JP5415917B2 - Cutting equipment - Google Patents

Description

  The present invention relates to a cutting means provided with a replaceable rotating annular blade, and a wear / breakage detecting means for detecting breakage of the annular blade provided with a light emitting end face and a light receiving end face opposed to each other at an interval. The present invention relates to a cutting apparatus including:

  A cutting device for cutting a workpiece such as a semiconductor wafer includes an annular blade having a cutting means having a replaceable rotating annular blade, and a light emitting end face and a light receiving end face opposed to each other at an interval. Wear / breakage detecting means for detecting breakage of the laser, an operating position where the outer peripheral edge of the annular blade is partially located between the light emitting end face and the light receiving end face, and the light emitting end face and the light receiving end face. And a moving means for selectively positioning the annular blade at a non-operating position where the annular blade is spaced from each other, and a management means for managing the wear / breakage detecting means and the moving means. The light emitting end face and the light receiving end face of the wear / breakage detecting means are arranged such that the relative position with respect to the outer peripheral edge of the annular blade can be adjusted in a state where the wear / breakage detecting means is located at the working position (Patent Document). 1).

  The wear / breakage detecting means has the light emitting end face and the light receiving end face positioned so as to sandwich the outer peripheral edge of the annular blade, and when actually detecting breakage during cutting, the annular blade is rotating at a predetermined speed. The breakage of the annular blade is detected by the change in the amount of light received from the light emitting means. Specifically, when the light receiving means of the wear / breakage detecting means is replaced with a new annular blade, the light receiving amount within the adjustment range (for example, 5% when the state where there is no obstruction by the annular blade is 100%). The position of the light emitting end face and the light receiving end face of the wear / breakage detecting means is adjusted by the operator so that the light is received at a light receiving amount of% to 10%. When the cutting operation is started, the rotation of the annular blade is started and the amount of light received by the wear / breakage detection means is monitored by the management means. When cutting is continued, the annular blade is worn, and at the same time, the amount of light received by the wear / breakage detecting means increases. When the amount of received light exceeds the detection allowable range (for example, the detection allowable range of 20% or less), the detection capability of the wear / breakage detection means becomes unstable. Is interrupted. The operator re-adjusts the positions of the light emitting end face and the light receiving end face of the wear / breakage detecting means by the adjusting means so that the received light amount falls within the adjustment range, and the cutting is resumed. That is, stable wear / breakage detection can be performed within the allowable detection range.

  When breakage occurs during cutting, the amount of received light increases locally. When the management means detects such increase in the amount of received light, a detection allowable range error signal is output and the cutting operation is interrupted. The broken annular blade is replaced with a new annular blade. As described above, when the annular blade with a certain degree of wear is replaced with a new one, the light emitting end face of the light emitting means of the wear / breakage detecting means and the position of the light receiving end face of the light receiving means must be shifted from their proper positions. There are many. Therefore, every time the blade is replaced with a new annular blade, the operator needs to adjust the positions of the light emitting end face and the light receiving end face of the wear / breakage detecting means so that the amount of received light is within the adjustment range.

JP 2008-285342 A

  However, when replacing the annular blade, an operator may forget to adjust the light emitting end surface and the light receiving end surface of the wear / breakage detecting means to appropriate positions and start the cutting operation. In that case, the cutting operation is started with the position of the light emitting end face and the light receiving end face of the wear / breakage detection means being inappropriate, and the wear / breakage is detected as soon as the breakage detection function of the wear / breakage detection means is started. A detection tolerance error of the detection means occurs, and the cutting operation is interrupted. Therefore, a cutting preparation process such as a cutting line detection operation for cutting is wasted, and the adjustment of the wear / breakage detecting means and the cutting preparation process are repeated again, resulting in a decrease in efficiency.

