Design-for-Tolerancing: Difference between revisions
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#Tolerancing depends on the tradeoff between manufacturability and functionality. The more precise and accurate the build, the higher the cost. The more precise and accurate a build - it may or may not achieve better functionality. There is a sweet spot where there is sufficient accuracy/precision, beyond which no performance improvement is achieved. Thus - effective design seeks to minimize cost and maximize performance. Effective production is achieved by having sufficient accuracy/precision (let's call it quality), but not excessive - as that is just a waste of effort and money. | #Tolerancing depends on the tradeoff between manufacturability and functionality. The more precise and accurate the build, the higher the cost. The more precise and accurate a build - it may or may not achieve better functionality. There is a sweet spot where there is sufficient accuracy/precision, beyond which no performance improvement is achieved. Thus - effective design seeks to minimize cost and maximize performance. Effective production is achieved by having sufficient accuracy/precision (let's call it quality), but not excessive - as that is just a waste of effort and money. | ||
#Tolerence requirement can be designed into the product being built - and when extensive effort is given to designing for lower tolerances - ease of build can increase and cost can decrease dramatically. That is what we have achieved in OSE's methods of [[Extreme Manufacturing]] | #Tolerence requirement can be designed into the product being built - and when extensive effort is given to designing for lower tolerances - ease of build can increase and cost can decrease dramatically. That is what we have achieved in OSE's methods of [[Extreme Manufacturing]] | ||
#Design for tolerancing is the art of designing for the minimum accuracy/precision requirements - without decreasing performance. This means retaining [[Robustness]]. This is not the same as [[Value Engineering]]] | #Design for tolerancing is the art of designing for the minimum accuracy/precision requirements - without decreasing performance. This means retaining [[Robustness]]. This is not the same as [[Value Engineering]]. Value engineering means accepting a tolerable loss of performance such as by using less material - while design-for-tolerancing makes no compromise on performance. In fact, the design as practiced by OSE actually increases performance. For example, the [[D3D Pro]] using a steel angle space frame, which is heavier and stronger than other 3D printers. | ||
#Design for Tolerancing depends completely on the function and purpose of the design in question. | #Design for Tolerancing depends completely on the function and purpose of the design in question: only by understanding in detail how a given device works can one make design choices in tolerancing to simplify build. Here, one must understand basics of forces, dimensions, and ratios to make proper assesment. A tolerance will typically be defined by the ratio of dimensions compared to other parts. | ||
#OSE's main use of design-for-tokerancing is to simplify parts manufacturing to allow common, off-the-shelf materials to be used as feedstocks. | |||
#The disadvantage - if it can be called a 'disadvantage' of design-for-tolerancing is that higher awareness (but not skill) is required during assembly. | |||
=Examples= | |||
#The 3D printer is a good case in point to demonstrate the above principles. | |||
For example, the tolerance of the D3D Pro frame is +/- 1/4". | |||
# | |||
Revision as of 17:47, 8 October 2022
This is one of OSE tenets - designing for allowing for maximum tolerances without diminishing performance.
Tolerance in design - [1]
Principles
- Tolerancing is the Precision and Accuracy with which parts are built to allow for parts fit in assembly, to guarantee the desired function.
- Tolerancing depends on the tradeoff between manufacturability and functionality. The more precise and accurate the build, the higher the cost. The more precise and accurate a build - it may or may not achieve better functionality. There is a sweet spot where there is sufficient accuracy/precision, beyond which no performance improvement is achieved. Thus - effective design seeks to minimize cost and maximize performance. Effective production is achieved by having sufficient accuracy/precision (let's call it quality), but not excessive - as that is just a waste of effort and money.
- Tolerence requirement can be designed into the product being built - and when extensive effort is given to designing for lower tolerances - ease of build can increase and cost can decrease dramatically. That is what we have achieved in OSE's methods of Extreme Manufacturing
- Design for tolerancing is the art of designing for the minimum accuracy/precision requirements - without decreasing performance. This means retaining Robustness. This is not the same as Value Engineering. Value engineering means accepting a tolerable loss of performance such as by using less material - while design-for-tolerancing makes no compromise on performance. In fact, the design as practiced by OSE actually increases performance. For example, the D3D Pro using a steel angle space frame, which is heavier and stronger than other 3D printers.
- Design for Tolerancing depends completely on the function and purpose of the design in question: only by understanding in detail how a given device works can one make design choices in tolerancing to simplify build. Here, one must understand basics of forces, dimensions, and ratios to make proper assesment. A tolerance will typically be defined by the ratio of dimensions compared to other parts.
- OSE's main use of design-for-tokerancing is to simplify parts manufacturing to allow common, off-the-shelf materials to be used as feedstocks.
- The disadvantage - if it can be called a 'disadvantage' of design-for-tolerancing is that higher awareness (but not skill) is required during assembly.
Examples
- The 3D printer is a good case in point to demonstrate the above principles.
For example, the tolerance of the D3D Pro frame is +/- 1/4".