Additive manufacturing, known as three-dimensional (3D) printing, enables 3D parts to be fabricated layer-by-layer based on a 3D model of the part or parts to be fabricated. One type of 3D printing involves forming successive layers of a build material, such as a powdered build material, and successively solidifying portions of each layer of the build material to form each layer of the part or parts being fabricated.
Example implementations described herein relate to a scan carriage of a print apparatus. In various examples described herein, a print apparatus may be a two dimensional (2D) print apparatus and/or a three dimensional (3D) print apparatus. In some examples, a system may include a print carriage to transit across a print zone of the print apparatus and a scan carriage selectably attachable to the print carriage to transit across the print zone of the print apparatus. “Transit” is intended to mean movement into and/or travel across the print zone described herein, which may be a one-way or a two-way transit of the print carriage as many times as intended for a print operation and/or of the scan carriage for a scan operation.
As described herein, the print zone 105 is intended to include a 3D volume in which a 3D print operation may be performed to build and/or print objects on a buildbed (e.g., as shown and described in connection with the print zone 205 of an example 3D print apparatus 215 in
The engagement component 108 shown and described in connection with
In contrast to the examples of 2D and/or 3D print apparatuses described herein, implementations of 2D printers (e.g., ink-jet printers, laser printers, etc.) may, in some instances, have a scanner to provide information about print quality, alignment, etc., which can be used to maintain or improve print quality. Such a scanner for the 2D printer may be mounted somewhere in a print path for a print substrate (e.g., a path upon which paper may progress during a print operation) or there may be an attachment separate from, but close to, the print path through which printed pages are sent to be scanned.
Placement of a scanner as such may be problematic in a 2D and/or a 3D print apparatus. For example, placement of a scanner by mounting the scanner anywhere near a print zone of a 3D print apparatus may expose the scanner to conditions that may be detrimental to functionality of the scanner. The conditions that may be detrimental to functionality of a scanner of a 3D print apparatus may include, for example, heat, build powder, molten material, and/or print agents, such as, fusing agents, detailing agents, colorants, etc. Some implementations of 3D print apparatuses may mitigate the effect of such conditions by, for instance, using a separate scanner mounted outside the 3D print apparatus and printing patterns on a sheet of paper that may then manually be fed through the scanner (e.g., for calibration of the 3D print apparatus). Some examples of 2D print apparatuses may utilize heat (e.g., provided by heating and/or curing lamps, etc.) that may be detrimental to functionality of the scanner.
Although specific 3D printing apparatuses and processes are described herein (e.g., a powder based 3D print apparatus and process), other 3D printing techniques such as laser sintering (e.g., selective laser sintering, metal laser sintering, etc.), stereolithography, continuous liquid interface production, etc., are contemplated within the scope of the disclosure. In some examples, a 3D print apparatus may implement a powder based 3D printing process. In such examples, after the 3D printing process is completed, a volume of fused print (build) material and a volume of unfused print (build) material may remain in the print zone 105 described herein. The unfused print material (build powder) may contribute to the conditions that may be detrimental to functionality of the scanner.
In contrast to some scanning implementations, this disclosure is directed to mounting a scanbar (e.g., a portion of which is shown at 110 in
As described herein, a scanbar 110 is intended to mean an imaging module (e.g., a charge coupled device, a camera, etc.), scanning optics, and/or associated circuitry to enable performance of the scan operation 111. The scan carriage 107 is intended to mean a physical structure capable of supporting the scanbar 110, physical and electrical connections, and/or a drive unit, etc., to carry the scanbar 110 into or across the print zone 105 to enable performance of the scan operation 111 on a predefined object (not shown) in the print zone 105. Among various examples, the predefined object may be an outer surface of a 3D fabricated part, an uppermost layer of the 3D fabricated part visible at a time point prior to the outer surface being printed (e.g., at a time point before another layer may be printed over the previously uppermost layer); a calibration pattern printed (e.g., a grid or some other pattern printed from ink or another colorant to enable calibration of a printbar and/or the 3D print apparatus) on a sheet of print substrate (e.g., paper, among various other print substrates), a calibration pattern printed from a print material used to print the 3D fabricated part (e.g., printed on a print substrate from the print material used to form the 3D fabricated part), and/or a calibration pattern printed on the uppermost layer and/or the outer surface of the 3D fabricated part (e.g., from build powder and/or print agents, such as ink or another colorant). In some examples, the predefined object may be a grid or some other pattern formed (e.g., printed, built, and/or etched, etc.) on the buildbed (e.g., during fabrication of the buildbed). Scans of such predefined objects performed by the scanbar 110 may be used for calibration of the printbar 106 and/or the 3D print apparatus (e.g., as shown at 215 in
In some examples, a print operation (e.g., as indicated at 109) and the scan operation 111 may be performed in a single transit 103 across the print zone 105 (e.g., combined first transit 105-1 and second transit 105-2 across the print zone). For example, a printbar 106 associated with the print carriage 102 may be used to print a calibration pattern in the print zone 105 when a 3D fabricated part is not being built and/or the calibration pattern is not being printed from the material used to print the 3D fabricated part (e.g., when build powder is not being used). Printing as just described may enable the calibration pattern, for example, to be scanned in the print zone 105 using the scanbar 110 associated with the scan carriage 107, while the scan carriage 107 is attached to the print carriage 102, during the same transit 103 across the print zone 105. In some examples, the conditions during a 3D print operation may not be detrimental to functionality of a scanbar 110, which would enable the scan carriage 107 to be attached to the print carriage 102 during the same transit 103 across the print zone 105 and a scan operation 111 to be performed by the scanbar 110 during the same transit as the print operation 109 is performed using the printbar 106.
