I suspect there is a deviation in the draw nozzlechip time, and then when welding vacuum leak, resulting in a tin material is attracted...
怀疑吸嘴在吸取芯片的时候存在偏差，然后在焊接的时候真空漏气，最终导致了锡料被吸到芯片表面。
2
Make sure the converted cartridge is in good condition and can be use normally. Don't touch the chip and nozzle in the process of modification.
要保证改装的墨盒完好，可以正常使用，改装过程中严禁用手触摸芯片和喷头。
3
The overflow tank level and the speed of both the role of Chip can be changed by changing the factors such as the nozzle inlet pressure, drill gage width, nozzle diameter of the PDC bit.