Two modifiers for KingshengPCBA - China PCBA Supplier

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Assembly holder modifier and standard process modifiers

Assembly holder modifier for kingshengPCBA. This modifier represents the load/unload time for each machine-based process step. It is highly dependent on the machine setup procedures and the type of work holder to be used. In Kingsheng PCB assembly, this modifier represents the allocation to the number of PCBs that can be processed in a single work holder at different process steps. In some cases, this holder can be the solder frame, while in other cases the PCB panel can be considered as the carrier. These modifiers are in effect only at those operations where positioning for loading and unloading is required.

Standard process modifiers. These are standard process steps that every PCB goes through without any special attention to the type of material or function of the board. They include universal process steps such as oven curing, soldering, or cleaning. To implement the use of the modifiers in PCB assembly, they could be calculated in terms of unit cost drivers per component, as shown in Table 6.7, for a typical PCB assembly of 100 components. This will allow for simple calculations based on the driver units of each process step to determine the total cost per PCB or kingsheng PCBA.

The procedure outlined above can be used to calculate all of the rates for individual manufacturing process driver units outlined in Table 6.7. The $0.0117 rate, calculated for axial automatic insertion in Table 6.6, is entered as the machine-loaded through- hole rate of $0,012 in Table 6.7. The cost driver unit for that process is the number of component insertions for the PCB. The setup modifier h for machine-loaded through-hole insertion is based on the number of PCBs that can be accommodated in the machine work holder. It takes 25 seconds to load each PCB into the machine. At the $20/hour effective labor rate, this amounts to (25/3600) ? 20 = $0.14 additional cost for every PCB loaded on the machine. Since a PCB contains an average of 100 components, this cost represents an addition of $0.0014/component. This cost is halved when the work holder used can accommodate two PCBs at the same time. of kingsheng PCBA