JP4393850B2 - Surface mount machine - Google Patents

Description

  In the present invention, a board such as a printed board is carried in and installed at a mounting work position, and an electronic component such as an IC is adsorbed from a component supply unit by a head unit including a mounting head, and the predetermined position on the printed board is obtained. The present invention relates to a surface mounter that is to be mounted on a surface.

  Conventionally, a surface in which an electronic component such as an IC is sucked from a component supply unit and mounted on a printed circuit board positioned at a mounting work position by a movable head unit including one or a plurality of mounting heads. A mounting machine is generally known (for example, Patent Document 1).

In this type of surface mounter, for example, a component supply unit having a large number of feeders arranged so as to supply various components is equipped, and a component supply unit unit having a predetermined number of tape feeders arranged in parallel is equipped. Yes. In the case where the head unit includes a plurality of mounting heads, after the components are adsorbed simultaneously or continuously from the plurality of feeders of the component supply unit by the mounting heads, the head unit is printed on the printed circuit board of the component supply unit. The components are sequentially mounted from the mounting heads onto the printed circuit board.
JP-A-5-4133

  In this type of mounting machine, for example, when the head unit is equipped with a plurality of mounting heads, if the feeder is arranged so that the components on the printed circuit board that are close to the component mounting position can be simultaneously picked up by the plurality of mounting heads, tact As the time of the feeder is reduced, the placement of the feeder greatly affects the mounting efficiency. Therefore, it is possible to set the optimal feeder placement (referred to as optimization) to increase the mounting efficiency according to the printed circuit board to be mounted. Has been done.

  However, since this optimization is an optimization for a specific printed circuit board (that is, for each type), from the viewpoint of increasing productivity when mounting multiple types of printed circuit boards with the same surface mounter. Is not necessarily enough. In other words, even if the mounting efficiency for each board is improved, for example, when the type of board to be mounted changes, it is necessary to make a significant change in the feeder arrangement each time. In particular, in the case of high-mix, low-volume production, frequent setup changes are required, so the time spent on it is a major cause that hinders the improvement of mounting efficiency, and the total productivity (production board per unit time) Number) is difficult to increase. Therefore, there is still room for improvement in this respect.

  The present invention has been made in view of the above circumstances, and it is possible to increase the total productivity (the number of production boards per unit time) by performing the mounting process of a plurality of types of printed boards more efficiently. Objective.

  In order to solve the above-mentioned problems, the present invention sets a plurality of types of boards at a mounting work position according to a set production order, and uses the mounting head of the head unit including a mounting head for component suction to A surface mounter that picks up components from a supply unit and mounts them on a board set at the mounting work position, and affects the time required for changeover according to the change of the board type in the production information for each type of board. Storage means for storing certain information, information for determining the priority for a plurality of predetermined conditions for determining the production order, and among the plurality of types of substrates Based on an input operation unit capable of inputting information for specifying a substrate to be produced first, information input by operation of the input operation unit, and information stored in the storage unit A production order determining means for determining the production order by sequentially specifying the types of boards to be produced thereafter on the basis of the board to be produced first, the production order determining means comprising: In the case where there are a plurality of types of substrates that have the same priority order as the next type of substrate to be produced in turn, and there are a plurality of types of substrates that have the same setup change time, in accordance with the condition of the highest priority. Is configured to specify the type of the substrate to be produced next based on the condition of the lower priority order among the plurality of conditions.

  In this configuration, the input operation unit is configured to be able to select an arbitrary plurality of conditions from the plurality of conditions and to be able to input information for specifying the priority order for the selected conditions. (Claim 2).

Further, preferably includes display means for displaying in order to notify the production order determined by the production sequence determining means (claim 3).

  Here, in the description of claim 1, “production information” refers to information on a mounted component such as the type and size of a component to be mounted on a board, the size of the board, the type, number, and position of the mounted components. Information on board production, information on component supply such as the type, number and arrangement of component supply means for supplying mounting components, information on jigs such as the type and number of jigs used during mounting processing, etc. It means all the basic information.

  According to the surface mounter of the present invention, the production order of other boards (types) is sequentially set in order from the one with the shortest setup change time when changing the kind of board, based on the board to be produced first. Therefore, productivity (the number of production substrates per unit time) can be effectively increased.

  A preferred embodiment of the present invention will be described with reference to the drawings.

