Using PolyWorks® to Calculate Shim Moves
3D SCAN IT Using PolyWorks® to Calculate Shim Moves Bob Squier – 3D Scan IT, Inc. 3D SCAN IT Opportunity for Improvement Certify 250 Assembly Trays based on 4 designs in 45 days 3D SCAN IT Old Shimming Process Measure Detail / Feature Determine Deviation Change Shim Remeasure Detail / Feature If ‘In Tolerance’ Move to next Detail / Feature Else Repeat Endif Write Down Shim Pack Total Create an Excel Shim Report 3D SCAN IT Our Way!!!! Off Site Get Tool CAD Model From Customer Extract All Shim Features From Model, including detail names Using Macro, Create Shim Log Report On Site Measure All Features Print & Place Shim Stickers Move On… Have Mechanic Adjust Shims as Required Remeasure All Features Shim Log is updated automatically 3D SCAN IT Why ‘Our Way’ is better! Using the CAD model saves time! Measuring everything at once improves accuracy FACT: Disassembling and Reassembling details ‘Moves Stuff!’ ‘Mechanics’ are Cheaper than ‘Metrology Engineers’ ‘Assembly Models’ contain the Part Detail Names A union Mechanic’s charge rate is usually half the cost of a Metrology Engineer’s Stickers reduce Communication Errors Let the computer calculate the new shim pack Eliminates ‘moving the wrong way’ Shimming can be performed ‘off line’ 3D SCAN IT Using the CAD model saves time! ‘Pick On CAD for All Features ‘Assembly Models’ contain the part Detail Names Create Macros to speed it up! Let the Computer Do the Math Determine the Shimming Vector If Adding Shim moves the Detail in the Positive Control Direction the Shim is considered a “+” i.e. Y & Z If Adding Shim moves the Detail in the Negative Control Direction the Shim is considered a “-” i.e. X 3D SCAN IT 3D SCAN IT Stickers Reduce Communication Errors Convey Everything the Mechanic needs to know on something they can touch and feel. Detail Name Old Shim Value Current Deviation New Shim Value Direction of Move Comparison of Time Requirements and Cost Savings Our Way Old Way Personnel Rate Time Cost Personnel Rate Time Cost Metrology 1.0 1.0 $100 Metrology 1.0 0.25+0.25 $50 Mechanic 0.5 1.0 $50 Mechanic 0.5 1.0 $50 2.0 $150 TOTAL 1.5 $100 TOTAL 3D SCAN IT RESULTS: Opportunity for Improvement Certify 250 Assembly Trays based on 4 designs in 45 days Completed 1 WEEK early 3D SCAN IT Thank You! Bob Squier Bob@3DScanIT.com (248) 705-0678 Mobile www.3DScanIT.com
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