  The present invention has been made in view of the above-mentioned facts, and its main technical problem is that when the adjustment of the blade wear / breakage detection means, which is essential when the annular blade is replaced, is forgotten, a warning to that effect is given. It is another object of the present invention to provide a new and improved cutting apparatus capable of preventing the start of cutting operation.

According to the present invention, as a cutting device that achieves the above technical problem, cutting means comprising a replaceable rotating annular blade,
A wear / breakage detecting means for detecting wear and breakage of the annular blade, having a light emitting end face and a light receiving end face opposed to each other at an interval;
The wear / breakage detecting means includes a working position where the outer peripheral edge of the annular blade is partially located between the light emitting end face and the light receiving end face, and a non-perpendicular position that allows the annular blade to be replaced. A moving means for selectively positioning the operating position;
Management means for managing the wear / breakage detecting means and the moving means;
Adjusting means for adjusting the light emitting end face and the light receiving end face of the wear / breakage detecting means to an appropriate position with respect to the outer peripheral edge of the annular blade;
In a cutting device including
An annular blade replacement completion input means is provided for transmitting a blade replacement completion signal to the management means when the annular blade is replaced.
The management means, after receiving the blade replacement completion signal, determines whether or not the wear / breakage detecting means is positioned at the operating position, and the wear / breakage detecting means is positioned at the operating position. In this case, it is determined whether the amount of light received by the light receiving end face of the wear / breakage detecting means is within the adjustment range. If the amount of light is less than the adjustment range or exceeds the adjustment range, the adjustment is performed. Generating an adjustment range error signal for urging the position adjustment of the wear / breakage detection means by the means, and allowing the cutting device to start cutting operation when the received light amount is within the adjustment range;
A cutting device is provided.

Prior to determining whether the wear / breakage detecting means is positioned at the operating position,
When the management means receives the blade replacement completion signal, the management means determines whether or not the wear / breakage detection means is positioned at the non-operation position, and the wear / breakage detection means is positioned at the non-action position. In this case, it is determined whether or not the amount of light received by the light receiving end surface of the breakage detecting means is greater than or equal to a predetermined value that is greater than the adjustment range. It is preferable to generate a predetermined value error for prompting the function recovery operation of the breakage detection means.

  In the cutting apparatus according to the present invention, when adjustment of the blade wear / breakage detecting means that is essential when the annular blade is replaced is not performed, a warning to that effect is made and the start of the cutting operation is prevented. Can do.

The principal part perspective view of the cutting device comprised by this invention. (A) Schematic which shows the state in which the abrasion / breakage detection means of the cutting means was located in the action position. (B) Schematic which shows the state in which the abrasion / breakage detection means of the cutting means was located in the non-operation position. Schematic which shows a wear and damage detection means. The schematic model which shows the outer peripheral part of a damage detection part. Schematic which shows the blade exchange screen displayed on the operation panel. Schematic which shows the abrasion and breakage detection means adjustment screen displayed on the operation panel. The schematic flowchart which shows the time of an abrasion / breakage detection means adjustment operation | work.

  Hereinafter, preferred embodiments of the cutting apparatus of the present invention will be described in more detail with reference to the accompanying drawings.

  FIG. 1 shows a preferred embodiment of a cutting apparatus constructed according to the present invention. The cutting apparatus indicated by the whole number 2 has a replaceable rotary annular blade 4, a cutting means 8, and a holding table 9 for placing a workpiece (not shown). The holding table 9 is disposed below the cutting means 8 so as to be movable in the X-axis direction in FIG. 1, and includes a holding mechanism (not shown) for sucking and holding a workpiece on the upper surface.

  The cutting means 8 is arranged so as to be movable in the Y-axis direction and the Z-axis direction in FIG. The cutting means 8 includes a housing 10 and a spindle (not shown) rotatably disposed in the housing 10, and an annular blade 4 is attached to the tip of the spindle. The structure of the entire cutting apparatus and the method of attaching the annular blade 4 to the tip of the spindle may be the well-known structure and method described in, for example, Japanese Patent Laid-Open No. 11-33907, and will not be described in detail in this specification. A blade cover 6 is attached to the front end of the housing 10. The blade cover 6 includes a fixing member 12 that fixes the blade cover 6 to the front end of the housing 10, a fixing cover member 14 that is fixed to the fixing member 12, a moving means 16 that is disposed above the fixing member 12, The movable cover member 18 is mounted on the moving means 16.

