Dispensing machine leak adhesive is possible because the glue viscosity too low and cause, because the viscosity of the glue is too low in the dispensing valve part of the circulation speed is very fast, if the rubber valve closing speed is too slow because you will flow as a result of rapid glue glue dispensing machine leakage, so the best equipped with dispensing valve with a suction valve. When the system detects LED ground dispenser leakage, suction valve will produce a strong suction, the leakage of adhesive part all the way back to the dispensing machine, will not produce leakage problem By replacing the dispensing needle with good sealing ability, the glue leakage problem of LED floor type dispensing machine can be solved. Because some large dispensing needle prone to leak glue, so choose the right needle to maximize the leakage to avoid the problem, of course, this is generally in the debugging link to do a good job.