Standardize the nine-point needle detector sensitivity test method: (nine-point test method)
1, prepare standardized test cards and test card holders (depending on the height of the needle machine mechanical gantry (probe), select the appropriate test card; 2, prepare to wipe the needle machine mechanical strip (towel optimal);
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; For already used needle detection machines, a long cloth (towel) is moistened with water and wringed to adjust the sensitivity to the lowest level , Start the machine and let it run with a long brace. Hold the conveyor belt at will, wipe the dirt on the front of the conveyor belt, and let the conveyor belt run for a few times until the conveyor belt is free of dirt (if the conveyor is particularly dirty, you can change the length Wipe the cloth repeatedly after cleaning or wipe it with industrial alcohol or anti-static belt cleaner.) Then stop the machine, wash the long cloth clean and wring it dry, try to pass the long cloth under the conveyor belt (reverse side), grasp the conveyor belt in two sections with both hands, and start the machine to run to wipe the dirt on the reverse side of the conveyor belt.
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Top of the list: After cleaning, use the nine-point test method to check the mechanical sensitivity of the needle, first use the standard test card directly on the conveyor belt Turn on the needle detector, the needle detector can detect the test card to announce the alarm and the shutdown is normal. (It is necessary to place the detection card on the surface of the conveyor belt to pass three points for inspection-conveyor belt A {{{{5} }}}, A 2, A 3 orientation)
Second: Next, insert the standard test card into the center of the test card holder (you can also find no metal replacement), put the rack with the standard test card on the conveyor belt of the needle detector in operation, the needle detector can detect this The test card announces the alarm and the shutdown is normal. (The test card needs to be placed on the surface of the conveyor belt to pass three points for inspection-conveyor belt A 4, A 5, A 6 Azimuth)
Third: Next, insert the standard test card into the highest point of the test card holder, and put the rack embedded in the standard test card on the conveyor belt of the needle detector in operation. The needle detector can detect that the test card announces an alarm and shuts down to Normal (need to place the detection card on the surface of the conveyor belt and pass three points to check-the conveyor belt A 7, A 8, A 9)
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; If the test card can be detected by the three test methods above, and the alarm is shut down, the needle detection machine can be used normally. (The sensitivity of the needle detector is the diameter of the standard test card used. Currently, the diameter is 0. 8, {{5}}. 0, {{5}}. {8}}, {{{{1010}}}. 5, 2. 0MM iron ball test card. The actual needle sensitivity depends on the type of test card, depending on the specific The products to be inspected and the height of the channels for export to the world and the needle inspection machinery have never been decided). The sensitivity detection of the above needle detector needs to be conducted every three hours, and the results of the verification shall be recorded in writing for customer inspection.
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; If the nine-point test method is used to verify that the sensitivity does not meet the customer ’s requirements, the sensitivity of the needle detector can be increased. If the sensitivity of the needle detector is increased, it still cannot meet the customer's requirements, and it is recommended to contact the supplier to deal with or replace the machine.