  1 and 2 schematically show an example of a surface mounter of the present invention (a surface mounter that implements the component mounting method of the present invention; hereinafter simply referred to as a mounter). In these drawings, a printed circuit board conveying conveyor 2 is disposed on the base 1 of the mounting machine body so that the printed circuit board P is conveyed on the conveyor 2 and stopped at a predetermined mounting work position. It has become.

  A board cradle 3 (jig) that supports the printed circuit board P from below is provided at the mounting work position so as to be able to move up and down, and the base cradle is displaced from the standby position at the descending end to the rising end position. Accordingly, the printed circuit board P is positioned in a lifted state by the support pins erected on the base cradle. In addition, the size, the number, and the arrangement of the support pins on the board cradle are set for each type of the printed board P. For example, when the type of the mounting board is changed due to the change of the production lot, the support pins are supported by the operator. The arrangement of pins is changed.

  On the front and rear sides of the conveyor 2, component supply units 4 are respectively provided. Each component supply unit 4 is provided with a plurality of component supply units. In the illustrated example, two component supply unit units are provided in parallel in the X-axis direction, so that a total of four component supply unit units ( The component supply unit units 4 </ b> A to 4 </ b> D) are arranged on the front and rear sides of the conveyor 2.

  Each of the component supply unit units 4A to 4D is provided with a plurality of rows of tape feeders 5. Since the tape feeder 5 is generally known, detailed illustration and description thereof will be omitted. However, a tape holding and holding small electronic components at predetermined intervals is led out from the reel, and the tape feeder 5 is disposed at the front of the tape feeder. The component is picked up from the tape by the mounting head 18 which will be described later, and the tape is drawn out as the component is taken out by the feeding mechanism.

  Although not shown in detail, each of the component supply unit units 4A to 4D is supported by a predetermined mounting portion of the mounting machine body, and is attached to the mounting machine body by being clamped by the clamping means. By releasing the clamp, each of the component supply unit units 4A to 4D can be detached from the mounting machine body, and the component supply unit units 4A to 4D including the multiple rows of tape feeders 5 can be collectively replaced.

  The component supply unit units 4A to 4D are individually mounted on a collective exchange cart 20 as shown in FIG. The collective exchanging carriage 20 has a support portion 22 for the component supply unit 4A to 4D at its upper end and a caster 24 at its lower end to freely support the component supply unit 4A to 4D. It can move. A plurality of component supply units and batch exchange carts are prepared so as to correspond to various types of printed circuit boards P to be mounted, and these component supply units are selectively assembled to the mounting machine body. ing.

  On the other hand, as shown in FIGS. 1 and 2, a head unit 6 for mounting components is provided above the base 1. The head unit 6 is movable over the component supply unit 4 and the mounting work position where the printed circuit board 3 is located, and the X-axis direction (direction parallel to the conveyor 2) and the Y-axis direction (direction orthogonal to the conveyor 2). It is possible to move to.

  That is, a fixed rail 7 in the Y-axis direction and a ball screw shaft 8 that is rotationally driven by a Y-axis servomotor 9 are disposed on the base 1, and a head unit support member 11 is disposed on the fixed rail 7. And a nut portion 12 provided on the support member 11 is screwed onto the ball screw shaft 8. The support member 11 is provided with a guide member 13 in the X-axis direction and a ball screw shaft 14 driven by an X-axis servo motor 15, and the head unit 6 is movably held by the guide member 13. A nut portion (not shown) provided on the head unit 6 is screwed onto the ball screw shaft 14. The support member 11 is moved in the Y-axis direction by the operation of the Y-axis servo motor 9, and the head unit 6 is moved in the X-axis direction with respect to the support member 11 by the operation of the X-axis servo motor 15. ing.

  A plurality of mounting heads 18 for mounting components are mounted on the head unit 6, and in this embodiment, eight mounting heads 18 are mounted in a line at equal intervals in the X-axis direction.

  Each mounting head 18 can move in the Z-axis direction and rotate around the R-axis (nozzle center axis) with respect to the frame of the head unit 6. It is driven by means. Further, each mounting head 18 is provided with a suction nozzle 18a at its tip (lower end), and negative pressure is supplied to the tip of the suction nozzle from a negative pressure supply means (not shown). Parts are attracted by suction force.

