JP4777209B2 - Parts supply device - Google Patents

Description

  The present invention relates to a component supply apparatus. In particular, the present invention also relates to a component supply device that can control power consumption by controlling an electric component supply device with a simple configuration even in a component supply device that is speeded up.

  In recent years, component mounters (also referred to as chip mounters) that mount electronic components (hereinafter referred to as components) on a printed circuit board are sensitive to the position at which the components are attracted in order to accurately attract the components to be miniaturized. An electric component supply device (hereinafter referred to as an electric feeder) equipped with a motor that can be adjusted to the above is used. Since about 100 of these electric feeders are mounted on a single component mounting machine and may be mounted and produced, it is possible to save energy by supplying power to the electric feeders that are not temporarily used during mounting production. Therefore, it is necessary to keep it to the minimum necessary.

  In Patent Documents 1 and 2, a dedicated control device is provided outside the component supply device in order to control the component supply device. A technique is described in which a maintenance state is detected and a power supply is detected by a control device and then cut off.

JP 2000-307297 A JP 2003-264399 A

  However, in a component mounter equipped with a dedicated control circuit that monitors and controls a conventional component supply device, the component supply device is increased, the factor of conditions for stopping the component supply device is increased, and the component feed speed of the component supply device is increased. The processing capacity of the control must be increased with the ups. Communication between the CPU of the component mounter main body and the component supply device or the like needs to perform serial communication at high speed, and real-time characteristics are required, and a real-time OS needs to be incorporated.

  For this reason, not only is the control board of the component mounter main body and the component supply device expensive, but the system is complicated, and further, the time and effort to optimize the entire system to save power and when changing the software contents There was a problem that enormous development costs would be required.

  An object of the present invention is to control an electric component supply device with a simple configuration to suppress power consumption even in a component supply device that is speeded up.

  The present invention provides a component supply apparatus equipped with a component mounter that produces a mounting board according to a production program that controls the operation of component mounting, and that includes a motor as a drive source for the operation of supplying components. Based on the above, a storage means for preliminarily storing a component mounting schedule for the operation of supplying a component in the component supply apparatus itself, and a component from the component supply apparatus itself based on the progress of the component mounting schedule held in the storage means Determining means for determining whether a period during which no operation is scheduled to be supplied is greater than or equal to a predetermined period, and when the determination means determines that a period during which the operation is not scheduled is greater than or equal to a predetermined period And the control means for causing the motor to enter a power saving mode.

  In particular, the progress of the component mounting schedule may be advanced in synchronization with a trigger signal from the component mounter.

  Further, the progress of the component mounting schedule may be stopped by a signal indicating a retry state from the component mounting machine.

  According to the present invention, each electric component supply device holds a component mounting schedule in advance, and based on this component mounting schedule, the motor of the component supply device is put into a power saving mode, so that the system is not complicated. However, while maintaining high-speed component supply, the electric component supply device can be put into the power saving mode by itself, and power consumption can be suppressed.

  In particular, when the component mounting schedule is advanced in synchronization with the trigger signal from the component mounter, the necessary component supply device can be moved simultaneously by the common trigger signal, which eliminates the need for high-speed serial communication. This device is unnecessary, and the system software development period can be shortened and labor can be saved.

In addition, if the signal indicating the retry status from the component mounter can be used to stop the progress of the component mounting schedule, the component mounting schedule will not be broken even if there is a suction error. Because rebuilding and re-transfer are not required,
High-speed implementation can be maintained.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view showing a component mounter equipped with an electric feeder according to the present invention.

  As shown in FIG. 1, the component mounting machine 10 includes a mounting head 14 provided with a suction nozzle 12 for sucking a component, an XY axis gantry 16 that moves the mounting head 14 in the XY axis direction, A board transport device 18 that transports the printed circuit board 2 and positions the printed circuit board 2 at a predetermined position, a control device 20 that controls the operation of component mounting in the component mounter 10, and a plurality of devices mounted in parallel on the front surface of the component mounter 10. And an electric feeder 30.

