![]() It is comprised of three sub-steps: panel prep, laminate & expose, and develop. The dry film photoresist (DFPR) operation is an integral step in the image transfer stage. The punch press should be used for orders of less than 200 circuit boards. Thus, for orders of more than 200 circuit boards, Donner Company should use the CNC router. At this point, both profiling methods require 250 minutes production time. For the profiling operation comparison, a breakeven analysis was also conducted to determine the minimum order size needed for the CNC routing production time to become less than the punch press production time.Īs evidenced in Exhibit 4, the breakeven order number for equal production times is 200 circuit boards. The manual drill should be used on all orders of less than 6 circuit boards. Thus, for orders of 6 or more circuit boards, Donner Company should use the CNC drill. For the drilling operation comparison, a breakeven order analysis was conducted in order to determine the minimum order size required for the CNC drilling production time to become less than the manual drilling production time.Īs seen in Exhibit 3, the breakeven order number for equal production times is approximately 5. Standard production times for the alternative methods for both of these operations are contained in Exhibit 2. Minimum order sizes required for the use of these CNC machines can be determined via a breakeven analysis comparing the CNC method with the manual method for both image transfer and profiling. Hammer action best replicates those possibilities.Although Donner Company has computer numerically controlled (CNC) drilling and routing machines, it has not set a formal standard for the productive use of these machines based upon size of an order. Although an acoustic piano keyboard might look like nothing more than a bunch of on/off switches, in reality there’s a range of volumes and timbres that you can achieve depending on how quickly or strongly you depress the keys. ![]() Second, it allows for more variation and musicality in the way you play a note. First, it helps you build finger strength while practicing (a spring-based action only minimally addresses this). Using a keyboard with weighted action is beneficial for multiple reasons. Graded, or progressive, hammer action takes that a step further by increasing the weight of the action as you descend to the lower notes on the keyboard. ![]() ![]() Hammer action uses a hammer mechanism like that found in an acoustic piano to replicate the feel. Semi-weighted action uses a spring to create the resistance you feel when pressing a key and its rebound when you lift your finger. With a digital piano, the closer the action is to that of an acoustic piano, the better. In piano lingo, action describes the way the piano keys feel when you press them. ![]()
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