  FIG. 4 shows a control system of the mounting machine. In this figure, a control unit 30 provided for a mounting line including the mounting machine controls a well-known CPU that executes a logical operation and the CPU. It is composed of a ROM for storing various programs in advance and a RAM for temporarily storing various data during operation of the apparatus. As its functional configuration, a mounting control means 31, a production order setting means 32, and a data storage means 33 etc. are included.

  The mounting control means 31 controls the Y-axis and X-axis servomotors 9 and 15 and the ascending / descending driving means and the rotation driving means of the mounting head 18 in accordance with a program stored in advance, so that the components from the component supply unit are controlled. Mounting operation such as suction and mounting of components on the printed circuit board P is comprehensively controlled.

  The production order setting unit 32 includes input information from the input operation unit 34 by an operator's operation, production information stored in the data storage unit 33, for example, mounting component information such as the type and size of components to be mounted, and the printed circuit board P. Reflow ID, board cradle ID, group ID, board component number (type), number, position, and other board information, printed board P type, component supply units 4A to 4D and feeder 5 placement, etc. Among the information on the production of the printed circuit board P such as the component supply information, the jig information that associates the type of the printed circuit board P and the type of the circuit board cradle, etc. Based on the influential information, the production sequence, that is, for the plurality of types of printed circuit boards P, so that the total work time of the day is the shortest under a certain condition. Determining the order (type of order) when performing instrumentation processing. Note that the production order set by the production order setting means 32 is displayed on the display means 35 such as a CRT so that the operator is notified.

  Next, the process for determining the production order of the printed circuit boards P performed in the production order setting means 32 will be described with reference to the flowchart of FIG.

  First, as a premise of this process, the operator operates the input operation unit 34 to select whether the production order of the printed circuit board P is set manually or automatically. If the manual setting is selected, the production order is further input. On the other hand, if the automatic setting is selected, the priority order of the sort conditions is input. Here, the sort condition is a condition for determining the production order of the printed circuit boards P (a condition for rearranging the production order). In this embodiment, the sort condition is (1) component type coincidence, and (2) component supply. There are six items of unit coincidence (denoted as coincidence of carriage in the figure), (3) reflow ID, (4) board cradle ID, (5) group, and (6) user setting. The operator selects an arbitrary sort condition by the operation of 34 and inputs a priority order for the condition. FIG. 6 shows an example in which the priority order of the set sorting conditions is displayed on the display means 35. In this example, the priority order is set in the order of (1) → (6). Hereinafter, specific processing contents will be described based on the setting contents.

  Assuming that the above data has been input, when the operator operates a production sequence display key (not shown) on the input operation unit 34, this flowchart starts.

  First, in step S1, it is determined whether or not automatic sort processing for various types of printed circuit boards P is executed (step S1). Here, if it is determined not to execute, that is, if the manual setting of the production order is selected, the process proceeds to step S10 and the production order set manually is displayed as a list on the display means 35 and this flowchart is shown. finish.

  On the other hand, if it is determined in step S1 that the automatic sort process is to be executed, the sort priority data is read, and first, “part type match degree” is set as the first sort priority. It is determined whether or not (steps S2 and S3).

  Here, if it is determined that it is set, the process proceeds to step S11, and the production order of the printed circuit boards P is set based on the sort condition. Specifically, the board information and the component supply information are read from the data storage means 33 to the production order setting means 32, and a printed board P (referred to as a reference board P) that performs a mounting process first among a plurality of types of printed boards P is used as a reference. The production order is set in the order in which there are many types of components overlapping with the mounting components with respect to the printed circuit board P to be mounted first, and there are also many overlapping components at the position of the tape feeder 5 that supplies the overlapping components. . The reference board P is arbitrarily selected from among the printed boards P included in the production plan for the day by operating the input operation unit 34 of the operator.

  After the process of step S11, the process proceeds to step S9, and whether there is a printed circuit board P having the same sort level under this sort condition, that is, a plurality of types in which the number of overlapping parts and the overlapping degree of the position of the tape feeder 5 are the same. It is determined whether or not the printed circuit board P exists. Here, if it is determined that it does not exist, the process proceeds to step S10, where the production order of the automatically set printed circuit boards P is displayed as a list on the display means 35 (see FIG. 7), and this flowchart ends.