  The component mounter 10 produces a mounting board for mounting components on the printed board 2 in accordance with the production program of the control device 20.

  As shown in FIG. 2, the electric feeder 30 includes a stepping motor (hereinafter referred to as a motor) 32 as a drive source for supplying parts and a tape (hereinafter referred to as a component tape) in which the components are stored. A sprocket 34 that transmits the power to the component suction position 30A, a gear 36 that transmits power from the motor 32 to the sprocket 34, an I / F connector 38 that is electrically connected to the main body of the component mounter 10, and an electric feeder 30 And a control circuit board 50 for controlling the operation.

  The motor 32 is controlled by the control circuit board 50 to operate the sprocket 34 and to enter a power saving mode in a predetermined case.

  The sprocket 34 feeds the component tape at a constant pitch.

  The I / F connector 38 supplies power from the main body of the component mounter 10 so that data can be transmitted and received between the control circuit board 50 and the main body of the component mounter 10.

  As shown in FIG. 3, the electric feeder 30 is set on the electric feeder carriage 22 of the component mounter 10, and the tape reel 4 of the parts used by the electric feeder 30 is used. Is placed in a tape reel storage box 24 attached to each electric feeder 30 below the carriage 22.

  Further, the component tape 6 is wound up by the motor 32 and the sprocket 34 of the component tape feeding mechanism section 40, and the cover tape 6A of the component tape 6 is carried by the cover tape winding mechanism section 42 before the component suction position 30A. It is peeled off from 6B and wound up.

  Next, the internal configuration of the control circuit board 50 according to the embodiment of the present invention will be described with reference to FIG.

  The control circuit board 50 stores a control circuit 52 that controls the operation of the entire electric feeder 30 and a schedule (hereinafter referred to as a component mounting schedule) relating to an operation of supplying components in the electric feeder 30 itself. A shift register 54, a mounting presence / absence detection circuit 56 that is a means for determining whether or not to enter the power saving mode, a motor driver 58 that directly controls the motor 32, and a retry bit unit having a 1-bit register for retry bits 60, and an AND circuit 62 and an OR circuit 64 as logic circuits.

  The control circuit 52 also has an interface (I / F), is electrically connected to the component mounter 10 main body via the I / F connector 38, and mounts components from the control device 20 shown in FIG. The schedule is written in the shift register 54.

  In the shift register 54, as data indicating whether or not the motor 32 is to be rotated, for example, H component mounting data is stored in the order of component mounting schedule when rotating, and L component mounting data is stored when not rotating. Has been.

  As shown in FIG. 4, data for determining the current operation of the motor 32 is held in the first data of the component mounting data, and data for determining the next operation is held in the second data of the component mounting data. As described above, the component mounting data is sequentially held in the shift register 54.

  The mounting presence / absence detection circuit 56 determines whether or not the period during which the operation of supplying components from the electric feeder 30 itself is not scheduled is longer than a predetermined period, based on the component mounting schedule that progresses. ing. In the present embodiment, for example, the determination is made based on the first to fourth data of the component mounting data.

  The motor driver 58 controls the operation of the motor 32 based on the component mounting schedule of the shift register 54 and the output of the mounting presence / absence detection circuit 56.

  When a retry bit is set in the retry bit section 60 and the mounting of the component fails and the retry is necessary, the same component can be mounted again.

  The AND circuit 62 outputs based on the trigger signal from the component mounting machine 10 main body and the signal indicating the retry state from the retry bit unit 60, and the shift register 54 can be incremented based on this output. Yes. That is, it is possible to proceed with the component mounting schedule.

  The OR circuit 64 rotates the motor 32 not only by the H signal from the shift register 54 but also by the H signal indicating the retry state from the retry bit unit 60.

  Next, the operation of the present embodiment will be described based on the flowchart of FIG.

  After the production of the component mounting schedule is completed by the production program in the control device 20 of the component mounter 10 (production editing is completed), first, in step S1, the control device of the component mounter 10 is started before the start of mounting production. From 20, the parts mounting schedule data matching the production program is transferred to each electric feeder 30.

