摘要 |
When a component mounting process by mounting heads is executed on substrates which are positioned alternately by two substrate carrying lines, a determination is made on whether or not a mounting turn can be completed every time the mounting heads perform the mounting turn, and when it is determined that one of the mounting turns performed by the mounting head cannot be completed, a component mounting process is executed on the substrate which is positioned by the substrate carrying line which is opposite to the substrate carrying line.
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