coordinate X3=X axis total kilometres-Print straight line standoff distance+2 × printer definition X-direction precision)；Then right nozzle 4 prints Article 4 and is parallel to the straight of Y-axisLine, X axis coordinate X4=X axis total kilometres-(3 × every printing straight line standoff distance+3 × printer definition X-direction precision)；WithThis analogizes right nozzle 4 and prints that be parallel to the vertical element number of Y-axis identical as the printing vertical element number of left nozzle 3.

Further, according to the repeatability that left nozzle 3 prints straight line and right nozzle 4 prints straight line is compared, it is good to select repeatabilityStraight line calculate X-axis total kilometres error amount, contrast conting mode is：

If left nozzle 3 prints first straight line for being parallel to Y-axis and is parallel to Y-axis straight line for first in the printing of right nozzle 4(- printer definition X-direction precision * (the best vertical element number -1 of registration)) is inputted in the X-axis total kilometres order interpolation of left,Then it clicks and determines, interpolation work is completed；

If left nozzle 3 prints first straight line for being parallel to Y-axis and is parallel to Y-axis straight line for first in the printing of right nozzle 4(+printer definition X-direction precision * (the best vertical element number n- of registration are inputted in the X-axis total kilometres order interpolation of right1) it), then clicks and determines, interpolation work is completed.

It these are only specific embodiments of the present invention, but the technical characteristic of the present invention is not limited thereto.It is any with this hairBased on bright, for the technique effect for realizing essentially identical, made ground simple change, equivalent replacement or modification etc. are all coveredAmong protection scope of the present invention.

Claims (5)

1. a kind of calibration method of double nozzle 3D printers, it is characterised in that include the following steps：

1) back to zero operates

Machine is respectively moved left nozzle and right nozzle to respective left and right directions by left motor and right motor after being completed, and is madeLeft nozzle is touched with left limit block, and right nozzle is touched with right limit block, then motor stop motion, using this position as left and right nozzleRespective zero；

2) left and right nozzle is calibrated

A, it prints certain item from left to right every setpoint distance after nozzle back to zero left first and is parallel to Y-axis straight line；

B, after the completion of left nozzle printing work, left nozzle origin position is returned to, right nozzle moves to X-axis total stroke length position and beatsPrint first and Y-axis parallel lines, sentence according to the position of right nozzle printing straight line and left nozzle printing straight lineFixed right nozzle printing Article 2 linear position coordinate, the Article 2 of the Article 2 linear position and left nozzle printing of right nozzle printingThe distance between linear position be less than first linear position of right nozzle printing and first linear position of left nozzle printing itBetween distance, give the numerical value that the left nozzle printing straight line of right nozzle printing air line distance reduces every time, make right nozzle printingStraight line infinitely close to left nozzle printing straight line or is completely superposed the determining X-axis total kilometres error amount of calculating；

3) interpolation is compensated

The repeatability that left nozzle printing straight line and right nozzle printing straight line are compared after the completion of to be printed, selects the good straight line of repeatabilityX-axis total kilometres error amount is calculated, by the error amount compensation to machine of calculating, completes the work of X-axis compensation for calibrating errors.

2. a kind of calibration method of double nozzle 3D printers according to claim 1, it is characterised in that：The left nozzle returnsCertain item is printed every setpoint distance be parallel to Y-axis straight line from left to right after zero；

Print parallel lines standoff distance=X-axis total kilometres ÷ (X-axis total kilometres error ÷ printer definition X-directions precision)；

Printing is parallel to Y-axis vertical element number=X-axis total kilometres error ÷ printer definition X-direction precision.

3. a kind of calibration method of double nozzle 3D printers according to claim 1, it is characterised in that：It is described one givenThe numerical value that the left nozzle printing straight line of right nozzle printing air line distance reduces every time is printer X-direction precision.

4. a kind of calibration method of double nozzle 3D printers according to claim 1, it is characterised in that：It is beaten according to right nozzlePrint sentencing for straight line and the right nozzle printing Article 2 linear position coordinate of location determination of left nozzle printing straight lineDetermining mode is：

When the left of straight line of the straight line in left nozzle printing of right nozzle printing；The Article 2 of right nozzle printingIt is parallel to the straight line of Y-axis, X axis coordinate X2=X axis total kilometres-(left nozzle printing parallel lines standoff distance-printer definition XAxis direction precision)；Then right nozzle printing Article 3 is parallel to the straight line of Y-axis, X axis coordinate X3=X axis total kilometres-(2 × everyPrint straight line standoff distance -2 × printer definition X-direction precision)；Then right nozzle printing Article 4 is parallel to the straight of Y-axisLine, X axis coordinate X4=X axis total kilometres-(3 × every printing straight line standoff distance -3 × printer definition X-direction precision)；WithThis analogizes, and the vertical element number that right nozzle printing is parallel to Y-axis is identical as left nozzle printing vertical element number；

If right nozzle printing straight line, on the right of left nozzle printing straight line, the Article 2 of right nozzle printing is parallel toThe straight line of Y-axis, X axis coordinate X2=X axis total kilometres-(every printing straight line standoff distance+printer definition X-direction precision)；Then right nozzle printing Article 3 is parallel to the straight line of Y-axis, and (2 × every printing straight line is separated by X axis coordinate X3=X axis total kilometres-Distance+2 × printer definition X-direction precision)；Then right nozzle printing Article 4 is parallel to the straight line of Y-axis, X axis coordinate X4=X-axis total kilometres-(3 × every printing straight line standoff distance+3 × printer definition X-direction precision)；And so on right nozzleThe vertical element number that printing is parallel to Y-axis is identical as left nozzle printing vertical element number.

5. a kind of calibration method of double nozzle 3D printers according to claim 1, it is characterised in that：According to the left spray of comparisonThe repeatability of head printing straight line and right nozzle printing straight line selects the good straight line of repeatability and calculates X-axis total kilometres error amount, comparesCalculation is：

If first straight line for being parallel to Y-axis of left nozzle printing is in first left X-axis for being parallel to Y-axis straight line of right nozzle printing(- printer definition X-direction precision * (the best vertical element number -1 of registration)) is inputted in total kilometres order interpolation, then pointDetermination is hit, interpolation work is completed；

If first straight line for being parallel to Y-axis of left nozzle printing is in first right X-axis for being parallel to Y-axis straight line of right nozzle printing(+printer definition X-direction precision * (the best vertical element number n-1 of registration)) is inputted in total kilometres order interpolation, then pointDetermination is hit, interpolation work is completed.