  FIG. 7 is an example in which seven types of printed circuit boards P (PCB1 to PCB7) included in the production plan for the day are set as the reference circuit board, and the production order is set using “part type coincidence” as the sorting condition. , (A) shows a list display before setting, that is, when a production plan is input, and (b) shows a list display after execution of an automatic sort process. In this example, the printed circuit boards P are displayed in order from the top in the set production order, and the number of parts (tape feeders 5) whose priorities do not overlap with the previous printed circuit board P is the number (pieces). The number of overlapping parts (tape feeder 5) is displayed in a graph for each of the part supply unit units 4A to 4D. FIG. 7 is a display example when two mounting machines (Machine 1 and Machine 2) are connected, and the production order of the printed circuit board P is set based on the component supply information of both mounting machines. it's shown.

  If it is determined in step S9 that there are printed circuit boards P having the same sort level, it is determined whether or not the next priority order sort condition is input (step S17). If it is determined, the process proceeds to step S10, and the display means 35 displays a list display at that stage and a message requesting another sort condition, for example.

  On the other hand, if it is determined in step S17 that the next priority order sort condition has been input, the priority order is set as the target order, and the process proceeds to step S3. That is, when there is a printed circuit board P (a plurality of types of printed circuit boards P that cannot be superior or inferior) for which the production order could not be set under the first sort condition (“part type coincidence degree”), Which of the above conditions (1) to (6) is set as the second-order sort condition is determined by the processing in steps S3 to S8, and the corresponding sort condition (in this embodiment, “cart coincidence degree”). )), The processing of step S11 to step S16 is executed to set the order of the printed circuit boards P that could not be set in order. If the production order cannot be set even with the second highest sort condition, the order is further switched to the third sort condition. After that, the lower priority sort is performed until the production order is set. The production order setting process is repeatedly performed while sequentially switching to the conditions. When the production order of the printed circuit board P is finally set, the order is displayed. When the order cannot be set, the fact is displayed in step S10. It is displayed on the means 35.

  In the above description, only the case where the sort condition is “part type coincidence” (the process of step S12) is described as a specific production order setting method based on the sort condition. However, the production based on other sort conditions is described. The order setting process is performed as follows.

  First, when it is determined that the “cart coincidence degree” is set (YES in step S4), the component supply information is read to the production order setting unit 32, and the mounting process is first performed based on the reference board P. The production order of the printed circuit boards P is set in the order in which there are many overlapping parts among the component supply unit units 4A to 4D used for the processing of the printed circuit board P to be performed (step S12). In this case, the overlapping parts supply unit 4A to 4D are required to have the same arrangement of the tape feeder 5a included therein.

  If it is determined that the “reflow ID” is set (YES in step S5), the board information is read to the production sequence setting means 32, and the reflow furnace temperature is first mounted on the basis of the reference board P. The production order of the printed circuit boards P is set in the order close to the reflow furnace temperature of the printed circuit board P to be processed (step S13). That is, the data storage means 33 stores the correspondence between “reflow ID” given for each type of printed circuit board P as the substrate information and the reflow furnace temperature (processing temperature in the reflow apparatus) as table data. In step S13, based on this board information, the production sequence of the printed board P is set so that the adjustment temperature of the reflow apparatus accompanying the production board switching is reduced.

  If it is determined that the “board cradle ID” is set (YES in step S6), the board information is read out to the production order setting means 32, and the mounting process is first performed based on the reference board P. The production order of the printed circuit boards P is set in the descending order of the support pins of the substrate cradle 3 used for the processing of the printed circuit boards P (step S14). That is, in the data storage means 33, the correspondence relationship between the “substrate cradle ID” given for each type of the printed circuit board P as the jig information and the data (support pin type, size, number, arrangement) related to the support pins. Is stored as table data, and in step S14, the production sequence of the printed circuit board P is set based on the jig information so that the number of pin changes of the substrate cradle 3 associated with the production substrate switching is reduced.

  If it is determined that “group” is set (YES in step S7), the board information is read out to the production order setting unit 32, and the printed board P that is first subjected to the mounting process based on the reference board P is used. The production order of the printed circuit boards P is set in order from the group corresponding to the common group (step S15). That is, each printed circuit board P can be mounted without changing the set-up in terms of the type of mounted component, that is, the group can be mounted using the common component supply unit 4A to 4D. In step S15, based on the board information stored in the data storage means 33, the production order of the printed boards P is set so that the types of printed boards P belonging to the same group can be processed continuously.