  Continuing the description with reference to FIG. 2, the moving means 16 is composed of an air cylinder, the cylinder portion 17 is composed of non-magnetic resin, and the rod 20 that moves forward and backward in the horizontal direction, and the rod 20 moves forward and backward. And an air supply unit 21 (shown in FIG. 1) for supplying compressed air for the purpose. A connecting portion 22 constituting the movable cover member 18 is fixed to one end (right end in FIG. 2) of the rod 20, and the movable cover member 18 is also moved in the horizontal direction as the rod 20 moves forward and backward. Are selectively positioned in the closed position shown in FIG. 2a and the open position shown in FIG. 2b. A cutting nozzle 13 is fixed to the lower end of the movable cover member 18. Further, a light emitting end surface and a light receiving end surface, which will be described later, of the wear / breakage detecting means 24 are fixed to the mounting portion 19 mounted on the movable cover member 18 so as to protrude downward. The cutting nozzle 13 supplies cutting water toward the annular blade 4, cools the annular blade 4 during cutting, and discharges cutting waste.

  As shown in detail in FIG. 3, the wear / breakage detecting means 24 disposed on the movable cover member 18 includes a fixed block 26 fixed to the movable cover member 18 and a fixed block 26 in FIG. A moving block 28 that can be moved up and down, an adjusting means 30 that moves the moving block 28 and adjusts the relative positions of the light emitting end surface and the light receiving end surface, which will be described later, with respect to the outer peripheral edge of the annular blade 4; And a fixing screw 27 which is stationary at the position. A male screw rod 30b having an enlarged head 30a at the tip is rotatably attached to the fixed block 26, and the male screw rod 30b is screwed into a female screw (not shown) formed on the moving block 28. When the enlarged head 30a is rotated, the moving block 28 moves up and down with respect to the fixed block 26 according to the rotation direction. The fixing screw 27 is screwed into a female screw hole (not shown) formed through the fixing block 26 and comes into contact with the side surface of the moving block 28 to make the moving block 28 stationary at a predetermined position.

  A light emitting means 32 and a light receiving means 42 are disposed opposite to the wear / breakage detecting means 24 at a further interval. The light emitting means 32 of the wear / breakage detecting means 24 includes a light emitting element 34 composed of a light emitting diode or a laser diode, an optical fiber 36 connected to the light emitting element 34, and an optical fiber 36 attached to the moving block 28. A right-angle prism 38 that reflects light and a transparent protective plate 40 that is formed of sapphire and attached to the right-angle prism 38 are configured. The surface of the transparent protective plate 40 constitutes the light emitting end face 40 a of the light emitting means 32. The light receiving means 42 of the wear / breakage detecting means 24 includes a light receiving element 44 such as a photodiode, an optical fiber 46 connected to the light receiving element 44, a right angle prism 48 attached to the moving block 28, and a right angle prism 48. And a transparent protective plate 50 made of sapphire or the like attached to the substrate. The surface of the transparent protective plate 50 constitutes the light receiving end face 50 a of the light receiving means 42. The light emitting end face 40a and the light receiving end face 50a are arranged to face each other.

  Returning to FIG. 2 and continuing the explanation, when the movable cover member 18 is positioned at the closed position shown in FIG. 2A, the wear / breakage detecting means 24 receives the light emitting end surface 40 a of the light emitting means 32 and the light receiving end. The outer peripheral edge 4a of the annular blade 4 is positioned at a working position where it is partially located between the light receiving end face 50a of the means 42. When the movable cover member 18 is positioned at the open position illustrated in FIG. 2B, the wear / breakage detecting means 24 is positioned at the non-operating position separated from the annular blade 4. When the wear / breakage detecting means 24 is positioned at the non-operating position, the cutting nozzle 13 mounted on the movable cover member 18 is also separated from the annular blade 4, so that replacement of the annular blade 4 is allowed.

