Rewinder fault handling
First, a full open toilet paper production and processing equipment of photoelectric protection function failure, after emergency treatment of the machine can still work, but because there is no protection detection, the operator is very worried about personal safety, resulting in low efficiency.
Second, remove the circuit board, visual inspection, found that the power bridge around the base plate discoloration, concluded that the bridge pile has burned out, replaced the bridge pile power test, still no response. With the multimeter measurement, the new bridge pile has been burned out, so it is judged that there is a short circuit. From the bridge stack down one by one to check the components, found a three terminal stabilizer block (7805) was broken, buy components to replace, after power on the circuit board power indicator light. The operator installed the circuit board on the machine and operated according to the normal procedure to check whether the photoelectric protection function works. He covered the light eye with his hand. The falling knife stopped immediately and tried several times.