  If it is determined that “user setting” is set (YES in step S8), the user setting information stored in advance in the data storage means 33 is read to the production order setting means 32, and the user setting information The production order of the printed circuit board P is set based on the specific contents (step S16). The user setting information includes, for example, the size (width) of the printed board P. In this case, the reference board P is used as a reference so that the interval adjustment of the conveyor 2 accompanying the change of the production board can be performed in a short time. The production order of the printed circuit boards P is set in order of size closer to the size of the printed circuit board P to be mounted.

  According to the mounting machine as described above, since the production order of a plurality of types of printed circuit boards P is set based on various sort conditions as described above, the total productivity of the printed circuit boards P (per unit time within the operation time) The number of production boards) can be effectively increased.

  That is, when the production order of the printed circuit boards P is set based on the “part type coincidence degree” as the sorting condition, the types of mounted parts of the printed circuit boards processed continuously and the tape feeder 5 used Since the commonality of types and arrangements is increased, it is possible to perform setup operations such as replacement of tape feeders 5 and arrangement changes in a shorter time when switching production boards (types). Therefore, the total working time of the day is reasonable compared to the conventional method (component mounting method) in which the printed circuit board production order is set in the order of input of the production plan, for example, ignoring the commonality of the mounted parts. Will be shortened.

  In particular, in this mounting machine, since the sort condition can be arbitrarily selected from a plurality of conditions as the sort condition, for example, the operator can use the experience to select the optimum sort condition, so that the specific condition of the day is selected. Productivity can be effectively increased based on the production plan. That is, when “cart coincidence” or “group” is selected as the sort condition, the tape feeder 5 and the parts supply accompanying the change of the production board are the same as when “part type coincidence” is selected as the sort condition. It is possible to replace and replace the unit units 4A to 4D in a short time. Also, when “substrate cradle ID” is selected, the pins of the substrate cradle 3 are changed when the production substrate is changed. Such operations can be performed in a short time, and when “reflow ID” is selected, the temperature adjustment of the reflow apparatus accompanying the change of the production substrate can be performed in a shorter time. Therefore, it is possible to increase the productivity of the printed circuit board P by selecting the optimum condition from these sort conditions according to the specific production plan and setting the production order.

  In addition, in this mounting machine, a plurality of sort conditions can be selected in advance as described above, and if a priority order is set for these conditions, the production order setting process is performed as described above. Since it is configured to try in order from the highest condition, even if the production order cannot be set under one sort condition, that is, there is a type of printed circuit board P that does not have superiority or inferiority, another sort condition is set. The production order can be set automatically based on. Therefore, there is an advantage that the production order of the printed circuit boards P can be set more reliably without the trouble of inputting the sort conditions again.