  When the component mounting schedule data is transferred to each electric feeder 30 and written in the shift register 54, in step S2, the motor 32 is turned on in each electric feeder 30 based on this component mounting schedule. Or a mode in which electric power is supplied so that the motor 32 can be immediately rotated by a trigger signal and the motor 32 is held) or a power saving mode (for example, a mode in which power supply is cut off). .

  Next, in step S3, mounting production is started and a trigger for driving the motors 32 to all the electric feeders 30 is output.

  Each electric feeder 30 receives this trigger signal, and when the first data of the component mounting data which is the head of the shift register 54 is H in step S4, the motor 32 rotates and starts supplying the components. To do. At this time, the suction position is finely adjusted and corrected according to the size and type of the component.

  Next, in step S5, it is determined whether or not supply of all components is completed, that is, whether or not component feeding is completed in all the electric feeders 30. For example, whether or not the tape feeder could be supplied without any trouble such as clogging. The electric feeder 30 itself has this function and repeats until it is completed.

  Next, in step S6, it is determined whether or not all component suction has been completed. That is, it is determined whether or not the parts have been properly sucked by the suction nozzle 12 shown in FIG.

  If all parts suction is completed, it is determined in step S7 whether or not all production has been completed. If not completed, the process returns to step S2, and the above steps S2 to S6 are repeated.

  If the suction is not completed in step S6, a retry bit is set in the retry bit unit 60 of the electric feeder 30 where the suction is not completed in step S8.

  In step S9, it is determined whether or not a predetermined number of retries has been exceeded, for example, 5 times. If not exceeded, the process returns to step S4, and component supply is started again. If the number of retries is exceeded, a retry error is displayed and the component supply is stopped.

  Hereinafter, based on the timing chart of FIG. 6, the operation of each electric feeder 30 according to the embodiment of the present invention will be described.

  FIG. 6 is a timing chart in the predetermined electric feeder 30.

  In FIG. 6, the upper diagram is the data in the shift register 54, the solid line represents H, and the broken line represents L. The “detection of presence / absence of mounting” in the middle stage is a determination result of the mounting presence / absence detection circuit 56 of FIG. 4, and when “L” continues four or more, the output is “0” indicating that no mounting is planned. The lower diagram shows the mode of the motor 32.

  First, the shift register 54 is incremented and shifted by a one-clock trigger that is simultaneously output from the main body of the component mounting machine 10 to all the electric feeders 30 in the above-described step S2. That is, the component mounting schedule advances, and the component mounting data in the shift register 54 shifts in the direction of the arrow in FIG.

  When the first data of the component mounting data at the head of the shift register 54 is H (solid line), the motor 32 is rotated by supplying power necessary for rotation, and when it is L (broken line), it is supplied by supplying power necessary for holding. Hold.

  As shown in FIG. 6, since the first data of the component mounting data is H at the first mounting timing, the motor 32 rotates and starts supplying components in step S4 until the first component is picked up. Electric power necessary for rotation is supplied to the motor 32.

  Next, at the timing of the second mounting, the second data of the component mounting data in FIG. 6 is pushed to the head of the shift register 54 in FIG. Since it is (broken line), the rotation of the motor 32 is stopped.

  At this time, when the bit in the predetermined depth direction of the shift register 54 (4 bits of component mounting data numbers 2 to 5 in the example in the figure) is L, a signal for setting the power saving mode from the mounting presence / absence detection circuit 56 is sent to the motor driver 58 And the power supply is cut off, and the motor 32 changes from the ON mode to the power saving mode. In the figure, L of component mounting data numbers 2 to 5 corresponds to a period when there is no plan to supply a component from the electric feeder 30 itself, and 4 bits in a predetermined depth direction are a predetermined period.

  After the mounting timing has elapsed four times after entering the power saving mode, the mounting presence detection circuit 56 changes the head of the shift register 54 (an arbitrary bit in the depth direction of 4 bits) to “1”. The power saving mode is continued until the motor 32 is in a state where the power supply is cut off.