As described herein, the print carriage 102 is intended to mean a physical structure capable of supporting a printbar 106 (e.g., a portion of which is shown at 106 in
The printbar 110 may transit 103 across the print zone 105-1 to enable performance of a print operation (e.g., performance of the print operation indicated at 109 connected to printbar 106). In some examples, the print operation 109 may be performed at a static positioning of the print carriage 102 and/or printbar 106 in the print zone 105-1. The scan carriage 102 may carry the scanbar 110 that scans the predefined object in the print zone during a second transit 103 across the print zone 105-2, where the first transit 105-1 and second transit 105-2 are separate transits 103 across the print zone. In some examples, the scan carriage 107 may be attached to the print carriage 102 during the first transit across the print zone 105-1 and the second transit across the print zone 105-2, with the print operation 109 being performed during the first transit across the print zone 105-1 and the scan operation being performed during the second transit across the print zone 105-2
The scan carriage 107 may be selectably attachable (e.g., by a first actuation of the engagement component 108) to scan across the print zone 105-2 when a print operation 109 is not being performed and selectably detachable (e.g., by a second actuation of the engagement component 108). Detachment of the scan carriage 107 may allow the scan carriage 107, and the scanbar 110, to stay out of the print zone 105-1 during performance of the print operation 109, and therefore away from the associated potentially detrimental conditions. The scan carriage 107 may stay in a location (e.g., an enclosure as shown and described in connection with
Hence, a number of actions may be reduced that are performed (e.g., by a user) to move the predefined object outside of the print zone 105 to be scanned by a scanner, for example, to reduce the exposure to the potentially detrimental conditions. Utilizing a scan carriage 107 that is selectably attachable and detachable from the print carriage 102 for movement into and/or travel across the print zone 105 may have other effects. For example, having the scan carriage 107, an associated scanbar 110, the print carriage 102, and an associated printbar 106, included in (e.g., connected to) the same structural components of the 3D print apparatus may enable more accurate correlation of print and scan coordinates (e.g., for calibration of the printbar 106 based on scan operations 111 performed using the scanbar 110, among other possibilities).
In various examples, a 3D print apparatus 215 may include various components to print the 3D fabricated part and/or the predefined object (e.g., as shown within oval 217 in
Components within the oval 217 may include those within a print zone 205 of the 3D print apparatus 215. The print zone 205 may include components such as the print carriage 202, printbar 206, scan carriage 207, and/or scanbar 210, at least during print and/or scan operations. The print zone 215 may, by way of example and not by way of limitation, include other components, such as a build area 219 (e.g., a 3D build bucket in a lower part of the print zone 205 within which the 3D fabricated part and/or the predefined object are formed), a build surface (not shown), and/or a motor (not shown) to actuate movement of a portion of the build surface (e.g., a platen) during printing of the 3D fabricated part and/or the predefined object. In some examples, the build bucket may be an integral part of the 3D print apparatus 215; however, in some examples, the build bucket may be removable or detachable from the 3D print apparatus 215.
