This　paper　proposes　a　comprehensive　geometric　error　measurement　and　identification　method　for　a　tilt　table　equipped　in　a　five-axis　machine　tool　with　two　turntables　using　the　double　ballbar.　Three　positional　errors　of　the　socket,　caused　by　both　the　volumetric　error　and　linkage　error　of　the　tilt　table,　are　measured　in　the　sensitive　directions　with　simple　circular　paths.　A　mathematics　model　is　applied　to　map　the　relationship　between　the　night　results　that　are　from　three　installation　positions　of　the　socket　and　all　the　errors　of　the　tilt　table.　Firstly,　all　the　measured　results　are　applied　to　establish　the　average　axis　that　is　just　with　the　linkage　error　of　the　tilt　table　using　the　newly　developed　circular　fitting　method,　rather　than　solving　the　large-scale　linear　equations.　Then,　the　linkage　error　is　treated　as　the　trend　item　in　the　measured　results　for　it　keeps　constant　during　the　rotation　of　the　tilt　table.　Hence,　the　volumetric　error　is　identified　by　the　remaining　part　of　the　measured　results,　which　are　obtained　by　subtracting　the　part　caused　by　the　linkage　error,　using　the　pseudo　invert　matrix　method.　Meanwhile,　an　error　model　is　established　to　analyze　the　influence　of　the　installation　errors　of　the　socket　and　the　tool　cup.　Two　simple　correction　procedures,　using　a　low-cost　electron　clamp　and　an　easily　operated　circular　path,　are　developed　to　eliminate　these　two　installation　errors　before　the　ballbar　test.　Finally,　a　verification　experiment,　by　comparing　the　predicted　value　from　the　identified　errors　with　the　measured　results　by　the　ballbar,　is　carried　out　to　validate　the　effectiveness　and　correctness　of　the　proposed　method.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.