  In the figure, when the sixth data H comes to the top of the shift register 54, the motor 32 rotates. The seventh data is L, but since the eighth data is H, even if the seventh data comes to the head of the shift register 54, the rotation of the motor 32 is stopped, but the power supply is not cut off. , It will be in the hold state.

  In addition, when a retry operation or fine adjustment of the component stop position in the cavity is necessary due to a component drop or a pickup error, a retry bit is set in the retry bit portion 60 of the electric feeder 30 and the motor 32 is rotated. The clock of the shift register 54 is stopped, the next component mounting data is not pushed, and the progress of the component mounting schedule is stopped. That is, as shown in FIG. 4, when the output of the retry bit unit 60 is H, a signal L is input to the AND circuit 62 because there is a NOT circuit at the input terminal of the AND circuit 62, and the trigger signal H is applied. The output of the AND circuit 62 is L, and the shift register 54 is not incremented.

  When the output of the retry bit unit 60 is H, the signal H is input to the OR circuit 64. Regardless of the output of the shift register 54, H is output from the OR circuit 64 to the motor driver 58, and the motor 32 rotates. To do.

  When the retry is completed, the retry bit is reset and the increment operation of the shift register 54 is resumed.

  The determination by the mounting presence / absence detection circuit 56 is made up of a plurality of bits, for example, 4 bits in this embodiment, but switching between the driving mode and the power saving mode is a short time, that is, the first component is selected. If it can be picked up and mounted and the second part can be picked up by the same electric feeder 30, the determination by the mounting presence / absence detection circuit 56 is configured with 1 bit as shown in FIG. For each piece of component mounting schedule data, the motor 32 may be driven with mounting data (H), and the motor 32 may be put into a power saving mode without mounting data (L). For example, if the response of the motor 32 is fast, switching between the drive mode and the power saving mode can be performed in a short time without any trouble in the mounting operation even if the supply of power is interrupted.

  Also, instead of the shift register, a FIFO (First-In First-Out) may be used, and the method for holding the data of the component mounting schedule is not limited. The component mounting schedule is advanced by pointing the address of the stored data with a pointer. May be.

  The present invention can also be applied to control of a motor such as a bulk feeder, and is not limited to a stepping motor as in the present invention, but may be a servo motor or a DC motor, and the present invention has versatility.

The top view which shows the component mounting machine of embodiment which concerns on this invention The perspective view which shows an electric feeder similarly Side view showing a state where the electric feeder is mounted on a component mounter The block diagram which shows the control part of the said electric feeder A flowchart showing an operation procedure of component mounting in the present embodiment Similarly, a timing chart showing the circuit operation of the electric feeder Timing chart showing a case where there is one bit for determination in the circuit operation

Explanation of symbols

10. Component mounter 30 ... Electric feeder (component feeder)
32 ... motor 54 ... shift register (storage means)
56... Presence / absence detection circuit (determination means)
58 ... Motor driver (control means)
60: Retry bit part

Claims (3)

In a component supply device equipped with a motor as a drive source for the operation of supplying a component, as well as being mounted on a component mounter that produces a mounting board according to a production program that controls the operation of component mounting,
Storage means for preliminarily storing a component mounting schedule of an operation of supplying a component in the component supply device itself based on the production program;
Determining means for determining whether or not a period during which the operation of supplying a component from the component supply device itself is not scheduled is greater than or equal to a predetermined period based on the progress of the component mounting schedule held in the storage unit;
Control means for causing the motor to enter a power saving mode when it is determined by the determination means that a period during which the operation is not scheduled is equal to or longer than a predetermined period;
A component supply device comprising:   The component supply apparatus according to claim 1, wherein the component mounting schedule is advanced in synchronization with a trigger signal from the component mounter.   The component supply apparatus according to claim 1, wherein the component mounting schedule is stopped by a signal indicating a retry state from the component mounter.

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