The oval 217 shown in
Various components, areas, volumes, etc., may be associated with and/or positioned within the portion 218 of oval 217. For example, as shown in
The portion 218 also may include a location 222 (e.g., a 3D enclosure) that is separated from the print zone 205 and/or the printbar service area 221 in which the scan carriage 207 and scanbar 210 may be positioned (e.g., isolated) during performance of a print operation 109 in the print zone 205. As described herein, the scan carriage 202 may be moved to the separated location 222 to reside therein in order to be isolated from conditions during the print operation 109 (e.g., heat, build powder, etc.) that may be detrimental to functionality of the scan carriage 207 and/or scanbar 210.
The separated location 222 may, in various examples, include a movable barrier 224. The movable barrier 224 may, for example, be a door that is selectably movable (e.g., opened) to enable access to the separated location 222, in which the scan carriage 207 was previously enclosed, by sliding the door, rotating the door on a hinge, and/or removing the door, among other possibilities, to provide access to the separated location 222. As such, the movable barrier 224 may enable a selectable isolation of the separated location 222 from the print zone 205 and/or the printbar service area 221 during the performance of the print operation 109, a selectable access to the scan carriage 207 for attachment to the print carriage 202 after the performance of the print operation 109, and/or a selectable access to the separated location 222 to selectably detach the scan carriage 207 for storage therein after performance of a scan operation 111. In some examples, the scan carriage 207 may reside in the separated location 222 as a default location except during performance of a scan operation 111. In some examples, the moveable barrier 224 may be closed during a scan operation 109 using the scan carriage 207 and the scanbar 210.
Accordingly, the scan carriage 207 may be selectably attached to the print carriage 202 after the print operation 109 for removal from the separated location 222 and for transit 103 across the print zone 205. The scan carriage 207 may be selectably attached to the print carriage 202 by selectable engagement (e.g., coupling) of a first portion 208-1 of an engagement component 208 (e.g., associated with or formed as part of the print carriage 202) to a second portion 208-2 of the component engagement 208 (e.g., associated with or formed as part of the scan carriage 207), as shown and described in more detail in connection with
The transit 103 across the print zone 205 may be facilitated by the print carriage 202 and/or the attached scan carriage 207 being positioned on (e.g., mounted on or otherwise connected to) a transit component 225 (e.g., a rail, tracks, and/or a groove, among other possibilities) on which the print carriage 202 and/or the scan carriage 207 may be moved from the separated location 222 and/or the printbar service area 221 to the print zone 205 and, in some examples, beyond the print zone 205 (e.g., to the left of the print zone 205, as illustrated in
In various examples, a print apparatus (e.g., the 3D print apparatus 215 shown and described in connection with
In some examples, a motor associated with the print carriage 302 may drive rotation of wheels 331 connected to the print carriage 302 and/or the motor associated with the print carriage 302 may drive rotation of wheels 332 connected to the scan carriage 307 to enable the transit 303 across the print zone 305 on the transit component 325. In various examples, the print carriage 302 and/or the scan carriage 307 may not include wheels to facilitate transit. In various examples, the print carriage 302 may have a wheel or a plurality of wheels powered by the drive unit and the scan carriage 307 may have runners on the bottom to be dragged along the transit component 325 to enable the transit 303 across the print zone 305. In some examples, the print carriage 302 and/or the scan carriage 307 may be enabled to transit 303 across the print zone 305 on the transit component 325 via an electromagnetic levitation component (not shown).
The system 330 may include an engagement component 308 that enables, via interaction with the print carriage 302, a transit 303 of the scan carriage 307 across the print zone 305. In some examples, the engagement component 308 can include a first portion 308-1 of a hitch and a second portion 308-2 of the hitch to selectably attach (e.g., by selectable engagement of the two portions to complete the hitch) the print carriage 302 to the scan carriage 307 for the transit 303 across the print zone 305. For example, between print operations and/or after a print operation 109, the print carriage 302 may reside in the printbar service area 321 outside the print zone 305 and/or between scan operations and/or after a scan operation 111, the scan carriage 307 may reside in the separated location 322. The movable barrier 324-1 may be closed, as shown in the upper portion of
A scan operation 111 may be initiated in the print zone 305 between print operations and/or after completion of a print operation 109. For example, the scan operation 111 may be performed after a period of time has elapsed, or other operations have been performed, in order to reduce a level of the conditions (e.g., heat, aerosolized build powder, etc.) potentially detrimental to the scan carriage 307 and/or the associated scanbar.