  Further, as shown in FIG. 2, the cutting device 2 includes a detection sensor 52 that detects the advance / retreat of the rod 20 of the moving means 16, and an operation panel 54 for inputting various settings of the cutting device 2 and displaying various states. And a managing means 56 for managing the moving means 16 and the wear / damage detecting means 24. The management means 56 also controls the entire cutting device 2. A detected piece 58 made of a permanent magnet is attached to the other end (left end in FIG. 2) of the rod 20 of the moving means 16. The detection sensor 52 is a proximity sensor disposed in the moving means 16 and detects the proximity to the detected piece 58 in a state where the wear / breakage detection means 24 is positioned at the operating position. As shown in FIG. 2A, when the wear / breakage detecting means 24 is positioned at the operating position, the detection sensor 52 detects the magnetic force of the detected piece 58 and transmits an operating position signal to the managing means 56 for management. The means 56 determines that the wear / breakage detecting means 24 is positioned at the operating position. When the wear / breakage detection means 24 is positioned at the non-acting position shown in FIG. 2B, the detection sensor 52 does not detect the magnetic force of the detected piece 58, and therefore transmits the action position signal to the management means 56. First, the management means 56 determines that the wear / breakage detection means 24 is positioned at the non-operation position.

  Detection of wear and breakage of the annular blade 4 by the wear / breakage detection means 24 will be described. When the wear / breakage detecting means 24 is positioned at the above-mentioned non-acting position (FIG. 2B), as shown in FIG. 4A, the area of light emitted from the light emitting end face 40a of the light emitting means 32 Is A, the light A is not blocked by the annular blade 4, and the amount of light received by the light receiving end face 50a at this time is 100%. 4B, the light emitting end surface 40a and the light receiving end surface 50a are formed on the annular blade 4 at appropriate positions immediately after adjustment when the wear / breakage detecting means 24 is positioned at the operating position (FIG. 2A). The positioned state is shown. The light A irradiated from the light emitting end face 40a is partially blocked by the outer peripheral edge 4a of the annular blade 4, and the amount of light received by the light receiving end face 50a is, for example, 5% within the adjustment range.

  When the tip of the annular blade 4 is gradually consumed in normal cutting and the width W is consumed in FIG. 4 and the outer peripheral edge becomes 4a ', the amount of light received by the light receiving end face 50a increases to, for example, 20%. When the detection allowable range is set to 20% or less, for example, when the annular blade 4 is further consumed, the detection capability becomes unstable when the amount of received light exceeds the detection allowable range 20%. Generates a detection tolerance error signal and stops the cutting operation. Thereafter, the operator manually operates the adjusting means 30 to move the light emitting end face 40a and the light receiving end face 50a of the wear / breakage detecting means 24 downward in FIG. 3, thereby setting the light receiving amount of the light receiving end face 50a to a value within the adjustment range. To do. Therefore, when the old blade with advanced wear is changed to the new annular blade 4, the position of the light A is often not appropriate if the wear / adjustment detection means is not adjusted. Cutting is started in this state, and a detection allowable range error is output at the moment when detection by the wear / breakage detection means 24 is started.

  Further, when the annular blade 4 is broken during cutting, the amount of received light locally increases. When a sudden increase in the amount of received light is detected, the management unit 56 generates a detection allowable range error signal and outputs a detection allowable range error. At that time, it is replaced with a new annular blade 4. As described above, when the annular blade 4 is replaced, the adjusting means 30 adjusts the positions of the light emitting end surface 40a and the light receiving end surface 50a so that the amount of light received by the light receiving end surface 50a falls within the adjustment range.

