COGNEX® Checker® 200 Series Reference □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ Checker 200 Series Products and Accessories Dimensions and Features Getting Started Working Distance and Field of View Adjusting Focus Changing Lenses Mounting Checker Checker User Interface Checker Part Triggers Part Finding Sensor Inspection Sensors Ladder Logic Ladder Logic Examples Job Control External Retrain Run Time Display Run Time Recording Filmstrip Control Input/Output Wiring Specifications Precautions
Checker 200 Series Products and Accessories Checker 201 • Part detection • Part inspection Lens Kit (CKR-200-LENSKIT) Set of 3.6mm, 8mm, and 16mm lenses that provide expanded field of view and working distance options. • Trigger input, 2 discrete outputs • Encoder input Checker 202 Checker 201 features plus support for ladder logic. Flying Lead Cable (CKR-200-CBL-001) Connects Checker 201/202 directly to your equipment (5m).
4 3 5 67 (2.64) 2 2 22 (0.87) 6 39 (1.54) 60 (2.36) 7 mm (in) 1 1 Mounting holes (M4 x 4 mm) 2 Focus lock (M3, use 2.5 mm hex key) 3 Lens cover/focus ring 4 Status LED (GREEN): 1 41 (1.61) 27.5+0.5 (1.08+0.
Minimum PC System Requirements Step 4: Verify Operation • Microsoft Windows 2000™ SP4, Windows XP™, or Windows Vista™ Start the Checker User Interface software (select Cognex‑>Checker 200 Series‑>Checker from the Windows Start menu), then perform the steps listed below to verify that Checker is functioning properly. ® ® • 128 MB RAM • USB 1.1 (2.0 recommended for best performance) • 1024 x 768 (96 DPI) or 1280 x 1024 (120 DPI) display Step 1: Install Checker User Interface Software 1.
8 7 6 5.8 mm 5 8 mm 4 3 16 mm 2 1 1 1 2 3 4 5 6 7 8 9 2 10 11 12 1 Closer 2 More distant 3 Focus lock 3 Working Distance (in) 3.6 mm 40 3.6 mm The9lens cover both seals the front of Checker and lets you adjust the lens 8 focus. 30 7 5.8 mm 20 8 mm 6 5.8 mm 5 5 4 3 10 16 mm 20 30 40 Working Distance (cm) 50 Lens is threaded into Checker housing. 5 Large O-ring seals lens cover to Checker housing. 6 Small O-ring rotates lens when lens cover is rotated.
1 To remove the Checker lens, follow the steps listed below. To install the Checker lens, follow the steps listed below. Note: Failure to follow these instructions can cause damage to your Checker. Note: Failure to follow these instructions can cause damage to your Checker. 1 Unscrew lens cover. Lens is secured to lens cover by small internal O-ring. 2 When lens is fully released, remove cover with lens in place. 3 Remove lens from lens cover.
Caution: Do not use a mounting screw with an exposed thread depth of greater than 5mm. Allowing the mounting screw to bottom in the mounting hole can damage Checker. The optional Checker mounting bracket lets you easily position and adjust Checker on your line. Mounting Checker at a slight angle can reduce reflections from your part’s surfaces, improving performance. Adjust the mounting angle to provide the clearest image of the part features you are checking.
The Checker User Interface is PC software that lets you control Checker. You use this program to view Checker images, create and modify Checker Jobs, and to monitor running Checkers. 1 2 3 4 6 10 8 5 1 Status pane. Shows which Checker is connected, the Job name and if it has been saved, along with results for the most recent image. 2 Checker steps. Click each button in turn to build a Checker application. 3 Image display. Shows live video from Checker or individual images from a Filmstrip.
Checker Part Triggers A part trigger tells Checker that a part is ready to be inspected. Checker supports three trigger types. APEX Choosing a Trigger Type In most cases, it is simplest to use the Internal Part Trigger, since no external equipment is required. Simply create a Part Finding Sensor in the Find My Part step. If the appearance of your parts is highly variable, or if your line already has a device or sensor that produces a part trigger signal, you can use an External Trigger.