To enable performance of the scan operation 111, the movable barrier 324-2 may be selectably opened, as shown in the lower portion of
In some examples, the engagement component 308 may be associated with, or may include, a transit component 325 (e.g., a rail, tracks, a groove, among other possibilities) on which the print carriage 302 and the scan carriage 307 are mountable to aim engagement of the hitch (e.g., as schematically shown in the lower part of the engagement component 308) to attach the print carriage 302 to the scan carriage 307. In the example shown in
The engagement component 308 (e.g., portion 308-1 and/or portion 308-2) may include, in various examples, a solenoid and/or spring (neither shown) that may be associated with either the print carriage 302 and/or the scan carriage 307. The solenoid and/or spring may be selectably actuatable to contribute to engagement of a hitch of the engagement component 308 between the print carriage 302 and the scan carriage 307.
For example, when the moveable barrier 324-2 is opened, the solenoid and/or spring may be used to increase a velocity and/or momentum 335 of the print carriage 302 on the transit component 325 toward the scan carriage 307 to contribute to engagement of the hitch. In some examples, the hitch may be engaged by the first portion 308-1 of the engagement component 308 entering the separated location 322 to engage the second portion 308-2 of the engagement component 308 associated with the scan carriage 307. The solenoid and/or spring may be used to increase a velocity and/or momentum 336 of the scan carriage 307 on the transit component 325 toward the print carriage 302 to contribute to engagement of the hitch. In some examples, the hitch may be engaged by the second portion 308-2 of the engagement component 308 entering the printbar service area 321 to engage the first portion 308-1 of the engagement component 308 associated with the print carriage 302. In some examples, a solenoid and/or a spring may be associated with both the print carriage 302 and the scan carriage 307 and may be used to increase a velocity and/or momentum 336 of the scan carriage 307 and the print carriage 302 on the transit component 325 toward each other to contribute to engagement of the hitch.
Hence, the print carriage 302 may carry a printbar (e.g., as shown at 206 in
The scan carriage 307 may carry a scanbar (e.g., as shown at 210 in
For example, an engagement component 408 that enables, via interaction with the print carriage 402, transit of the scan carriage 407 across the print zone 405 may enable the scan carriage 407 to be mounted on a first support structure 442 in the separated location 422. In the example shown in
The scan carriage 407 may be associated with, or may include, a support component 441 that facilitates support of the scan carriage 407 in the separated location 422. In some examples, the scan carriage 407 may be supported by the support component 441 engaging the first support structure 442 when the moveable barrier 424-1 is closed. The scan carriage 407 may be supported in the separated location 422 even though there may be no portion of the transit component 425 underneath the scan carriage 407. In the example shown in
When the moveable barrier 424-2 is opened, the print carriage 402 may engage the support component 441 by interaction with a second support structure 443, for example, associated with, or part of, the first portion 408-1 of the engagement component 408 associated with the print carriage 402. In some examples, wheels 431 connected to the print carriage 402 may enable the print carriage 402 to partially enter 435 the separated location 422 on the transit component 425 to engage the left side of the support component 441 with the second support structure 443 and/or engage the first portion 408-1 of the engagement component 408 associated with the print carriage 402 with the second portion 408-2 of the engagement component 408 associated with the scan carriage 407 to form the complete engagement component 408.
The print carriage 402 may then reverse direction 436 on the transit component 425 to disengage the right side of the support component 441 from the first support structure 442 and remove the scan carriage 407, supported by the print carriage 402, from the separated location 422 for transit across the print zone 405. In some examples, the solenoid and/or spring, described in connection with
For example, a second portion 508-2 of an engagement component 508 that enables, via interaction with the print carriage 502, transit of the scan carriage 507 across the print zone 505 may enable the scan carriage 507 to be mounted on a support structure (not shown) in the separated location 522 (e.g., as shown in the upper portion of
The separated location 522 illustrated in
In the example shown in
The transit component 525 is shown to not extend into a space below the separated location 522. However, in various examples, the transit component 525 may extend partially into the space below the separated location 522, or as far into the space below the separated location 522 to facilitate engagement of the first portion 508-1 of the engagement component 508 associated with the print carriage 502 with the second portion 508-2 of the engagement component 508 associated with the scan carriage 507 separate location in order to form the complete engagement component 508 (e.g., as shown in the lower portion of
In some examples, the scan carriage 507 may be supported by the support structure engaging a component (e.g., the first portion 508-1 of the engagement component 508) when the moveable barrier 524-1 is closed. The scan carriage 507 may be supported in the separated location 522, for example, by the support structure being associated with, or part of, the moveable barrier 524-1. As such, lowering and/or raising the scan carriage 507 may be facilitated by lowering and/or raising the moveable barrier (e.g., by selectable actuation of the motor).