  The operation panel 54 is disposed in a place where the operator or the like is easy to see and operate in the casing of the cutting apparatus 2. Under the control of the management means 56, the operation panel 54 displays various information associated with the amount of light received at the light receiving end face 50a of the blade wear / breakage detection means 24, processing, etc., and blade information when the annular blade 4 is replaced. These are composed of a touch panel for displaying an operation screen for displaying a button display for inputting various information. When replacing the annular blade 4, as shown in FIG. 5, a blade replacement screen 60 is displayed on the operation panel 54, and the type, blade thickness, and blade tip of the annular blade 4 mounted on the cutting device 2 are displayed. Blade information such as quantity is displayed. The blade replacement screen 60 is also provided with an annular blade replacement completion input means 62 for inputting a blade replacement completion signal to the management means 56 when the blade replacement is completed. When the operator presses the annular blade replacement completion input unit 62 displayed on the operation panel 54, a blade replacement completion signal is transmitted to the management unit 56. The management means 56 that has received the blade replacement completion signal causes the operation panel 54 to display a wear / breakage detection means adjustment screen 64 shown in FIG.

  The wear / breakage detecting means adjustment screen 64 adjusts the positions of the light emitting end face 40a of the light emitting means 32 and the light receiving end face 50a of the light receiving means 42 of the wear / breakage detecting means 24 as shown in FIG. It is a screen for adjusting to an appropriate position with respect to the outer periphery 4a. The wear / breakage detection means adjustment screen 64 is a light reception level display section 66 that visually displays the received light amount received by the light receiving means 42 of the wear / breakage detection means 24 as a bar graph, and a light reception that displays the received light quantity numerically. An amount display unit 68 is included, and the received light amount is displayed in real time. Further, an input button 70 displayed beside the received light amount display section 68 indicating the received light amount opens and closes the movable cover member 18 of the blade cover 6 to selectively select the wear / breakage detecting means 24 at the operating position and the non-operating position. It is an input means for moving to. The input button 70 is displayed to indicate the current open / closed state of the movable cover member 18 of the blade cover 6. In the open state, the wear / breakage detecting means 24 is positioned in the non-operating position, and in the closed state, the wear / breakage is detected. The detection means 24 is positioned at the operating position.

  In addition, the wear / breakage detection means adjustment screen 64 has the wear / breakage detection means 24 positioned at the operating position (closed column 71b in FIG. 6) and the non-actuated position (open column 71a in FIG. 6). A movable state display unit 71 indicating the movable state is displayed. If the management means 56 determines that the light receiving end face 50a is received at a non-operating position at a predetermined value or more and a light receiving amount within the adjustment range at the operating position, “OK” is displayed. Furthermore, a preparation completion input means 72 is provided for inputting to the management means 56 that the wear / breakage detection means 24 has been adjusted to an appropriate position. When the operator performs all adjustment operations of the wear / breakage detection means 24 and displays “OK” in both the close column 71b and the open column 71a and presses the preparation completion input unit 72 on the wear / breakage detection unit adjustment screen 64, A preparation completion signal is transmitted to the management means 56. The management means 56 that has received the preparation completion signal displays a machining preparation screen (not shown) from the wear / breakage detection means adjustment screen 64 and can perform machining preparation and cutting of the workpiece. . If the operator presses the preparation completion input means 72 during the adjustment of the wear / breakage detection means 24, that is, when “NG” is displayed on the movable state display portion 71, the wear / breakage detection means. An error message prompting adjustment is displayed without shifting from the adjustment screen 64 to the processing preparation screen, and it is not possible to shift to processing preparation.

