SMT processing needs to pay attention to two main points: 1 is the chip production capacity. 2. Patch quality problem
First, SMT chip processing capacity is related to the delivery time. 1. Machine factor: SMT SMT machine diversification, if it is second-hand or a long time, or domestic performance is low, if you receive a complex patch order to consider the delivery date, because these machines can not be high-speed patch, such as a piece of energy is 0201, you use the old Samsung CP45, or CP33, you will encounter a lot of trouble, all kinds of jump material, The nozzle can't identify the vital parts, and a whole bunch of other problems. It will affect the production capacity. If it is a relatively advanced new SMT machine, such as Panasonic high-speed printing machine, CM402 BM201\/203, these mounting capacity is very large, as long as the reasonable arrangement of production, it will not affect the delivery time. 2 Human factors, programming staff programming level, placement personnel, able to master materials, able to operate the machine independently, serious work, high skill level, why, I said these? For example, the printer is not familiar with printing, only check whether the PCB dry plate has solder paste, can not be debugger, such as scraper cleaning times steel mesh inspection, printing thickness, etc., if you do not pay attention to these details, there will be a lot of quality problems, such as false welding, air welding and other phenomena appear, the placement machine operator is not familiar with the material, or the refuging does not scan the code, the plate IC, The direction of BGA is reversed, the high rate of throwing material is not solved, the reflow temperature is not tested, etc. These will affect the overall patch level, batch production, and the problem of rework is troublesome. 3. Material problems, material procurement progress, material quality problems, etc. 4, environmental problems, SMT workshop temperature problems, humidity problems, anti-static problems, etc. 5 Rules and regulations.
Mainly refrigerant patch, green, leak proof can, in the past not Jin timely with copper sleeve, always keep the tube about 26C, after decades of improvement, should be good Jin and practical!