Improved Accuracy Tools

Date: Wed Apr 14 1999 - 14:50:51 EEST

-- [ From: Al Hastbacka * EMC.Ver #2.5.3 ] --

When making injection molding tools, one of Sanders customers has found
a way to improve on the very high accuracy of the Sanders Model Maker II
(best accuracy of the commercially available US RP systems).

This is how it was done..

1. Fabricate the tool pattern on the ModelMaker II
2.Send it to NDM for fabrication of the tool
3. Measure the resulting tool
4. Resize the CAD file to compensate for the measured errors
5. Fabricate the second tool pattern on the ModelMaker II keeping all of
the configuration files as they were in step 1.
6. Send the second tool pattern to NDM for fabricating the tool in
stainless steel
7. Measure the second version of the tool

The measurements of the second tool were found to track within 1/2 to
one mil of the original CAD file.

Al Hastbacka

For more information about the rp-ml, see

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