By the way, the mounting machine of the embodiment described above is an example of an embodiment of a surface mounting machine according to the present invention (a surface mounting machine capable of performing the component mounting method according to the present invention), and a specific example thereof. The configuration (and component mounting method) can be changed as appropriate without departing from the scope of the present invention. For example, the following aspects can also be taken.
[1] In addition to setting the production order based on a specific sort condition as in the embodiment, for example, assuming that all production orders are assumed for a plurality of types of printed circuit boards P, production is performed in each production order. By calculating (simulating) the total time (time required for production on that day) in the production order setting means 32, the production order in which the total time is the shortest among the results may be set as the setting order. . In this case, the time required for replacement and replacement of the tape feeder 5 and the component supply units 4A to 4D, the detachment time per support pin of the substrate cradle 3, or the temperature adjustment time per unit temperature in the reflow device, etc. Basic data relating to the setup change time may be stored in the data storage unit 33 in advance, and the total time may be calculated based on this data and the board information or component supply information.
[2] In the embodiment, the set production order of the printed circuit boards P is displayed by the display means 35. For example, the printed circuit board P is automatically carried from the standby location to the mounting machine and mounted. Such a display can be omitted when the system is configured to perform the above. However, if the set specific production order can be displayed as a list as in the above embodiment, the operator can grasp the contents in advance, for example, preparing the tape feeder 5 to be replaced at an early stage. For example, the production board can be switched more smoothly, which is more advantageous in increasing the productivity of the printed board P.
[3] In the embodiment, the sort conditions include “part type coincidence”, “cart coincidence (part supply unit)”, “reflow ID”, “board cradle ID”, “group”, and “user setting”. Of course, other items can be provided as long as the conditions are effective from the viewpoint of shortening the total production time including the setup change time. As for the automatic sorting process, in addition to setting the order in priority from the one that satisfies the sorting condition with respect to the printed circuit board P to be mounted first, based on the reference board P as described above, Based on the comparison with only the reference substrate P, the order may be set preferentially from those satisfying the sorting condition. Further, as a process when a plurality of types of printed circuit boards P without superiority or inferiority are included, the priority order is switched to a lower sorting condition as described above, and the printed circuit board P (multiple types of printed circuit boards without superiority or inferiority) In addition to setting the order of P), the order of production may be set again for all types of printed circuit boards P, for example, by switching to a lower priority sort condition.
[4] In the embodiment, an example will be described in which the order of all types of printed circuit boards P (PCB1 to PCB7) included in the production plan for the day is set based on only one type of printed circuit board P (PCB1). However, the printed circuit boards P included in the production plan for the day may be divided into a plurality of groups, and the printed circuit board P serving as a reference may be set for each group, and the sort conditions may be set to set the production order. For example, seven types of printed circuit boards P (PCB1 to PCB7) are divided into two groups, the production order is set for each group, and after the production of the first printed circuit board P in the first group, the component supply units 4A to 4D Are replaced with one corresponding to the first printed circuit board P of the second group to produce the first printed circuit board P of the second group, and during the production, the component supply unit 4A to 4 4D is replaced with the one corresponding to the production of the second printed circuit board P of the first group, and after the production of the first printed circuit board P of the second group, the parts supply unit 4A to 4D are replaced at once. The first group of printed circuit boards P and the second group are exchanged while the component supply unit units 4A to 4D are collectively replaced, such as production of the second printed circuit board P of one group. The printed circuit boards P of the other group are produced during the production of the printed circuit boards P belonging to one group (rearrangement of the tape feeders 5 of the component supply units 4A to 4D). ) May be performed. In this way, when the production type is switched, it is only necessary to collectively replace the component supply units 4A to 4D. Therefore, for example, compared with the case where the tape feeder 5 is directly replaced with respect to the component supply unit 4, it is possible to shorten the mounting machine stop time at the time of the setup change, which is effective in improving the total productivity. Become. The group in this case is not limited to two groups, and may be divided into three groups or more. In short, the groups may be divided so that the printed circuit board P can be produced efficiently.

1 is a schematic plan view showing a surface mounter according to the present invention (a surface mounter capable of performing a component mounting method according to the present invention). It is a front schematic diagram of a surface mounter. It is a front view of a collective exchange cart. It is a block diagram which shows the arithmetic control system which performs the process for determining the production order of a printed circuit board, a process, such as mounting control. It is a flowchart which shows the process for determining the production order of a printed circuit board. It is a figure which shows an example which displayed the sort condition and its priority on the display means. It is an example of the display by a display means, (a) is a list display before the production order is set, and (b) is when the production order is set based on the sort condition (“part type match degree”). It is a figure which shows a list display.

DESCRIPTION OF SYMBOLS 3 Substrate stand 4A-4D Component supply part unit 5 Tape feeder 30 Control unit 31 Mounting control means 32 Production order setting means 33 Data storage means 34 Input operation part P Printed circuit board

Claims (3)

A plurality of types of boards are set at a mounting work position according to a set production sequence, and the mounting work position is obtained by sucking a component from a component supply unit by the mounting head of the head unit having a mounting head for picking up the component. A surface mounter for mounting on a substrate set in
Storage means for storing information affecting the setup change time associated with the change of the substrate type among the production information for each type of the substrate,
Information for specifying these priorities for a plurality of predetermined conditions that are conditions for determining the production order, and for specifying a board to be produced first among the plurality of types of boards An input operation unit capable of inputting information;
The production is performed by sequentially specifying the types of substrates to be produced thereafter on the basis of the first production substrate based on information input by operation of the input operation unit and information stored in the storage means. Production order determining means for determining the order,
The production order determination means sequentially specifies the type of the substrate with the shortest changeover time as the type of substrate to be produced next in accordance with the condition of the highest priority among the plurality of conditions. When there are a plurality of board types having the same replacement time, the type of the board to be produced next is specified based on a condition having a lower priority order among the plurality of conditions. Surface mount machine. In the surface mounting machine according to claim 1,
The input operation unit is configured to be able to select any of a plurality of conditions from the plurality of conditions and to be able to input information for specifying the priority order for the selected conditions. A featured surface mounter. In the surface mounting machine according to claim 1 or 2,
Surface mounter which is characterized in that it comprises a display means for displaying in order to notify the production order determined by the production sequence determining means.

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