  In the cutting device 2 having the above-described configuration, an operation when the cutting device 2 is replaced with a new annular blade 4 will be described with reference to a flowchart of FIG. First, the wear / breakage detecting means 24 is positioned at the non-actuated position (open state), and the blade replacement screen 60 shown in FIG. It is removed and a new annular blade 4 is attached to the tip of the spindle. When the replacement operation is completed, the operator presses the blade replacement completion input unit 62 on the blade replacement screen 60 and transmits a blade replacement completion signal to the management unit 56. When the management means 56 receives the replacement completion signal (S1), the wear / breakage detection means adjustment screen 64 is displayed on the operation panel 54 (S2). Next, the management means 56 checks whether or not the breakage detection means 24 is positioned at the non-acting position (S3), and if it is positioned at the operating position, opens the movable cover member 18 of the blade cover 6. A warning to that effect is issued (S3 ′).

  Subsequently, as a premise for adjusting the light emitting end faces 40a and 50a of the wear / breakage detecting means 24, which is the main technical feature of the present invention, a function for confirming whether the wear / breakage detecting means 24 is functioning normally. Adjustment work is performed (S4 to S6). If the wear / breakage detection means 24 is positioned at the non-acting position in S3, the management means 56 determines whether or not the amount of received light is greater than or equal to a predetermined value (S4) and is less than the predetermined value. In this case, a predetermined value error signal is generated and a predetermined value error is output to the operation panel 54 (S5). The predetermined value is set to 90% or more, for example, assuming that the amount of light received is 100% when the annular blade 4 is not blocked. The purpose of setting the predetermined value or more is to inspect whether the light emitting means 32 and the light receiving means 42 of the wear / breakage detecting means 24 are functioning without any problem. When the predetermined value error is output, the function recovery operation of the wear / breakage detecting means 24 is performed by the operator or the like (S6).

  In the function recovery operation, the operator confirms the light emitting end face 40a and the light receiving end face 50a of the breakage detecting means 24, and if the light emitting end face 40a and the light receiving end face 50a are contaminated or the like, it is removed. This is an operation to restore 24 functions. Since the wear / breakage detecting means 24 is used in a state where the cutting blade and cutting chips are scattered during the cutting of the annular blade 4, dirt adheres to the light emitting end face 40a and the light receiving end face 50a of the light emitting means 32 and the light receiving means 42. Therefore, even in a state separated from the annular blade 4, light is not sufficiently emitted or received, and the amount of received light becomes less than a predetermined value (for example, 90%). On the wear / breakage detection means adjustment screen 64 (see FIG. 6), the received light amount is displayed on the received light level display unit 66 and the received light amount display unit 68 in real time. When dirt such as contamination is removed from the light emitting end face 40a and the light receiving end face 50a by the operator, the amount of received light is restored to a predetermined value (for example, 90%) or more.

  Returning to S4, after confirming that the amount of received light has recovered to a predetermined value or more, the management unit 56 changes the display in the open column 71a of the movable state display unit 71 from “NG” to “OK”. Thereafter, when the input button 70 on the screen 64 is pressed by the operator, the management means 56 moves the wear / breakage detection means 24 to the operating position (closed state) (S7). Here, when the operator presses the input button 70 while the open column 71a of the movable state display portion 71 is displayed, a predetermined value error is output, and it is not possible to proceed to the next step. .

  Subsequently, the adjustment of the light emitting end faces 40a and 50a of the wear / breakage detecting means 24, which is the main technical feature of the present invention, is performed (S9 to S11). The management means 56 determines whether or not the wear / breakage detection means 24 is positioned at the operating position. If the wear / breakage detection means 24 is positioned at the non-action position, the movable cover of the blade cover 6 is determined. A warning is given to close the member 18 (S8 '). If the wear / breakage detection means 24 is positioned at the operating position, the amount of light received by the light receiving means 42 of the wear / breakage detection means 24 is determined (S9). It is determined whether the amount of received light is less than the adjustment range or over the adjustment range (S9). If the light reception amount is less than the adjustment range or over the adjustment range, wear / breakage is caused by using the adjustment means 30 shown in FIG. An adjustment range error signal for prompting adjustment of the detection means 24 is generated (S10). In the present embodiment, the adjustment range is a received light amount of 5% to 10% as described above. For example, when it is less than the adjustment range, the positions of the light emitting end surface 40a and the light receiving end surface 50a of the wear / breakage detecting means 24 are moved too far inward in the radial direction of the annular blade 4, so The position of the end face 50a is moved to the outer edge in the radial direction and adjusted so that the amount of received light falls within the adjustment range. As described above, the operator performs the adjustment work of the wear / breakage detection means 24 using the adjustment means 30 (S11).