When the moveable barrier 524-2 is opened, the print carriage 502 may engage the second portion 508-2 of the engagement component 508 associated with the scan carriage 507 by interaction with the first portion 508-1 of the engagement component 508 associated with the print carriage 502. In some examples, wheels 531 connected to the print carriage 502 may enable the print carriage 502 to partially enter 535 the space below the separated location 522 on the transit component 525 to engage the first portion 508-1 of the engagement component 508 associated with the print carriage 502 with the second portion 508-2 of the engagement component 508 associated with the scan carriage 507 to form the complete engagement component 508. The print carriage 502 may then reverse direction 536 on the transit component 525 to remove the scan carriage 507, supported by the print carriage 502, from the space below the separated location 522 for transit across the print zone 505. In some examples, the solenoid and/or spring, described in connection with
For example, the drive unit 662 may include, or may be, a motor. The motor may be connected (e.g., via engagement of a first portion 608-1 of an engagement component 608) to the print carriage 602 to drive (e.g., by rotation of wheels along a transit component 625) the print carriage 602 during transit 603 across the print zone 605 for performance of a print operation 109. After performance of the print operation 109, the drive unit 662 may drive the print carriage 602 toward the separated location 622 in which the scan carriage 607 resides behind a moveable barrier 624-1 that is closed. In various examples, the separated location 622 may be formed and/or positioned as shown and described in connection with
The first portion 608-1 and/or the second portion 608-2 of the engagement component 608 may be associated with, or may be part of, the exchange component for exchange of the drive unit 662 from the print carriage 602 to the scan carriage 607 to enable the scan carriage 607 to independently transit 603 across the print zone 605. For example, when the movable barrier 624-2 is opened, the drive unit 662 may be exchanged from the first portion 608-1 to the second portion 608-2 associated with the scan carriage 607 to independently drive (e.g., by rotation of wheels along the transit component 625) the scan carriage 607 during transit 603 across the print zone 605 for performance of a scan operation 611 using a scanbar 610.
Prior to performance of the scan operation 611, the print carriage may be moved along the transit component 625 (e.g., via the exchange component or otherwise) to a storage area 661 outside the print zone 605 and on an opposite side of the print zone 605 from a printbar service area 621. Storage of the print carriage 602 in the storage area 661 on the opposite side of the print zone 605 from the printbar service area 621 may enable the drive unit 662 to return the scan carriage 607 to the separated location 622 after performance of the scan operation 611. The drive unit 662 associated with the second portion 608-2 of the engagement component 608 is then accessible for exchange, via the exchange component, to the first portion 608-1 of the engagement component 608 associated with the print carriage 602 (e.g., for subsequent performance of a print operation 109).
In another example, the drive unit 662 may represent a drive arm that may be a portion of the exchange component visible in front of the back wall 216 shown and described in connection with
The exchange component may be selectably actuated to exchange the drive unit 662 (e.g., the drive arm). The drive arm may be exchanged by transfer of engagement of the drive arm with a first portion 608-1 of the engagement component 608 associated with the print carriage 602 to engagement with the second portion 608-2 of the engagement component 608 associated with the scan carriage 607, and vice versa. Hence, exchange of engagement of the drive arm, via the exchange component, may enable the print carriage 602 and the scan carriage 607 to independently transit 603 across the print zone 605.
The various examples shown in connection with
In some examples, the method 770 may include utilizing a drive unit (e.g., a motor as described in connection with
In some examples, the method 770 may include moving the scan carriage from a position in the separated location for attachment to a print carriage. Moving the scan carriage from the position may, among various examples, include detaching a support component (e.g., as shown at 441 and described in connection with
In the foregoing detailed description of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration how examples of the disclosure may be practiced. These examples are described in sufficient detail to enable those of ordinary skill in the art to practice the examples of this disclosure, and it is to be understood that other examples may be utilized and that process, electrical, and/or structural changes may be made without departing from the scope of the disclosure.
The figures herein follow a numbering convention in which the first digit corresponds to the drawing figure number and the remaining digits identify an element or component in the drawing. For example, reference numeral 102 may refer to element “02” in
Filing Document | Filing Date | Country | Kind |
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PCT/US2017/028831 | 4/21/2017 | WO | 00 |