我觉得有一点chinglish。可以考虑改成:we have found 2 reasons accounting for this problem. One is the worn driving wheels, which cause the instability of the solder supply, and the other is nozzle issues.
首先,中文原文就是病句。然后,嗯,句子有语法问题,而且是中式英语。We found there were two accounts that would be charged for the problem: the unstable solder supply which is caused by the wear of delivery wheel, and the matter of suction nozzle.