  Next, returning to step S9, when the management means 56 determines that the amount of received light is within the adjustment range (S9), the closing column 71b of the movable state display section 71 of the wear / breakage detection means adjustment screen 64 is set to “NG”. Change from “OK” to “OK”. If the operator presses the preparation completion input means 72 on the wear / breakage detection means adjustment screen 64 after all the indications on the movable state display section 71 are “OK”, a preparation completion signal is transmitted to the management means 56. (S12). The management means 56 that has received the preparation completion signal causes the operation panel 54 to display a machining preparation screen (not shown) from the wear / breakage detection means adjustment screen 64. Therefore, the operator can perform machining preparation and workpiece cutting. If the operator presses the input button 70 during the adjustment of the wear / breakage detection means 24, that is, when “NG” is displayed in the close column 71 b of the movable state display unit 71. An adjustment range error is output and no ready signal is generated. Accordingly, the machining operation cannot be started because the wear / breakage detection means adjustment screen 64 cannot be detached.

2 Cutting device 4 Annular blade 6 Blade cover 16 Moving means 24 Wear / breakage detecting means 30 Adjusting means 32 Light emitting means 42 Light receiving means 40a Light emitting end face 50a Light receiving end face 52 Detection sensor 54 Operation panel 56 Management means 60 Blade replacement screen 62 Blade replacement completion Input means 64 Wear / breakage detection means adjustment screen 71 Movable state display section 72 Preparation completion input means

Claims (2)

A cutting means with a replaceable rotating annular blade;
A wear / breakage detecting means for detecting wear and breakage of the annular blade, having a light emitting end face and a light receiving end face opposed to each other at an interval;
The wear / breakage detecting means includes a working position where the outer peripheral edge of the annular blade is partially located between the light emitting end face and the light receiving end face, and a non-perpendicular position that allows the annular blade to be replaced. A moving means for selectively positioning the operating position;
Management means for managing the wear / breakage detecting means and the moving means;
Adjusting means for adjusting the light emitting end face and the light receiving end face of the wear / breakage detecting means to an appropriate position with respect to the outer peripheral edge of the annular blade;
In a cutting device including
An annular blade replacement completion input means is provided for transmitting a blade replacement completion signal to the management means when the annular blade is replaced.
The management means, after receiving the blade replacement completion signal, determines whether or not the wear / breakage detecting means is positioned at the operating position, and the wear / breakage detecting means is positioned at the operating position. In this case, it is determined whether the amount of light received by the light receiving end face of the wear / breakage detecting means is within the adjustment range. If the amount of light is less than the adjustment range or exceeds the adjustment range, the adjustment is performed. Generating an adjustment range error signal for urging the position adjustment of the wear / breakage detection means by the means, and allowing the cutting device to start cutting operation when the received light amount is within the adjustment range;
The cutting device characterized by the above. Prior to determining whether the wear / breakage detecting means is positioned at the operating position,
When the management means receives the blade replacement completion signal, the management means determines whether or not the wear / breakage detection means is positioned at the non-operation position, and the wear / breakage detection means is positioned at the non-action position. In this case, it is determined whether or not the amount of light received by the light receiving end surface of the breakage detecting means is greater than or equal to a predetermined value that is greater than the adjustment range. Generating a predetermined value error for encouraging the function recovery work of the damage detection means;
The cutting device according to claim 1.

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