Table of Contents
Inputs to the Design
Associated RisksThe associated risks are derived from the engineering requirements and customer requirements. The risks cover both technical and safety risks.
Customer RequirementsThe customer requirements are derived from customer interviews as well as the PRP.
Engineering RequirementsThe engineering requirements are derived from translating the customer requirements in to quantitative goals.
Path to the Design
Updated Morphological ChartThe Morph chart shows a benchmarked design, and 5 alternative designs. The designs are all picked with a specific theme to the design.
Updated Pugh ChartThe 5 alternative designs are compared to the benchmark datum to best decide the best solution in the Pugh chart. They are weighted on a plus minus scale to find the best solution.
Feasibility AnalysisFirst, the precision of the cross feed is found. This is calculated using the smallest diameter tube, as a smallest diameter tube needs the tightest locational accuracy.
Next, the acceleration of the cross feed has to be found. The acceleration dictates the needed motor torque and the resulting pulley size.
The other motor requirements then follow from this torque and pulley size.
Once the motor and the pulley are designed, the cross feed mounting can be designed. To ensure that the mounting will not fail, an FEA analysis was done.
Final Component SelectionThe final components were decided on based on the feasibility analysis.
3-D Model Screenshots
Backlash Test PlanThis test plan is to quantify the backlash in the system to ensure that the positional tolerances can be met.
Speed Validation Test PlanThis test plan is to validate the designed speed of the cross feed.
Fulfillment of Requirements
Mitigated RisksThe green rows are risks that have been fully addressed. Yellow rows are risks that are in the process of being addressed.
Satisfied Engineering RequirementsThe green rows are engineering requirements that have been fully addressed. Yellow rows are engineering requirements that are in the process of being addressed.
Satisfied Customer RequirementsThe green rows are customer requirements that have been fully addressed. Yellow rows are customer requirements that are in the process of being addressed.
- Parts will need to be tested after being manufactured. The theoretical calculations and feasibility analysis show that the cross feed should preform as needed, but this needs to be proved through the test plans.
- The drive belt will need to be loaded to the maximum tension calculated for the machine before it is used to actuate the cross feed. A test plan needs to be written for this.
Unfulfilled Engineering Requirements
- Machine maintenance needs to be tracked as testing goes on. This will be an on-going study.
Unfulfilled Customer Requirements
- Machine maintenance will be tracked as testing is completed.
- The repeatability is calculated to be within the tolerance of what is needed. This will be tested and validated once the machine is complete.
- Guards for the belt still need to be designed.