One should never ever measure things from a drawing. There are several reasons for this:

• The printer was misconfigured, and the output is nolonger in scale. This happens a lot. Even if not the printer has a limited resolution so very small details may be off anyway.

• The measurement may be inaccurate maybe the dimension in question is 10.1mm but the machinist measured from the drawing and interpretted it as 10mm. Bad! Also for longer spans the measurement may be a bit skewed etc.

• The drawing is a acceptance document, what your documenting is the acceptance criteria. You should thus have all the dimensions that matter to you marked out. Otherwise you may need to pay for all manufacturing defects.

  You should not mark out all dimensions just so much that the dimension loop is complete. So to not introduce conflicting information in the drawing. If you just add those dimensions put them in parentheses. This may be useful for the machinist if the acceptance criteria is not really useful for machining for some reason (this can be bad for very accurate parts though)

• if you totaly leave out a dimension loop then you are leaving things to the machinists judgement. While this may not be bad as such your letting somebody else do the thinking in a way that produces something spectacularily different from your needs. Most shops would not accept such jobs but your local machinist might.

But no you should try to add as few dimensions as possible that captures what your needs are. And suplement with as much data as the manufacturer needs to get things done.

One should never ever measure things from a drawing. There are several reasons for this:

• The printer was misconfigured, and the output is no longer in scale. This happens a lot. Even if not the printer has a limited resolution so very small details may be off anyway.

• The measurement may be inaccurate maybe the dimension in question is 10.1mm but the machinist measured from the drawing and interpreted it as 10mm. Bad! Also for longer spans the measurement may be a bit skewed etc.

• The drawing is an acceptance document, what you're documenting is the acceptance criteria. You should thus have all the dimensions that matter to you marked out. Otherwise you may need to pay for all manufacturing defects.

  You should not mark out all dimensions just so much that the dimension loop is complete. So to not introduce conflicting information in the drawing. If you just add those dimensions put them in parentheses. This may be useful for the machinist if the acceptance criteria is not really useful for machining for some reason (this can be bad for very accurate parts though).

• If you totally leave out a dimension loop then you are leaving things to the machinists judgement. While this may not be bad as such, you're letting somebody else do the thinking in a way that produces something spectacularly different from your needs. Most shops would not accept such jobs but your local machinist might.

But no you should try to add as few dimensions as possible that captures what your needs are. And suplement with as much data as the manufacturer needs to get things done.

One should never ever measure things from a drawing. There are several reasons for this:

• The printer was misconfigured, and the output is nolonger in scale. This happens a lot. Even if not the printer has a limited resolution so very small details may be off anyway.

• The measurement may be inaccurate maybe the dimension in question is 10.1mm but the machinist measured from the drawing and interpretted it as 10mm. Bad! Also for longer spans the measurement may be a bit skewed etc.

• The drawing is a acceptance document, what your documenting is the acceptance criteria. You should thus have all the dimensions that matter to you marked out. Otherwise you may need to pay for all manufacturing defects.

  You should not mark out all dimensions just so much that the dimension loop is complete. So to not introduce conflicting information in the drawing. If you just add those dimensions put them in parentheses. This may be useful for the machinist if the acceptance criteria is not really useful for machining for some reason (this can be bad for very accurate parts though)

• if you totaly leave out a dimension loop then you are leaving things to the machinists judgement. While this may not be bad as such your letting somebpdy else do the thinking in a way that produces something spectacularily different from your needs

But no you should try to add as few dimensions as possible that captures what your needs are. And suplement with as much data as the manufacturer needs to get things done.

One should never ever measure things from a drawing. There are several reasons for this:

• The printer was misconfigured, and the output is nolonger in scale. This happens a lot. Even if not the printer has a limited resolution so very small details may be off anyway.

• The measurement may be inaccurate maybe the dimension in question is 10.1mm but the machinist measured from the drawing and interpretted it as 10mm. Bad! Also for longer spans the measurement may be a bit skewed etc.

• The drawing is a acceptance document, what your documenting is the acceptance criteria. You should thus have all the dimensions that matter to you marked out. Otherwise you may need to pay for all manufacturing defects.

  You should not mark out all dimensions just so much that the dimension loop is complete. So to not introduce conflicting information in the drawing. If you just add those dimensions put them in parentheses. This may be useful for the machinist if the acceptance criteria is not really useful for machining for some reason (this can be bad for very accurate parts though)

• if you totaly leave out a dimension loop then you are leaving things to the machinists judgement. While this may not be bad as such your letting somebody else do the thinking in a way that produces something spectacularily different from your needs. Most shops would not accept such jobs but your local machinist might.

But no you should try to add as few dimensions as possible that captures what your needs are. And suplement with as much data as the manufacturer needs to get things done.