Part Finding Sensor A Part Finding Sensor detects and locates your part in the image. You create a Part Finding Sensor by drawing a box around a feature of part that is present on both good and bad parts. Part Finding Sensors and Trigger Types Part Finding Sensors are used differently for different trigger types. • With an Internal Trigger, a Part Finding Sensor is required. The Part Finding Sensor tells Checker that a part is present. 1 2 • With an External Trigger, a Part Finding Sensor is optional.
Inspection Sensors Inspection Sensors evaluate part of a Checker image to determine if a feature is present or not. There are three types of inspection sensors: 1 Sensor Threshold The sensor threshold slider sets the level below which a sensor fails and above which a sensor passes. In many cases, the default value works well. If you adjust the slider, set it so that it is mid-way between the level for good parts and bad parts.
Ladder Logic Checker 202 only. Ladder logic lets you create new, customized inspection results in addition to the three Checker-defined results (Part Detect, All Pass, and Any Fail). You create new results using the logic editor controls.
Ladder Logic Examples Checker-defined Results User-defined Results The All Pass rung ANDs together the output of all Inspection Sensors. Only if all of the contacts are closed is the rung true. In this example, the rung is false because at least one sensor (Bright1) is false. To AND together the results of multiple sensors, create a contact for each sensor on a single rung. Only when all the sensors are true is the rung true. The Any Fail rung assigns the built-in All Pass rung to an inverted contact.
Job Control Requires the I/O Module. Checker has 16 Job slots. You can assign saved Checker Jobs to Job slots, then load them while Checker is running by sending Job Select and Job Change signals to Checker through the I/O Module.
External Retrain Requires the I/O Module. You can configure both Part Finding Sensors and Pattern Sensors to be retrainable by checking External Retrain in the sensor control panel. This example shows Part Finding Sensor being retrained: 1 − ENCODER PHB+ ENCODER PHA− ENCODER PHA+ INPUT 7 2 INPUT 6 3 INPUT 5 INPUT 4 COMM OK INPUT 3 INPUT 2 MODULE OK TRIGGER OUT 7 OUT 6 OUT 5 4 OUT 4 OUT 3 OUT 2 HS OUT 1 HS OUT 0 I/O COMMON 1 Part finding sensor detects part normally.
Run Time Display Run Time Recording Run Time Display lets you control what images, if any, are displayed by Checker in Run mode. Run Time Recording lets Checker record and save specific images while it is running, even when not connected to a PC. You can choose from among any of the current Checker results, including those that you define with the ladder logic. The Display: menu lets you pick which images to display in Run mode.
Filmstrip Control The Filmstrip Control lets you record and play back Checker images. 1 2 5 3 6 4 7 1 Filmstrip mode selector 2 Record button. Click (or press F5) to add an image to the Filmstrip. 3 Recording rate. How many images per second are added to the Filmstrip. 4 Filmstrip display. Click on an image to view it. Orange bars separate images of a single detected part (in Internal Part Trigger mode). 5 Playback button (only enabled in Playback mode). Press to start or stop image playback.
Trigger Checker from a Sensor (Checker sources current) Lead Color Signal Checker leads are color-coded as shown in this table. RED 24 VDC + BLACK 24 VDC – All input and output devices must either source or sink current. To have Checker source current, attach DC+ (RED) to I/O COMMON (GREEN). To have Checker sink current, connect DC- (BLACK) to I/O COMMON (GREEN).
Encoder Wiring The I/O Module exposes all Checker I/O lines, and it adds Job Control and External Retrain input lines, one general-purpose input line, and six additional general-purpose output lines. PHB– (VIOLET/WHITE) B– A– + 5-24 VDC Differential PHA– (BROWN/WHITE) + PHB+ (VIOLET) B+ – 24 VDC power – PHA+ (BROWN) A+ DC– (BLACK) + Encoder inputs − 4.
Cable 24AWG, 5 m, M12 connector (power and I/O) Power requirements Voltage: +24 VDC (22-26 VDC) Current: 250 mA max (500 mA max with I/O Module) Discrete Inputs Input ON: > 10 VDC (> 6 mA) Input OFF: < 2 VDC (< 1.5 mA) Protection: Opto-isolated, polarity-independent Note: All input and output devices must be current source or current sink.
